Tootfinder

Automatic Classification of Magnetic Chirality of Solar Filaments from H-Alpha Observations
Alexis Chalmers, Azim Ahmadzadeh
https://arxiv.org/abs/2509.18214 https://

Thin filaments in Hele-Shaw cells
Nitay Ben-Shachar, Michael C. Dallaston, Scott W. McCue
https://arxiv.org/abs/2507.13507 https://ar…

Thin filaments in Hele-Shaw cells
Using a recently derived filament model, the stability of fluid filaments in Hele-Shaw cells, driven by a constant pressure gradient, is studied. It is found that thin circular filaments grow if their initial radius exceeds a dimensionless critical radius. Further, linear stability of the axisymmetric solution reveals that all modes are stable for twice this critical radius, with modes becoming unstable for larger radii. A translating circular solution is found for asymptotically large radius, …

Statistical Investigation of B-fields in Cores and Filaments Using JCMT/SCUPOL Legacy Survey Archival Data
Puja Porel
https://arxiv.org/abs/2508.15287 https://

Statistical Investigation of B-fields in Cores and Filaments Using JCMT/SCUPOL Legacy Survey Archival Data
SCUPOL, the polarimeter for SCUBA on the James Clerk Maxwell Telescope (JCMT), was used for polarization observations of 104 regions at 850 micron wavelength and 15 arcsec resolution in the mapping mode by Matthews et al. (2009). They presented the polarization values and magnetic field morphologies in these regions. In this work, we took the opportunity to use this big legacy survey data to investigate further the collective statistical properties of the measured polarization in different star…

Star-forming galaxies in the cosmic web in the last 11 Gyr
B. Jego, K. Kraljic, M. B\'ethermin, R. Dav\'e
https://arxiv.org/abs/2509.18077 https://…

Star-forming galaxies in the cosmic web in the last 11 Gyr
We investigate how the star formation activity of galaxies depends on their position within the cosmic web using the SIMBA cosmological simulation from redshift $z=3$ to $z=0$. While previous studies found that galaxies closer to filaments tend to be more massive and quenched, it remained unclear whether these trends reflect intrinsic environmental effects or changes in the galaxy population mix. To address this, we focus exclusively on star-forming galaxies, robustly selected using both the sp…

3D fast-mode Wave Propagation from Corona to Chromosphere: Triggering Mechanism for 3D Oscillations of filaments
Yunxue Huang, Qin Feng, Yuhu Miao, Zhining Qu, Ke Yu, Hongfei Liang, Yu Liu, Xinping Zhou
https://arxiv.org/abs/2507.14837

3D fast-mode Wave Propagation from Corona to Chromosphere: Triggering Mechanism for 3D Oscillations of filaments
Moreton waves are widely regarded as the chromospheric counterpart of extreme ultraviolet (EUV) waves propagating in the corona. However, direct observational evidence confirming their simultaneous propagation across multiple atmospheric layers from the corona through the transition region to the chromosphere has been lacking. In this study, we present comprehensive observational evidence of a three-dimensional (3D) fast-mode wave propagating from the corona through the transition region into t…

Replaced article(s) found for cond-mat.soft. https://arxiv.org/list/cond-mat.soft/new
[1/1]:
- Structural Anisotropy Stabilises Asymmetric Beating in Instability Driven Filaments
Bethany Clarke, Yongyun Hwang, Eric E Keaveny

Environmental history of filament galaxies: stellar mass assembly and star-formation of filament galaxies
D. Zakharova, G. De Lucia, B. Vulcani, F. Fontanot, L. Xie
https://arxiv.org/abs/2509.17697

Environmental history of filament galaxies: stellar mass assembly and star-formation of filament galaxies
Galaxy properties correlate with their position within the cosmic web. While galaxies are observed in an environment today, they may have experienced different environments in the past. The environmental history, linked to pre-processing, leaves an imprint on the properties of galaxies. We use the GAEA semi-analytic model and IllustrisTNG to reconstruct the environmental histories of galaxies between $z=0$ and $z=4$ that today reside in filaments. Our goal is to understand how galaxy properties…

Tracing Missing Baryons in the Cosmic Filaments with tSZ and CMB-Lensing Stacking
Jianzhuo Li, Yi Zheng, Weishan Zhu
https://arxiv.org/abs/2507.08561 https…

Tracing Missing Baryons in the Cosmic Filaments with tSZ and CMB-Lensing Stacking
We investigate the distribution of missing baryons in cosmic filaments by stacking approximately 31,300 filaments across the northern and southern SDSS sky regions using Planck Compton-$y$ and CMB lensing maps. Filaments are identified using the DisPerSE algorithm applied to the SDSS LOWZ-CMASS galaxy samples, selecting structures with lengths between 30-100 cMpc and redshifts in the range $0.2 < z < 0.6$. Radial profiles are extracted out to 25 cMpc from the filament spines, and galaxy cluster…

Emergent Softening and Stiffening Dictate Transport of Active Filaments
Bipul Biswas, Prasanna More, Hima Nagamanasa Kandula
https://arxiv.org/abs/2507.08535

Emergent Softening and Stiffening Dictate Transport of Active Filaments
Active semiflexible filaments are crucial in various biophysical processes, yet insights into their single-filament behavior have predominantly relied on theory and simulations, owing to the scarcity of controllable synthetic systems. Here, we present an experimental platform of active semiflexible filaments composed of dielectric colloidal particles, activated by an alternating electric field that induces contractile or extensile electrohydrodynamic (EHD) flows. Our experiments reveal that con…

Why is this not better known? Machines to convert our plastic waste into 3D printer filaments.: https://avatar42.social/2025/08/14/why-is-this-not-better.html

A Neutron Sensitive Detector Using 3D-Printed Scintillators
Adam Barr, Cinzia da Vi\`a, Mosst Tasnim Binte Shawkat, Stephen Watts, John Allison, Gabriele D'Amen
https://arxiv.org/abs/2507.08663

A Neutron Sensitive Detector Using 3D-Printed Scintillators
This work reports on the performance of a novel neutron-sensitive scintillating detector fabricated using Fused-Deposition Modelling (FDM) additive manufacturing. FDM is a cost-effective 3D-printing method employing flexible plastic filaments to create custom-shaped components. Scintillating filaments, based on polystyrene doped with \emph{p}-terphenyl and 1,4-bis (5-phenyloxazol-2-yl) benzene, and enriched with $^6$LiF to enable neutron sensitivity were manufactured in house and achieved visib…

Linear stability of an oceanic front at finite Rossby number
Subhajit Kar, Roy Barkan, John R. Taylor
https://arxiv.org/abs/2507.13304 https://

Linear stability of an oceanic front at finite Rossby number
Submesoscale currents in the ocean's mixed layer (ML), consisting of fronts, eddies, and filaments, are characterized by order one Rossby (Ro) and Richardson (Ri) numbers. These currents play a crucial role in mediating vertical exchange between the surface and ocean interior and in facilitating cross-scale energy transfers. Despite a growing understanding of their generation mechanisms and energy pathways, two fundamental questions remain unresolved - how does a finite Ro modify the dynamics o…

Evidence For Turbulent Concentration In Particle-Laden Midplane Layers of Planet-Forming Disks
Orkan M. Umurhan, Debanjan Sengupta, Paul R. Estrada
https://arxiv.org/abs/2508.05858

Evidence For Turbulent Concentration In Particle-Laden Midplane Layers of Planet-Forming Disks
In this study we investigate the axisymmetric, weakly turbulent state of settled particle layers in a localized model of a protoplanetary disk. We focus on conditions in which the large-scale axisymmetric filaments typically associated with the streaming instability (SI) either cannot form or have not yet developed. Under these circumstances, we observe small-scale particle clumping consistent with turbulent concentration (TC), in which short particle filaments collect along regions of high gas…

Elastohydrodynamics of 3D chemically active filaments
Matthew D Butler, Benjamin J Walker, Thomas Montenegro-Johnson, Panayiota Katsamba
https://arxiv.org/abs/2507.03586

Elastohydrodynamics of 3D chemically active filaments
Active deformable filaments exhibit a large range of qualitatively different three-dimensional dynamics, depending on their flexibility, the strength of the active forcing, and the surrounding environment. For a sufficiently strong activity, the resulting forces buckle the filament into different shapes, altering its dynamic behaviour. We investigate the dynamic behaviour of elastic, chemically propelled phoretic filaments, combining two existing models; a local version of slender phoretic theo…

There's a big biological component at work with Yellowstone's geothermal terraces.
The first hint is the color -- there's definitely microbial life involved in the terraces.
So what's happening?
In faster water microbes form clumps and filaments.
In slower water you can see just the barest hint of terraces forming.

First critical field in the pinned three dimensional Ginzburg-Landau model of superconductivity
Mat\'ias D\'iaz-Vera, Carlos Rom\'an
https://arxiv.org/abs/2507.10915

First critical field in the pinned three dimensional Ginzburg-Landau model of superconductivity
We study extreme type-II superconductors described by the three dimensional magnetic Ginzburg-Landau functional incorporating a pinning term $a_\varepsilon(x)$, which we assume to be a bounded measurable function satisfying $b\leq a_\varepsilon(x)\leq 1$ for some constant $b>0$. A hallmark of such materials is the formation of vortex filaments, which emerge when the applied magnetic field exceeds the first critical field $H_{c_1}$. In this work, we provide a lower bound for this critical field …

Optical branched flow in nonlocal nonlinear medium
Tongxun Zhao, Yudian Wang, Ruihan Peng, Peng Wang, Fangwei Ye
https://arxiv.org/abs/2509.10394 https://a…

Optical branched flow in nonlocal nonlinear medium
When light propagates through a randomly correlated, slowly varying medium, it generates optical branched flow. Previous studies have demonstrated that the self-focusing effect in optical media can accelerate the appearance of the first branching points and sharpen the filaments of branched flow. In this study, we investigate the influence of the nonlocality of the nonlinear response on branched flow. We find that, due to its averaging effect, as the range of nonlocality increases, the first br…

The Blooming Tree Algorithm at Work: Clusters, Filaments and Superclusters in the Field of A2029
Heng Yu, Antonaldo Diaferio
https://arxiv.org/abs/2508.07828 https://

The Blooming Tree Algorithm at Work: Clusters, Filaments and Superclusters in the Field of A2029
The Blooming Tree (BT) algorithm, based on the hierarchical clustering method, is designed to identify clusters, groups, and substructures from galaxy redshift surveys. We apply the BT algorithm to a wide-field ($10\times 10$ deg$^2$) spectroscopic dataset centered on the galaxy cluster A2029. The BT algorithm effectively identifies all the X-ray luminous clusters and most of the optical clusters known in the literature, numerous groups, and the filaments surrounding the clusters, associating a…

Active Filaments on Curved Surfaces: From Single Filaments to Dilute Suspensions
Giulia Janzen, Euan D. Mackay, Rastko Sknepnek, D. A. Matoz-Fernandez
https://arxiv.org/abs/2507.23616

Active Filaments on Curved Surfaces: From Single Filaments to Dilute Suspensions
Curvature plays a central organizational role in active polymer dynamics. Using large-scale Langevin-dynamics simulations, we study active semiflexible filaments confined to smooth curved surfaces and map how curvature, bending rigidity, and activity interact. We find geodesic alignment, curvature lensing, and curvature-induced trapping. In particular, regions of negative Gaussian curvature localize filaments and hinder global surface exploration. These results show how surface geometry can be …

Orientation of galaxy spins relative to filaments of the large-scale structure of the Universe
A. V. Antipova, D. I. Makarov, N. Libeskind, E. Tempel
https://arxiv.org/abs/2507.07334

Orientation of galaxy spins relative to filaments of the large-scale structure of the Universe
The theory of galaxy formation posits a clear correlation between the spin of galaxies and the orientation of the elements of the large-scale structure of the Universe, particularly cosmic filaments. A substantial number of observational and modelling studies have been undertaken with the aim of identifying the dependence of spin orientation on the components of the large-scale structure. However, the findings of these studies remain contradictory. In this paper, we present an analysis of the o…

The Kinematical Behavior of Solar Eruptive Filaments Affected by the Poloidal Magnetic Field
Ye Qiu, Yang Guo, Mingde Ding, Chuan Li, Linggao Kong, Zhen Li
https://arxiv.org/abs/2508.17039

The Kinematical Behavior of Solar Eruptive Filaments Affected by the Poloidal Magnetic Field
Kinematics of solar eruptive filaments is one of the important diagnostic parameters for predicting whether solar eruptions would induce geomagnetic storms. Particularly, some geomagnetic storms might be induced by solar filament eruptions originating from unexpected surface source regions because of non-radial ejection. The non-radial ejection of filaments has received widespread attention but remains inconclusive. We select two eruptive filaments, both of which are supported by flux ropes, as…

From lines to networks
Marc Barthelemy
https://arxiv.org/abs/2509.07951 https://arxiv.org/pdf/2509.07951

From lines to networks
Many real-world networks, ranging from subway systems to polymer structures and fungal mycelia, do not form by the incremental addition of individual nodes but instead grow through the successive extension and intersection of lines or filaments. Yet most existing models for spatial network formation focus on node-based growth, leaving a significant gap in our understanding of systems built from spatially extended components. Here we introduce a minimal model for spatial networks, rooted in the …

Transport of Particles in Strongly Turbulent 3D Magnetized Plasmas
Heinz Isliker, Loukas Vlahos
https://arxiv.org/abs/2508.05727 https://arxiv.org/pdf/2508…

Transport of Particles in Strongly Turbulent 3D Magnetized Plasmas
In this review, we examine particle transport in strongly turbulent three-dimensional (3D) magnetized plasmas, characterized by intense (large-amplitude) magnetic field fluctuations. Such environments naturally give rise to a network of coherent structures (CoSs), including current sheets, filaments, shocks, switchbacks, and significant magnetic perturbations, which critically influence particle dynamics at the kinetic level. Within this turbulent regime, two fundamental particle energization m…

The Filament Rift: $\Lambda$CDM's Structural Challenge Against Observation
Saeed Tavasoli, Parsa Ghafour
https://arxiv.org/abs/2508.07480 https://arxiv…

The Filament Rift: $Λ$CDM's Structural Challenge Against Observation
This study presents the first extended comparison of cosmic filaments identified in SDSS DR10 observations ($z < 0.05$) and the IllustrisTNG300-1 $Λ$CDM simulation ($z = 0$), utilizing the novel GrAviPaSt filament-finder method. The analyses are performed on both macro- and micro-filaments, each characterized by their length, thickness, and contrast in mass density. In addition to total sample comparisons, two subcategories of micro-filaments, GG (linking galaxy groups) and CC (linking galaxy …

Instability and self-propulsion of flexible autophoretic filaments
Ursy Makanga, Akhil Varma, Panayiota Katsamba
https://arxiv.org/abs/2509.10153 https://a…

Instability and self-propulsion of flexible autophoretic filaments
Over the past decade, autophoretic colloids have emerged as a prototypical system for studying self-propelled motion at microscopic scales, with promising applications in microfluidics, micro-machinery, and therapeutics. Their motion in a viscous fluid hinges on their ability to induce surface slip flows that are spatially asymmetric, from self-generated solute gradients. Here, we demonstrate theoretically that a straight elastic filament with homogeneous surface chemical properties -- which is…

Galaxy And Mass Assembly (GAMA): from filaments to voids, how extreme environment affects gas metallicity and SFR in galaxies
J. A. Molina-Calzada, M. A. Lara-L\'opez, J. Gallego, A. M. Hopkins, Benne W. Holwerda, A. R. L\'opez-S\'anchez
https://arxiv.org/abs/2507.06781

Galaxy And Mass Assembly (GAMA): from filaments to voids, how extreme environment affects gas metallicity and SFR in galaxies
We analyse the stellar mass-metallicity (M-Z) and stellar mass-star formation rate (M-SFR) relations for star-forming galaxies classified by their environment and compare them with matched control samples of field galaxies. Using data from the Galaxy And Mass Assembly (GAMA) survey and the filament catalogue, which categorises galaxies into filaments, tendrils, and voids, we correct emission lines for dust extinction and select star-forming galaxies based on the BPT diagram. Metallicity and sta…

Formation of axially modulated plasma strings by filamentation of interfering femtosecond Bessel beams
Fatemeh Mansourimanesh, Amirreza Sadeghpour, Daryoush Abdollahpour
https://arxiv.org/abs/2508.10163

Formation of axially modulated plasma strings by filamentation of interfering femtosecond Bessel beams
We numerically investigate the formation of axially modulated plasma strings through the filamentation of two interfering femtosecond Bessel beams. The constituent Bessel beams have different central spot sizes and propagate collinearly. Our results show that filamentation of these beams in air leads to the formation of intense axially modulated light filaments, and corrugated plasma strings with high modulation depths and tunable modulation periods. We find that the modulation periods of the i…

A Melody in the Noise: Modeling Echoes of the Crab Nebula
Thierry Serafin Nadeau, Marten H. van Kerkwijk
https://arxiv.org/abs/2507.23214 https://arxiv.org…

A Melody in the Noise: Modeling Echoes of the Crab Nebula
Pulses from the Crab pulsar are often followed by ``echoes'', produced by radiation that was deflected by small filamentary structures in the Crab nebula and thus traveled via longer paths. We describe a simplified but detailed model that treats the filaments as cylinders of dense, neutral material with a thin ionized skin. In this picture, echoes are produced when the line of sight crosses the skin at glancing incidence, which naturally leads to the large electron column density gradients requ…

On the width and profiles of cosmic filaments
Qi-Rui Yang, Weishan Zhu, GuangYao Yu, Jian-Feng Mo, Yi Zheng, Long-Long Feng
https://arxiv.org/abs/2507.02476

On the width and profiles of cosmic filaments
We investigated the widths and profiles of cosmic filaments using the IllustrisTNG simulations. Filaments were identified with DisPerSE, using galaxy samples in simulations as input. Since the width of an individual filament can vary significantly along its spine, we divided each filament into segments with lengths between $1.5\,h^{-1}\,\mathrm{Mpc}$ and $2.5\,h^{-1}\,\mathrm{Mpc}$ and measure their properties. The typical width of these filament segments increases gradually from approximately …

Termination-Dependent Resistive Switching in SrTiO$_3$ Valence Change Memory Cells
Marko Mladenovi\'c, Manasa Kaniselvan, Christoph Weilenmann, Alexandros Emboras, Mathieu Luisier
https://arxiv.org/abs/2507.00318

Termination-Dependent Resistive Switching in SrTiO$_3$ Valence Change Memory Cells
Valence change memory (VCM) cells based on SrTiO$_3$ (STO), a perovskite oxide, are a promising type of emerging memory device. While the operational principle of most VCM cells relies on the growth and dissolution of one or multiple conductive filaments, those based on STO are known to exhibit a distinctive, 'interface-type' switching, which is associated with the modulation of the Schottky barrier at their active electrode. Still, a detailed picture of the processes that lead to interface-typ…

Crosslisted article(s) found for physics.bio-ph. https://arxiv.org/list/physics.bio-ph/new
[1/1]:
- Applying a Gaussian networking theory to model motor-driven transport along cytoskeletal filaments
Nadine du Toit, Kristian K. M\"uller-Nedebock

A 15 Mpc rotating galaxy filament at redshift z = 0.032
Madalina N. Tudorache, S. L. Jung, M. J. Jarvis, I. Heywood, A. A. Ponomareva, A. Varasteanu, N. Maddox, T. Yasin, M. Glowacki
https://arxiv.org/abs/2508.13053

A 15 Mpc rotating galaxy filament at redshift z = 0.032
Understanding the cold atomic hydrogen gas (HI) within cosmic filaments has the potential to pin down the relationship between the low density gas in the cosmic web and how the galaxies that lie within it grow using this material. We report the discovery of a cosmic filament using 14 HI-selected galaxies that form a very thin elongated structure of 1.7 Mpc. These galaxies are embedded within a much larger cosmic web filament, traced by optical galaxies, that spans at least $\sim 15$~Mpc. We fin…

Stochastic size control of self-assembled filaments
Maximilian C. H\"ubl, Carl P. Goodrich
https://arxiv.org/abs/2507.04985 https://

Stochastic size control of self-assembled filaments
Controlling the size and shape of assembled structures is a fundamental challenge in self-assembly, and is highly relevant in material design and biology. Here, we show that specific, but promiscuous, short-range binding interactions make it possible to economically assemble linear filaments of user-defined length. Our approach leads to independent control over the mean and width of the filament size distribution and allows us to smoothly explore design trade-offs between assembly quality (spre…

Crosslisted article(s) found for physics.flu-dyn. https://arxiv.org/list/physics.flu-dyn/new
[1/1]:
- Instability and self-propulsion of flexible autophoretic filaments
Ursy Makanga, Akhil Varma, Panayiota Katsamba

Probe the missing baryons in cosmic filaments with Fast Radio Bursts
Jian-Feng Mo, Weishan Zhu, Qi-Rui Yang, Yi Zheng, Long-Long Feng
https://arxiv.org/abs/2508.19861 https://…

Probe the missing baryons in cosmic filaments with Fast Radio Bursts
Cosmic filaments are thought to host a substantial fraction of the missing baryons at redshifts $z<2$. In this study, we probe the baryonic content of these filaments using localized Fast Radio Bursts (FRBs). Filaments are identified from the galaxy distribution in the Dark Energy Spectroscopic Instrument (DESI) imaging surveys using the DisPerSe algorithm. We find tentative evidence ($\sim 3 σ$ significance) for a divergence in the relationship between the dispersion measure (DM) contributed …

Magnetic properties of orphan penumbrae
J. S. Castellanos Dur\'an, B. L\"optien, A. Korpi-Lagg, S. K. Solanki, M. van Noort
https://arxiv.org/abs/2507.08117

Magnetic properties of orphan penumbrae
Orphan penumbrae (OPU) are features resembling sunspot penumbrae, but are not connected to an umbra. Here we compare OPUs and sunspot penumbrae, including their filaments. We also identify and describe the main mechanisms for the formation of OPUs and we characterise their decay process. Our study is based on spectropolarimetric inversions of active regions observed with the Hinode spectropolarimeter. We manually identified 80 individual OPUs, allowing us to study them statistically. In additio…

Properties of the cores and filaments in the Ophiuchus molecular cloud and its L1688 hub-filament system
Bo-Sheng Jia, Guo-Yin Zhang, Alexander Menshchikov, Sami Dib, Jin-Zeng Li, Ke Wang, Di Li, Xue-Mei Li, Zhi-Yuan Ren, Chang Zhang, Nageen Pervaiz, Lin Xiao
https://arxiv.org/abs/2506.20619…

Properties of the cores and filaments in the Ophiuchus molecular cloud and its L1688 hub-filament system
Analyzing filaments and cores in molecular clouds is key to understanding galactic star formation and its environmental dependence. This paper studies the properties and distribution of dense cores and filaments in the Ophiuchus molecular cloud, with a focus on the L1688 hub-filament system (HFS) and its star formation potential. We extracted sources and filaments from Herschel images and a 13.5 arcsec resolution surface density map using the getsf method, identified prestellar cores among the …

Breakup cascade in gas filament
Ali\'enor Rivi\`ere (PMMH), Zehua Liu (MAE), Jishen Zhang (PMMH), Laurent Duchemin (PMMH), Luc Deike (HMEI), St\'ephane Perrard (PMMH)
https://arxiv.org/abs/2508.00872

Breakup cascade in gas filament
Despite its importance in both geophysical and industrial contexts, the inertial fragmentation of gas filaments has received much less attention than their liquid counterparts. Yet, gas filaments produce the smallest bubble sizes, which drive gas dissolution, critical to ocean-atmosphere exchange such as carbon dioxide and oxygen, as well as marine aerosols emission, serving as nuclei for cloud condensation and ice particle production. Here, we unravel the fundamental physics governing the spli…

Time-resolved and three-dimensional elucidation of the complex refractive index alteration induced by ultrashort laser pulses
Takumi Koike, Yusuke Ito, Naohiko Sugita
https://arxiv.org/abs/2506.22582

Time-resolved and three-dimensional elucidation of the complex refractive index alteration induced by ultrashort laser pulses
Ultrashort pulse lasers (USPLs) have attracted attention as tools capable of inducing unique phenomena by instantaneously generating regions with transiently modified properties (filaments) in the material. However, a comprehensive understanding of USPL-induced filaments remains elusive due to the complexity of their dynamics and insufficient imaging techniques to accurately capture them. In this study, we propose a novel methodology to measure the transient complex refractive index of filament…

B-fields And dust in interstelLar fiLAments using Dust POLarization (BALLAD-POL): IV. Grain alignment mechanisms in Cocoon Nebula (IC 5146) using polarization observations from JCMT/POL-2
Saikhom Pravash, Thiem Hoang, Archana Soam, Eun Jung Chung, Pham Ngoc Diep, Nguyen Bich Ngoc, Le Ngoc Tram
https://arxiv.org/abs/2507.07205

B-fields And dust in interstelLar fiLAments using Dust POLarization (BALLAD-POL): IV. Grain alignment mechanisms in Cocoon Nebula (IC 5146) using polarization observations from JCMT/POL-2
The polarization of starlight and thermal dust emission from aligned non-spherical grains provides a powerful tool for tracing magnetic field morphologies and strengths in diffuse interstellar medium to star-forming regions, and constraining dust grain properties and their alignment mechanisms. However, the physics of grain alignment is not yet fully understood. The alignment based on RAdiative Torques (RATs), known as RAT Alignment or RAT-A mechanism is the most acceptable mechanism. In this w…

Actin driven morphogenesis in hydra
Sabyasachi Mukherjee, Anirban Sain
https://arxiv.org/abs/2509.08655 https://arxiv.org/pdf/2509.08655

Actin driven morphogenesis in hydra
Hydra, a centimeter long cylindrical-shaped freshwater organism, has emerged as an interesting model system for studying morphogenesis in animals. Recently, fluorescent imaging of cytoskeletal actin filaments on the outer surface of hydra has revealed nematic-type arrangement of actin filaments. {Several topological defects in the nematic field have also been detected. In particular, aster-like +1 defects appear at the curved head of hydra and at the tip of its tentacles, while -1/2 defects are…

Filamentation of the electromagnetic precursor in relativistic quasi-perpendicular electron-positron shocks
Emanuele Sobacchi, Yuri Lyubarsky, Lorenzo Sironi, Masanori Iwamoto
https://arxiv.org/abs/2507.22561

Filamentation of the electromagnetic precursor in relativistic quasi-perpendicular electron-positron shocks
We present a scenario that could explain non-thermal particle acceleration in relativistic quasi-perpendicular electron-positron shocks, such as the termination shock of pulsar wind nebulae. The shock produces a strong electromagnetic precursor that propagates into the upstream plasma, which is initially threaded by a uniform background magnetic field. We show that the filamentation instability breaks the precursor into radiation filaments parallel to the shock normal. The transverse scale of t…

The invariance of group occupation across the cosmic web
Vicente Izzo Dominguez, Facundo Rodriguez, Antonio D. Montero-Dorta
https://arxiv.org/abs/2509.09800 https://

The invariance of group occupation across the cosmic web
Recent efforts to identify secondary variations in the Halo Occupation Distribution (HOD) have primarily focused on simulations examining the role of large-scale cosmic environments such as superclusters, filaments, and underdense regions or voids. If present, these variations could yield valuable insights into galaxy formation mechanisms, halo assembly processes, and the influence of external factors on cosmic structure. We aim to test whether secondary trends in the HOD driven by the large-sc…

Applying a Gaussian networking theory to model motor-driven transport along cytoskeletal filaments
Nadine du Toit (Department of Physics, Stellenbosch University, Stellenbosch, South Africa), Kristian K. M\"uller-Nedebock (Department of Physics, Stellenbosch University, Stellenbosch, South Africa, National Institute for Theoretical and Computational Sciences, Stellenbosch, South Africa)

Applying a Gaussian networking theory to model motor-driven transport along cytoskeletal filaments
This paper builds on a recently introduced dynamical networking framework, applying it to model motor-driven transport along cytoskeletal filament networks. Within this approach, the networking functional describes the periodic binding and unbinding of motors to available filament sites,whilst accounting for all possible pairing, enabling a field-theoretic treatment of constrained motion in complex networks. In this application, the dynamical networking theory is introduced into a Martin-Siggia…

Alignment of spiral and elliptical galaxies from Siena Galaxy Atlas with filaments
Yuvraj Muralichandran, Noam I. Libeskind, Elmo Tempel
https://arxiv.org/abs/2509.02062 https:/…

Alignment of spiral and elliptical galaxies from Siena Galaxy Atlas with filaments
The properties of galaxies are known to have been influenced by the large-scale structures that they inhabit. Theory suggests that galaxies acquire angular momentum during the linear stage of structure formation, and hence predict alignments between the spin of halos and the nearby structures of the cosmic web. In this study, we use the largest catalog of galaxies publicly available - the Siena Galaxy Atlas - to study the alignment of the spin normals of elliptical and spiral galaxies with fila…

Two-sided-loop jet originates from the filament internal reconnection
Yunxue Huang, Jialin Li, Zhining Qu, Ke Yu, Hongfei Liang, Rui Xue, Xinping Zhou
https://arxiv.org/abs/2509.00410

Two-sided-loop jet originates from the filament internal reconnection
Magnetic reconnection driving two-sided-loop jet is typically associated with interactions between an emerging bipole and the overlying horizontal magnetic field, or between filaments from separate magnetic systems. Leveraging high temporal and spatial resolution observations from ground-based and space-borne instruments, we have identified a two-sided-loop jet originating from magnetic reconnection between threads within a single filament. Our observations show that as two initially crossing f…

Collective filament wrapping and nested spiral formation in active polydisperse systems
Caterina Landi, Giulia Janzen, Francesco Sciortino, John Russo, Chantal Valeriani, Daniel A. Matoz-Fernandez
https://arxiv.org/abs/2507.20969

Collective filament wrapping and nested spiral formation in active polydisperse systems
We investigate a two-dimensional polydisperse suspension of self-propelled semiflexible filaments and reveal a collective wrapping mechanism that is absent in monodisperse systems. At intermediate activity levels, long filaments coil around shorter ones, forming nested spiral structures stabilized by filament length disparity. These assemblies generalize the single-filament spiraling seen in active systems into cooperative, multi-filament configurations. As activity increases, the nested spiral…

Galaxy quenching across the Cosmic Web: disentangling mass and environment with SDSS DR18
Anindita Nandi, Biswajit Pandey
https://arxiv.org/abs/2507.18614 https://

Galaxy quenching across the Cosmic Web: disentangling mass and environment with SDSS DR18
We investigate the influence of large-scale cosmic web environments on galaxy quenching using a volume-limited, stellar mass-matched galaxy sample from SDSS DR18. Galaxies are classified as residing in sheets, filaments, or clusters based on the eigenvalues of the tidal tensor derived from the smoothed density field. The quenched fraction increases with stellar mass and is highest in clusters, intermediate in filaments, and lowest in sheets, reflecting the increasing efficiency of environmental…

Fractal Properties of the Cosmic Web
Jaan Einasto
https://arxiv.org/abs/2509.04252 https://arxiv.org/pdf/2509.04252…

Fractal Properties of the Cosmic Web
The cosmic web is one of the most complex systems in nature, consisting of galaxies and clusters of galaxies joined by filaments and walls, leaving large empty regions called cosmic voids. The most common method of describing the web is a correlation function and its derivative, the fractal function. In this paper, I provide a review of the fractal properties of the cosmic web from the observational point of view within the Newtonian concordance $Λ$CDM Universe framework. I give a brief histor…

Replaced article(s) found for astro-ph.GA. https://arxiv.org/list/astro-ph.GA/new
[1/1]:
- Non-thermal filaments and AGN recurrent activity in the galaxy group Nest200047: a LOFAR, uGMRT, ...
M. Brienza, et al.

Active Extensile Hydrogels Actuated by Living Polymers of the Bacterial Cytokinetic Protein FtsZ
Mikheil Kharbedia, Diego Herr\'aez-Aguilar, Macarena Calero, Horacio L\'opez-Men\'endez, Clara Luque-Rioja, Lara H. Moleiro, Cruz Santos, Pilar Lillo, Francisco Monroy
https://arxiv.org/abs/2508.04431

Active Extensile Hydrogels Actuated by Living Polymers of the Bacterial Cytokinetic Protein FtsZ
Active materials capable of autonomously modulating their mechanical properties are foundational to the development of next-generation soft technologies. Here, we introduce a novel class of extensible biohybrid hydrogels powered by living polymers of the bacterial cytokinetic protein FtsZ. When embedded within a polyacrylamide (PA) matrix, GTP-fueled FtsZ filaments self-organize into treadmilling structures that generate internal extensible stresses, driving reversible softening, swelling, and …

Mapping Magnetic Fields from Clouds to Cores with PRIMAger
Kate Pattle, Janik Karoly, Lorna Buhil Findlay, Simon Coud\'e, Brandon S. Hensley, Paulo C. Cortes, James Di Francesco, Valentin J. M. Le Gouellec, Enrique Lopez-Rodriguez, Fabien Louvet
https://arxiv.org/abs/2509.01796

Mapping Magnetic Fields from Clouds to Cores with PRIMAger
High-resolution, wide-area mapping of magnetic field geometries within molecular clouds, and the star-forming filaments and cores within them, is crucial in order to understand the role of magnetic fields in the star formation process. We therefore propose an unbiased survey of star-forming molecular clouds within 0.5 kpc of the Earth in polarized light with the PRIMAger Polarimetry Imager. We will map magnetic fields over entire molecular clouds at linear resolutions of $\sim10^{-3}-10^{-2}$ p…

Gliding microtubules exhibit tunable collective rotation driven by chiral active forces
Madhuvanthi Guruprasad Athani, Nathan Prouse, Niranjan Sarpangala, Patrick Noerr, Guillaume Schiano-Lomoriello, Ankush Gargeshwari Kumar, Fereshteh L. Memarian, Jeremie Gaillard, Laurent Blanchoin, Linda S. Hirst, Kinjal Dasbiswas, Ajay Gopinathan, Ond\v{r}ej Ku\v{c}era, Daniel A. Beller

Gliding microtubules exhibit tunable collective rotation driven by chiral active forces
How chirality propagates across scales remains an open question in many biological and synthetic systems. An especially clear manifestation of this propagation is found in in vitro gliding assays of cytoskeletal filaments on surfaces, driven by molecular motors. These assays have become model systems of active matter dynamics, as they spontaneously organize into diverse dynamical states, including collective motions with chiral rotation. However, the microscopic mechanisms underlying these chir…

Galaxy Group Spin Alignment with Cosmic Filament in the TNG Simulation
Wei Wang, Peng Wang, Yu Rong, Hao-da Wang, Xiao-xiao Tang
https://arxiv.org/abs/2508.20494 https://…

Galaxy Group Spin Alignment with Cosmic Filament in the TNG Simulation
We investigate the alignment between the spin vectors of galaxy groups and the axes of their nearest cosmic filaments using the TNG300-1 cosmological hydrodynamical simulation. By systematically analyzing a large sample of groups, we find a robust perpendicular alignment between group spin and filament orientation. Among all examined properties, only group mass and the distance to the nearest filament significantly affect the strength of this alignment: more massive groups and those closer to f…

Origin of the ~150 kpc radio filament in galaxy ESO 137-006
Toushif Alam, Kunal P. Mooley, Kartick C. Sarkar
https://arxiv.org/abs/2507.23026 https://arxiv…

Origin of the ~150 kpc radio filament in galaxy ESO 137-006
Sensitive wide-field radio surveys have started uncovering many filamentary structures associated with the jets and lobes of radio galaxies, radio relics in galaxy clusters, and tailed galaxies. Although limited theoretical investigations on the origin of the filamentary structures have associated these filaments with astrophysical shocks and interactions with intracluster magneto-ionic media, more quantitative studies are needed to ascertain their precise nature and origin. Recent MeerKAT obse…

The mechanics of disclination emergence in 3D active nematics
Yingyou Ma, Christopher Amey, Aparna Baskaran, Michael F. Hagan
https://arxiv.org/abs/2506.22785

The mechanics of disclination emergence in 3D active nematics
The spontaneous creation of disclinations is a defining characteristic of active nematics, which is rarely observed in equilibrium systems or other active matter systems. Thus, understanding the mechanics of disclinations is crucial for developing reliable continuum theories and practical applications. In this work, we explore this intrinsic mechanics by performing large-scale 3D simulations of a particle-based model of active semiflexible filaments. We investigate the effects of filament stiff…