Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Uhm, Z. Lucas"'
Autor:
Tak, Donggeun, Uhm, Z. Lucas, Paek, Gregory S. H., Im, Myungshin, Arimoto, Makoto, Choi, Hyeonho, Kim, Sophia, Omodei, Nicola, Racusin, Judith, Urata, Yuji, Zhang, Bing
Gamma-ray bursts (GRBs) are the most energetic explosions in the universe, and their afterglow emission provides an opportunity to probe the physics of relativistic shock waves in an extreme environment. Several key pieces for completing the picture
Externí odkaz:
http://arxiv.org/abs/2411.12106
Publikováno v:
ApJ 967 54 (2024)
A kilonova, the electromagnetic emission produced by compact binary mergers, is formed through a delicate interplay of physical processes, involving r-process nucleosynthesis and interactions between heavy elements and photons through radiative trans
Externí odkaz:
http://arxiv.org/abs/2402.05471
Publikováno v:
ApJ 958 121 (2023)
A kilonova is a short-lived explosive event in the universe, resulting from the merger of two compact objects. Despite its importance as a primary source of heavy elements through r-process nucleosynthesis, its nature is not well understood, due to i
Externí odkaz:
http://arxiv.org/abs/2310.15608
Autor:
Tak, Donggeun, Uhm, Z. Lucas, Racusin, Judith, Zhang, Bing, Guiriec, Sylvain, Kocevski, Daniel, Zhang, Bin-Bin, McEnery, Julie
We perform a detailed analysis on broad pulses in bright Gamma-ray bursts (GRBs) to understand the evolution of GRB broad pulses. Using the temporal and spectral properties, we test the high latitude emission (HLE) scenario in the decaying phase of b
Externí odkaz:
http://arxiv.org/abs/2212.07095
Autor:
Uhm, Z. Lucas, Tak, Donggeun, Zhang, Bing, Racusin, Judith, Kocevski, Daniel, Guiriec, Sylvain, Zhang, Bin-Bin, McEnery, Julie
The physical mechanism of gamma-ray bursts (GRBs) remains elusive. One of the difficulties in nailing down their physical mechanism comes from the fact that there has been no clear observational evidence on how far from the central engine the prompt
Externí odkaz:
http://arxiv.org/abs/2212.07094
GRB 131108A is a bright long Gamma-Ray Burst (GRB) detected by the Large Area Telescope and the Gamma-ray Burst Monitor on board the Fermi Gamma-ray Space Telescope. Dedicated temporal and spectral analyses reveal three $\gamma$-ray flares dominating
Externí odkaz:
http://arxiv.org/abs/1911.04642
Autor:
Tak, Donggeun, Guiriec, Sylvain, Uhm, Z. Lucas, Yassine, Manal, Omodei, Nicola, McEnery, Julie
Publikováno v:
ApJ,vol. 876, p. 76, May 2019
GRB 160709A is one of the few bright short gamma-ray bursts detected by both the Gamma-ray Burst Monitor and the Large Area Telescope on board the $Fermi$ $Gamma$-$ray$ $Space$ $Telescope$. The $\gamma$-ray prompt emission of GRB 160709A is adequatel
Externí odkaz:
http://arxiv.org/abs/1910.05420
Autor:
Tak, Donggeun, Omodei, Nicola, Uhm, Z. Lucas, Racusin, Judith, Asano, Katsuaki, McEnery, Julie
Publikováno v:
ApJ, vol. 883, p. 134, Sep 2019
The synchrotron external shock model predicts the evolution of the spectral ($\beta$) and temporal ($\alpha$) indices during the gamma-ray burst (GRB) afterglow for different environmental density profiles, electron spectral indices, electron cooling
Externí odkaz:
http://arxiv.org/abs/1910.05418
Autor:
Li, Liang, Geng, Jin-Jun, Meng, Yan-Zhi, Wu, Xue-Feng, Huang, Yong-Feng, Wang, Yu, Moradi, Rahim, Uhm, Z. Lucas, Zhang, Bing
The characteristics of the spectral evolution of the prompt emission of gamma-ray bursts (GRBs), which are closely related to the radiation mechanism (synchrotron or photosphere), are still an unsolved subject. Here, by performing the detailed time-r
Externí odkaz:
http://arxiv.org/abs/1901.04925
The prompt emission phase of gamma-ray bursts (GRBs) exhibits two distinct patterns of the peak-energy ($E_p$) evolution, i.e., time-resolved spectral analyses of $\nu F_{\nu}$ spectra of broad pulses reveal (1) "hard-to-soft" and (2) "flux-tracking"
Externí odkaz:
http://arxiv.org/abs/1801.09183