Tootfinder

Analysis of shape and angular orientation parameters of velocity-dependent dark matter annihilation signals in Galactic Centers for FIRE simulations
Daniel McKeown
https://arxiv.org/abs/2506.16583

Analysis of shape and angular orientation parameters of velocity-dependent dark matter annihilation signals in Galactic Centers for FIRE simulations
We use FIRE-2 zoom cosmological simulations of Milky Way size galaxy halos to characterize the shape of the J-factor emission signal on the sky. We find that, at a fixed dJ/dΩ contour,the shape is well-fit by an ellipse, with semi-major axis Rmajor and semi-minor axis Rminor measured in degrees on the sky. We use least squares fitting to fit ellipses to the J-factor emission, viewed from the solar location. The ratio of minor to major axes (Rminor/Rmajor) allows us to characterize the shape of…

Modeling HMI observables for the study of solar oscillations
D. Fournier, N. M. Kostogryz, L. Gizon, J. Schou, V. Witzke, A. I. Shapiro, I. Milic
https://arxiv.org/abs/2507.13756 …

Modeling HMI observables for the study of solar oscillations
Context: Helioseismology aims to infer the properties of the solar interior by analyzing observations of acoustic oscillations. The interpretation of the helioseismic data is however complicated by the non-trivial relationship between helioseismic observables and the physical perturbations associated with acoustic modes, as well as by various instrumental effects. Aims: We aim to improve our understanding of the signature of acoustic modes measured in the Helioseismic and Magnetic Imager (HMI) …

The Energy Spectrum of Ultra-High Energy Cosmic Rays across Declinations $-90^\circ$ to $ 44.8^\circ$ as measured at the Pierre Auger Observatory
Collaboration, Halim, Abreu, Aglietta, Allekotte, Cheminant, Almela, Aloisio, Alvarez-Mu\~niz, Ambrosone, Yebra, Anastasi, Anchordoqui, Andrada, Dourado, Andringa, Apollonio, Aramo, Arnone, Vel\'azquez, Assis, Avila, Avocone, Bakalova, Barbato, Mocellin, Bellido, Berat, Bertaina, Bianciotto, Biermann, Binet, Bismark, Bister, Biteau, Blaze…

The Energy Spectrum of Ultra-High Energy Cosmic Rays across Declinations $-90^\circ$ to $+44.8^\circ$ as measured at the Pierre Auger Observatory
The energy spectrum of cosmic rays above 2.5 EeV has been measured across the declination range $-90^\circ \leqδ\leq +44.8^\circ$ using data from $\sim 310{,}000$ events accrued at the Pierre Auger Observatory from an exposure of $(104{,}900\pm 3{,}100)$ km$^2\,$sr$\,$yr. No significant variations of energy spectra with declination are observed, after allowing or not for non-uniformities across the sky arising from the well-established dipolar anisotropies in the arrival directions of ultra-hi…

Global $q$-dependent inverse transforms of intensity autocorrelation data
Tobias Eklund, Christina M. Tonauer, Felix Lehmk\"uhler, Katrin Amann-Winkel
https://arxiv.org/abs/2507.14106

Global $q$-dependent inverse transforms of intensity autocorrelation data
We present a new analysis approach for intensity autocorrelation data, as measured with dynamic light scattering and X-ray photon correlation spectroscopy. Our analysis generalizes the established CONTIN and MULTIQ methods by direct nonlinear modeling of the $g_2$ function, enabling decomposition of complex dynamics without a priori knowledge of experimental scaling factors. We describe the mathematical formulation, implementation details, and strategies for solution, as well as demonstrate dec…

Identification of Authoritative Nodes and Dismantling of Illicit Networks Using a Novel Metric for Measuring Strength of a Graph
Kartikeya Kansal, Arunabha Sen
https://arxiv.org/abs/2507.12711

Identification of Authoritative Nodes and Dismantling of Illicit Networks Using a Novel Metric for Measuring Strength of a Graph
Dismantling criminal networks or containing epidemics or misinformation through node removal is a well-studied problem. To evaluate the effectiveness of such efforts, one must measure the strength of the network before and after node removal. Process P1 is considered more effective than P2 if the strength of the residual network after removing k nodes via P1 is smaller than that from P2. This leads to the central question: How should network strength be measured? Existing metrics rely solely …

The optical constants and grain sizes of interstellar dust measured directly using the dust scattered x-ray halo of GRB 221009A
Albert Sneppen, Darach Watson
https://arxiv.org/abs/2506.12125

The optical constants and grain sizes of interstellar dust measured directly using the dust scattered x-ray halo of GRB 221009A
X-ray scattering is a powerful probe of the optical constants and grain size distribution of interstellar dust. Bright, transient sources are excellent tools for this, since they fade rapidly, leaving only the expanding scattered x-ray halo. Here, we analyse the dust-scattered x-ray halo data of the unprecedentedly bright $γ$-ray burst, GRB 221009A, using anomalous diffraction theory to measure the grain size distribution of dust in the Galaxy as well as the complex refractive index, $m$, and …

Understanding the rift between update rules in Evolutionary Graph Theory: The intrinsic death rate drives star graphs from amplifying to suppressing natural selection
Max Dew, Christopher E. Overton
https://arxiv.org/abs/2506.15528

Understanding the rift between update rules in Evolutionary Graph Theory: The intrinsic death rate drives star graphs from amplifying to suppressing natural selection
Evolutionary graph theory is the study of evolutionary dynamics in structured populations. A well-known problem in evolutionary graph theory is that the spread of mutation (measured by fixation probability) is impacted by the graph type chosen and the update rule. For example, the star graph is an amplifier of natural selection under the birth-death with fitness on birth (Bd) update rule but a suppressor of natural selection under the death-birth with fitness on birth (dB) update rule. A contin…

Online Regularized Learning Algorithms in RKHS with $\beta$- and $\phi$-Mixing Sequences
Priyanka Roy, Susanne Saminger-Platz
https://arxiv.org/abs/2507.05929

Online Regularized Learning Algorithms in RKHS with $β$- and $ϕ$-Mixing Sequences
In this paper, we study an online regularized learning algorithm in a reproducing kernel Hilbert spaces (RKHS) based on a class of dependent processes. We choose such a process where the degree of dependence is measured by mixing coefficients. As a representative example, we analyze a strictly stationary Markov chain, where the dependence structure is characterized by the \(ϕ\)- and \(β\)-mixing coefficients. Under these assumptions, we derive probabilistic upper bounds as well as convergence…

Sorry to see the FEMA head fired. He’s right, eliminating FEMA is a terrible idea. Just canceling “non-disaster” funding will harm Americans and not really save money. Each dollar spent in preparedness saves $6-13 in post-disaster recovery, depending on how it is measured. Well, if there were no disasters, we’d save money, but pretending climate change isn’t real won’t help there either. By the way, states already do a ton of disaster preparedness and management—FEMA is the central standardi…

Moduli space of Conformal Field Theories and non-commutative Riemannian geometry
Yan Soibelman
https://arxiv.org/abs/2506.00896 https://

Moduli space of Conformal Field Theories and non-commutative Riemannian geometry
We discuss the analogy between collapsing Conformal Field Theories and measured Gromov-Hausdorff limit of Riemannian manifolds with non-negative Ricci curvature. Motivated by this analogy we propose the notion of non-commutative (``quantum") Riemannian d-geometry. We explain how this structure is related to Connes's spectral triples in the case d=1. In the Appendix based on the unpublished joint work with Maxim Kontsevich we discuss deformation theory of Quantum Field Theories as well as an app…

This https://arxiv.org/abs/2309.05901 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCR_…

Concurrent Composition for Interactive Differential Privacy with Adaptive Privacy-Loss Parameters
In this paper, we study the concurrent composition of interactive mechanisms with adaptively chosen privacy-loss parameters. In this setting, the adversary can interleave queries to existing interactive mechanisms, as well as create new ones. We prove that every valid privacy filter and odometer for noninteractive mechanisms extends to the concurrent composition of interactive mechanisms if privacy loss is measured using $(ε, δ)$-DP, $f$-DP, or Rényi DP of fixed order. Our results offer stro…

Statistical microlocal analysis in two-dimensional X-ray CT
Anuj Abhishek, Alexander Katsevich, James W. Webber
https://arxiv.org/abs/2506.05113 https://…

Statistical microlocal analysis in two-dimensional X-ray CT
In many imaging applications it is important to assess how well the edges of the original object, $f$, are resolved in an image, $f^\text{rec}$, reconstructed from the measured data, $g$. In this paper we consider the case of image reconstruction in 2D X-ray Computed Tomography (CT). Let $f$ be a function describing the object being scanned, and $g=Rf + η$ be the Radon transform data in $\mathbb{R}^2$ corrupted by noise, $η$, and sampled with step size $\simε$. Conventional microlocal analys…

Evolutionary Map of the Universe: Detection and Analysis of the Shell Surrounding the Runaway Wolf-Rayet Star WR16
A. C. Bradley, M. D. Filipovi\'c, Z. J. Smeaton, H. Sano, Y. Fukui, C. Bordiu, S. Cichowolski, N. F. H. Tothill, R. Z. E. Alsaberi, F. Bufano, S. Dai, Y. A. Gordon, A. M. Hopkins, T. H. Jarrett, B. S. Koribalski, S. Lazarevi\'c, C. J. Riseley, G. Rowell, M. Sasaki, D. Uro\v{s}evi\'c, T. Vernstrom

Evolutionary Map of the Universe: Detection and Analysis of the Shell Surrounding the Runaway Wolf-Rayet Star WR16
We present the first radio--continuum detection of the circumstellar shell around the well-known WN8 type Wolf-Rayet star WR16 at 943.5\,MHz using the \ac{ASKAP} \ac{EMU} survey. At this frequency, the shell has a measured flux density of 72.2$\pm$7.2\,mJy. Using previous \ac{ATCA} measurements at 2.4, 4.8, and 8.64~GHz, as well as the \ac{EMU} observations of the star itself, we determine a spectral index of $α\,=\,+0.74\pm0.02$, indicating thermal emission. We propose that the shell and star…

The cosmic-ray sea explains the Galactic $\gamma$-ray and $\nu$ diffuse emissions from GeV to PeV
Pedro De La Torre Luque, Daniele Gaggero, Dario Grasso, Antonio Marinelli, Manuel Rocamora
https://arxiv.org/abs/2507.07083

The cosmic-ray sea explains the Galactic $γ$-ray and $ν$ diffuse emissions from GeV to PeV
The LHAASO collaboration has recently released the spectrum and the angular distribution of the gamma-ray Galactic diffuse emission from 1 TeV to 1 PeV measured with the Kilometer-2 Array (KM2A) and the Water Cherenkov Detector Array (WCDA). We show that those data are in remarkably good agreement with a set of pre-existing models that assume the emission to be produced by the Galactic population of cosmic rays if its spectral shape traces that measured by CALET, DAMPE as well as KASCADE at hig…

Energy-energy correlators in small and large systems
Beatrice Liang-Gilman (on behalf of the ALICE Collaboration)
https://arxiv.org/abs/2506.22692 https://…

Energy-energy correlators in small and large systems
Energy-energy correlators (EECs) provide a powerful tool to study the evolution of scattered partons into final-state hadrons. In these proceedings, a variety of energy correlator measurements performed by the ALICE collaboration are reported. The 2-point energy-energy correlator (EEC) is measured in inclusive jets and heavy-flavor jets in pp collisions, as well as in inclusive jets in p-Pb collisions. The 3-point energy correlator is also discussed, including prospects for its use in extractin…

This https://arxiv.org/abs/2505.08696 has been replaced.
initial toot: https://mastoxiv.page/@a…

Quantum confinement theory of ultra-thin films: electronic, thermal and superconducting properties
The miniaturization of electronic devices has led to the prominence, in technological applications, of ultra-thin films with a thickness ranging from a few tens of nanometers to just about 1-2 nanometers. While these materials are still effectively 3D in many respects, traditional theories as well as ab initio methods struggle to describe their properties as measured in experiments. In particular, standard approaches to quantum confinement rely on hard-wall boundary conditions, which neglect th…

Low-Luminosity Type IIP Supernovae from the Zwicky Transient Facility Census of the Local Universe. II: Lightcurve Analysis
Kaustav K. Das, Mansi M. Kasliwal, Jesper Sollerman, Christoffer Fremling, Takashi J. Moriya, K-Ryan Hinds, Daniel A. Perley, Eric C. Bellm, Tracy X. Chen, Evan P. O'Connor, Michael W. Coughlin, W. V. Jacobson-Galan, Anjasha Gangopadhyay, Matthew Graham, S. R. Kulkarni, Josiah Purdum, Nikhil Sarin, Steve Schulze, Avinash Singh, Daichi Tsuna, Avery Wold

Low-Luminosity Type IIP Supernovae from the Zwicky Transient Facility Census of the Local Universe. II: Lightcurve Analysis
The Zwicky Transient Facility Census of the Local Universe survey yielded a sample of 330 Type IIP supernovae (SNe) with well-constrained peak luminosities. In paper I (arXiv:2502.19493), we measured their luminosity function and volumetric rate. Here (paper II), we present the largest systematic study of lightcurve properties for Type IIP SNe from a volume-limited survey, analyzing a selected subset of 129 events, including 16 low-luminosity Type IIP (LLIIP) SNe with M${r,peak} \geq -16$ mag. …