4 papers
X-ray Analysis of Gamma-Ray Burst Flares and Underlying Afterglows: Insights into Origin of Flares
H. Dereli-Bégué, A. Pe'er, D. Bégué +2
Gamma-ray burst (GRB) X-ray light curves exhibit a variety of complex temporal structures, such as flares and plateaus. The origin of flares seen in many GRB early afterglows is st…
Modeling of the time-resolved spectral energy distribution of blazar OJ 287 from 2008 to 2023: a comprehensive multi-epoch study
G. Harutyunyan, N. Sahakyan, D. Bégué
We present a comprehensive analysis of the time-resolved spectral energy distributions (SEDs) of the blazar OJ 287 over a 15-year period (2008-2023), using multi-wavelength data. I…
Radiative cooling changes the dynamics of magnetically arrested disks
Akshay Singh, Damien Bégué, Asaf Pe'er
We studied magnetically arrested disks (MAD) around rotating black holes (BH), under the influence of radiative cooling. We introduce a critical value of the mass accretion rate $\…
Unraveling the Origins of GRB X-ray Plateaus through a Study of X-ray Flares
H. Dereli-Bégué, A. Pe'er, D. Bégué +1
The X-ray light curves of gamma-ray bursts (GRBs) display complex features, including plateaus and flares, that challenge theoretical models. Here, we study the properties of flare…