Zobrazeno 1 - 10
of 112 265
pro vyhledávání: '"High energy astrophysical phenomena"'
Composite asymmetric dark matter (ADM) is the framework that naturally explains the coincidence of the baryon density and the dark matter density of the Universe. Through a portal interaction sharing particle-antiparticle asymmetries in the Standard
Externí odkaz:
http://arxiv.org/abs/2412.15641
Autor:
Iwata, Kazuya, Maeda, Keiichi
Most previous efforts for hydrodynamic studies on detonation in the context of Type Ia supernovae did not take into account the scale of the cellular structure for a criterion in initiation, propagation, quenching, and the resolution requirement of d
Externí odkaz:
http://arxiv.org/abs/2412.15580
The very high-energy afterglow in GRB 221009A, known as the `Brightest Of All Time' (B.O.A.T.), has been thoroughly analyzed in previous studies. In this paper, we conducted a statistical analysis of the waiting time behavior of 172 TeV photons from
Externí odkaz:
http://arxiv.org/abs/2412.16052
Autor:
Caroff, S., Pfeifer, C., Bolmont, J., Terzić, T., Campoy-Ordaz, A., Kerszberg, D., Martinez, M., Pensec, U., Plard, C., Strišković, J., Wong, S.
The fact that the standard dispersion relation for photons in vacuum could be modified because of their interaction with the quantum nature of spacetime has been proposed more than two decades ago. A quantitative model [Jacob \& Piran, JCAP 01, 031 (
Externí odkaz:
http://arxiv.org/abs/2412.16048
Autor:
Stewart, Rachael, Younes, George, Harding, Alice, Wadiasingh, Zorawar, Baring, Matthew, Negro, Michela, Strohmayer, Tod, Ho, Wynn, Ng, Mason, Arzoumanian, Zaven, Thi, Hoa Dinh, Di Lalla, Niccolo', Enoto, Teruaki, Gendreau, Keith, Hu, Chin-Ping, van Kooten, Alex, Kouveliotou, Chryssa, McEwen, Alexander
We report on IXPE and NuSTAR observations that began forty days following the onset of the 2024 outburst of the magnetar 1E 1841-045, marking the first ever IXPE observation of a magnetar in an enhanced state. Our spectropolarimetric analysis indicat
Externí odkaz:
http://arxiv.org/abs/2412.16036
Autor:
Weitz, Melanie Joan
The Pierre Auger Observatory has detected downward terrestrial gamma-ray flashes (TGFs) with its Surface Detector. A key to understanding this high-energy radiation in thunderstorms is to combine such measurements with measurements of lightning proce
Externí odkaz:
http://arxiv.org/abs/2412.15972
Autor:
Volpe, M. Cristina
Core-collapse supernovae constitute a unique laboratory for particle physics and astrophysics. They are powerful neutrino sources of all flavors, emitting essentially all the gravitational binding energy through neutrinos, at the end of their life. I
Externí odkaz:
http://arxiv.org/abs/2412.15964
Autor:
Zhao, Q. C., Tao, L., Tsygankov, S. Sergey, Mushtukov, A. Alexander, Feng, H., Ge, M. Y., Li, H. C., Zhang, S. N., Zhang, L.
We present a detailed time-resolved and phase-resolved polarimetric analysis of the transient X-ray pulsar RX J0440.9+4431/LS V +44 17, using data from the Imaging X-ray Polarimetry Explorer (IXPE) during the 2023 giant outburst. We conducted a time-
Externí odkaz:
http://arxiv.org/abs/2412.15955
Publikováno v:
Phys. Rev. D 110, 124048 (2024)
We analyze the orbital dynamics of spherical test bodies in ``black hole surrounded by dark matter halo'' spherically symmetric spacetimes. When the test body pulsates periodically (such as a variable star), altering its quadrupole tensor, Melnikov's
Externí odkaz:
http://arxiv.org/abs/2412.15938
Parity-violating electron scattering experiments on $\rm ^{48}Ca$ (CREX) and $\rm ^{208}Pb$ (PREX-II) offer valuable insight into the isovector properties of finite nuclei, providing constraints for the density dependence of the nuclear equation of s
Externí odkaz:
http://arxiv.org/abs/2412.15936