Results 21 to 30 of about 2,282,133 (297)

Dark gamma-ray bursts [PDF]

Physical Review D, 2017
Many theories of dark matter (DM) predict that DM particles can be captured by stars via scattering on ordinary matter. They subsequently condense into a DM core close to the center of the star and eventually annihilate. In this work, we trace DM capture and annihilation rates throughout the life of a massive star and show that this evolution ...
Brdar, Vedran, Kopp, Joachim, Liu, Jia
openaire   +2 more sources

Supernovae and Gamma-Ray Bursts [PDF]

Chinese Journal of Astronomy and Astrophysics, 2006
I review the observational status of the Supernova/Gamma-Ray Burst (GRB) connection. Available data suggest that Supernovae (SNe) associated with GRBs form an heterogeneous class of objects including bright and faint hypernovae (Hyp) and perhaps also `standard' Ib/c events.
Paolo A. Mazzali, Ken'ichi Nomoto, Keiichi Maeda, Jinsong Deng, Stefan Immler, Kurt Weiler   +5 more
openaire   +4 more sources

Afterglow Polarization from Off-axis Gamma-Ray Burst Jets

The Astrophysical Journal, 2023
As we further our studies on gamma-ray bursts (GRBs), via both theoretical models and observational tools, more and more options begin to open for exploration of its physical properties.
A. C. Caligula do E. S. Pedreira, N. Fraija, A. Galvan-Gamez, B. Betancourt Kamenetskaia, P. Veres, M. G. Dainotti, S. Dichiara, R. L. Becerra   +7 more
doaj   +1 more source

The First JWST Spectrum of a GRB Afterglow: No Bright Supernova in Observations of the Brightest GRB of all Time, GRB 221009A

The Astrophysical Journal Letters, 2023
We present James Webb Space Telescope (JWST) and Hubble Space Telescope (HST) observations of the afterglow of GRB 221009A, the brightest gamma-ray burst (GRB) ever observed.
A. J. Levan, G. P. Lamb, B. Schneider, J. Hjorth, T. Zafar, A. de Ugarte Postigo, B. Sargent, S. E. Mullally, L. Izzo, P. D’Avanzo, E. Burns, J. F. Agüí Fernández, T. Barclay, M. G. Bernardini, K. Bhirombhakdi, M. Bremer, R. Brivio, S. Campana, A. A. Chrimes, V. D’Elia, M. Della Valle, M. De Pasquale, M. Ferro, W. Fong, A. S. Fruchter, J. P. U. Fynbo, N. Gaspari, B. P. Gompertz, D. H. Hartmann, C. L. Hedges, K. E. Heintz, K. Hotokezaka, P. Jakobsson, D. A. Kann, J. A. Kennea, T. Laskar, E. Le Floc’h, D. B. Malesani, A. Melandri, B. D. Metzger, S. R. Oates, E. Pian, S. Piranomonte, G. Pugliese, J. L. Racusin, J. C. Rastinejad, M. E. Ravasio, A. Rossi, A. Saccardi, R. Salvaterra, B. Sbarufatti, R. L. C. Starling, N. R. Tanvir, C. C. Thöne, A. J. van der Horst, S. D. Vergani, D. Watson, K. Wiersema, R. A. M. J. Wijers, Dong Xu   +59 more
doaj   +1 more source

GAMMA-RAY BURSTS [PDF]

Particles, Strings and Cosmology (PASCOS 99), 2000
Ultra-high-energy, >10^19 eV, cosmic-ray and high energy, ~10^14 eV, neutrino production in GRBs is discussed in the light of recent GRB and cosmic-ray observations. Emphasis is put on model predictions that can be tested with operating and planned cosmic-ray and neutrino detectors, and on the prospects of testing for neutrino properties.
openaire   +2 more sources

Energetics of Gamma‐Ray Bursts [PDF]

The Astrophysical Journal, 2001
Submitted to ...
Jimenez, Raul, Band, David, Piran, Tsvi
openaire   +2 more sources

A Remarkable Angular Distribution of the Intermediate Subclass of Gamma‐Ray Bursts [PDF]

, 2000
We develop a method of testing the null hypothesis of intrinsic randomness in the angular distribution of gamma-ray bursts collected in the Current BATSE Catalog.
Bagoly, Zsolt, Vavrek, Roland, Mészáros A, Balázs, Lajos György, Balázs LG, Mészáros, Attila, Vavrek R, Bagoly Zs, Horváth, István, Horváth I, Vavrek, R, Balázs, LG, Bagoly, Zs, Horváth, I, Mészáros, A   +14 more
core   +1 more source

Very-high-energy Gamma-Ray Afterglows of GRB 201015A and GRB 201216C

The Astrophysical Journal, 2023
Gamma-ray bursts (GRBs) 201015A and 201216C are valuable cases where very-high-energy (VHE) gamma-ray afterglows have been detected. By analyzing their prompt emission data, we find that GRB 201216C is an extremely energetic, long GRB with a hard gamma ...
Lu-Lu Zhang, Jia Ren, Yun Wang, En-Wei Liang   +3 more
doaj   +1 more source

Simulations of X-ray bursts and superbursts [PDF]

, 2015
Observations of neutron star in binary systems provide powerful constrains on the physics at the surface of neutron stars. During the accretion of matter from the companion star, periodic nuclear explosion are triggered in the outer layers of the neutron
Fehlmann, Sofie
core   +1 more source

A Broken “α–intensity” Relation Caused by the Evolving Photosphere Emission and the Nature of the Extraordinarily Bright GRB 230307A

The Astrophysical Journal Letters, 2023
GRB 230307A is one of the brightest gamma-ray bursts detected so far. With the excellent observation of GRB 230307A by the Fermi Gamma-ray Burst Monitor, we can reveal the details of prompt emission evolution.
Yun Wang, Zi-Qing Xia, Tian-Ci Zheng, Jia Ren, Yi-Zhong Fan   +4 more
doaj   +1 more source