Tootfinder

Das fehlende Puzzleteil für Passkeys: Apple stellt Exportfunktion in Aussicht
Passkeys sind bislang in Silos gefangen, das schreckt ab. iOS 26 & Co. liefern eine standardisierte Exportfunktion nach – auch für Passwörter.

Protostellar disks in their natural habitat -- the formation of protostars and their accretion disks in the turbulent and magnetized interstellar medium
Alexander C. Mayer, Thorsten Naab, Paola Caselli, Alexei V. Ivlev, Tommaso Grassi, Oliver Zier, R\"udiger Pakmor, Stefanie Walch, Volker Springel
https://arxiv.org/abs/2506…

Protostellar disks in their natural habitat -- the formation of protostars and their accretion disks in the turbulent and magnetized interstellar medium
We present simulations of the supernova-driven turbulent interstellar medium (ISM) in a simulation domain of volume $(256\,{\rm pc})^3$ within which we resolve the formation of protostellar accretion disks and their stellar cores to spatial scales of $\sim 10^{-4}$ au, using the moving-mesh code {\small AREPO}. We perform simulations with no magnetic fields, ideal magnetohydrodynamics (MHD) and ambipolar diffusion, and compare the resulting first Larson cores and their associated structures, in…

Check out my new post on #HealOurCulture: Frederick Douglass on White Evangelicals
https://healourculture.org/2025/06/20/frederick-douglass-on-white-evangelicals…

Fermi-GBM Observations of GRB 230307A: An Exceptionally Bright Long-Duration Gamma-ray Burst with an Associated Kilonova
S. Dalessi, P. Veres, C. M. Hui, S. Bala, S. Lesage, M. S. Briggs, A. Goldstein, E. Burns, C. A. Wilson-Hodge, C. Fletcher, O. J. Roberts, P. N. Bhat, E. Bissaldi, W. H. Cleveland, M. M. Giles, M. Godwin, R. Hamburg, B. A. Hristov, D. Kocevski, B. Mailyan, C. Malacaria, O. Mukherjee, L. Scotton, A. von Kienlin, J. Wood

Fermi-GBM Observations of GRB 230307A: An Exceptionally Bright Long-Duration Gamma-ray Burst with an Associated Kilonova
On March 7th, 2023 the \textit{Fermi} Gamma-ray Burst Monitor observed the second highest fluence gamma-ray burst (GRB) ever, GRB~230307A. With a duration beyond 100~s, GRB~230307A contains a multitude of rapidly-varying peaks, and was so bright it caused instrumental effects in the GBM detectors. The high fluence of this burst, (6.02 $\pm$ 0.02)$\times$10$^{-3}$ erg cm$^{-2}$, prompted rapid follow-up across the electro magnetic spectrum including the discovery of an associated kilonova. GRB~2…

Topological Conservation Laws in Magnetohydrodynamics on Higher-Dimensional Riemannian Manifolds
Naoki Sato, Ken Abe, Michio Yamada
https://arxiv.org/abs/2506.13251

Topological Conservation Laws in Magnetohydrodynamics on Higher-Dimensional Riemannian Manifolds
Are conservation laws such as fluid enstrophy, fluid helicity, or magnetic helicity inherently tied to the geometry of Euclidean space or the dimensionality of a fluid system? In this work, we first derive the equations of ideal magnetohydrodynamics (MHD) on a general Riemannian manifold. We then demonstrate that the associated conservation laws arise not from the flatness of the metric, but rather from the intrinsic mathematical structure of the governing equations. Moreover, we demonstrate th…

Distinguishing features of longitudinal magnetoconductivity for a Rarita-Schwinger-Weyl node
Ipsita Mandal
https://arxiv.org/abs/2506.12380 https://…

Distinguishing features of longitudinal magnetoconductivity for a Rarita-Schwinger-Weyl node
The band-degeneracy points in the Brillouin zones of chiral crystals exist in multiple avatars, with the high-symmetry points being able to host multifold nodes of distinct characters. A class of such crystals, assisted by the spin-orbit coupling, harbours fourfold degeneracy in the form of Rarita-Schwinger-Weyl node (RSWN) at the $Γ$-point. Our aim is to explore the nature of longitudinal magnetoconductivity, arising from applying collinear electric and magnetic fields, for such systems. Adju…

Friedensaktivist Hamza Howidy, aus #Gaza nach Deutschland geflohen, soll abgeschoben werden. Es gibt eine Petition:
https://www.openpetition.de/petition/onlin

Hamza Howidy muss bleiben! - Online petition
[English below] Der Friedensaktivist Hamza Howidy sah sich im August 2023 gezwungen, aus dem Gazastreifen über Ägypten und Griechenland nach Deutschland zu fliehen. In Gaza war es ihm als erklärtem Gegner der Hamas nicht möglich, einer Arbeit nachzugehen, da Arbeitsstellen vorrangig an Anhänger der Hamas vergeben wurden. Doch darüber hinaus wurde Hamza von der Hamas, die international als Terrororganisation eingestuft ist, schwer misshandelt und gefoltert. Unter diesen lebensbedrohlichen …

Crystal field tuned spin-flip luminescence in NiPS3
L\'eonard Schue, Nashra Pistawala, Hebatalla Elnaggar, Yannick Klein, Christophe Bellin, Johan Biscaras, Fausto Sirotti, Yves Lassailly, Fabian Cadiz, Luminita Harnagea, Abhay Shukla
https://arxiv.org/abs/2506.13381

Crystal field tuned spin-flip luminescence in NiPS3
Layered magnetic materials potentially hold the key to future applications based on optical control and manipulation of magnetism. NiPS3, a prototype member of this family, is antiferromagnetic below 155 K and exhibits sharp photoluminescence associated to a transition between a triplet ground state and a singlet excited state. The nature of the luminescent transition is a matter of current debate and so is an eventual fundamental link of this excitation to magnetism. Here we provide answers th…

On the Fast-radio-burst-associated X-ray Bursts: Inverse Compton Scattering of Radio Photons by an Extreme Pair Flow During Magnetosphere Activities
Yue Wu, Yuan-Pei Yang, Fa-Yin Wang, Zi-Gao Dai
https://arxiv.org/abs/2507.12405

On the Fast-radio-burst-associated X-ray Bursts: Inverse Compton Scattering of Radio Photons by an Extreme Pair Flow During Magnetosphere Activities
The Galactic fast radio burst (FRB) FRB 200428 was associated with a short X-ray burst (XRB) from the magnetar SGR J1935+2154 during one of its active phases. This FRB-associated XRB exhibits distinct properties compared to other typical XRBs, including a significantly higher cutoff energy and a steeper power-law index. Its recovered X-ray light curve shows a multiple-peak structure, with the time of arrival offset from that of the FRB. These unique features imply a special physical link betwee…

Intense Hard X-ray Emissions in C-class Flares: A Statistical Study with ASO-S/HXI Data
Changxue Chen, Yang Su, Wei Chen, Jingwei Li, Fu Yu, Weiqun Gan
https://arxiv.org/abs/2506.12294

Intense Hard X-ray Emissions in C-class Flares: A Statistical Study with ASO-S/HXI Data
In the standard model of solar eruptive events, coronal mass ejections (CMEs) and flares are associated with each other through magnetic reconnection initiated by erupting flux ropes. Observations also reveal an increasing association ratio between flares and CMEs with flare intensity. However, the fundamental relationship between flares and CMEs, and that between thermal and nonthermal processes, remains unknown. Here we investigate energetic C-class flares (ECFs) -- Geostationary Operational …