Chromatic Afterglow of GRB 200829A

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astronomy Letters-A Journal of Astronomy and Space Astrophysics Pub Date : 2023-07-18 DOI:10.1134/S1063773723030052

N. S. Pankov, A. S. Pozanenko, P. Yu. Minaev, S. O. Belkin, A. A. Volnova, I. V. Reva, A. V. Serebryanskii, M. A. Krugov, S. A. Naroenkov, A. O. Novichonok, A. A. Zhornichenko, V. V. Rumyantsev, K. A. Antonyuk, Sh. A. Egamberdiev, O. A. Burkhonov, E. V. Klunko, A. S. Moskvitin, I. E. Molotov, R. Ya. Inasaridze

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引用次数: 0

Abstract

We present the results of our analysis of multiwavelength observations for the long gamma-ray burst GRB 200829A. The burst redshift \(z\approx 1.29\pm 0.04\) has been determined photometrically at the afterglow phase. In gamma rays the event is one of the brightest (in isotropic equivalent), \(E_{\textrm{iso}}\gtrsim 10^{54}\) erg. The multicolor light curve of the GRB 200829A afterglow is characterized by chromatic behavior and the presence of a plateau gradually transitioning into a power-law decay that can also be interpreted as a quasi-synchronous inhomogeneity (flare). We assume that the presence of a chromatic inhomogeneity in the early afterglow is consistent with the model of a structured jet.

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GRB 200829A的彩色余辉

我们给出了对GRB 200829A长伽马射线暴的多波长观测结果的分析。在余辉阶段用光度法测定了爆发红移（z约1.29μm 0.04）。在伽马射线中，该事件是最亮的（各向同性等效）事件之一，\（E_｛\textrm｛iso｝｝\gtrsim 10^｛54｝\）erg。GRB 200829A余辉的多色光曲线的特征是颜色行为和平台的存在，该平台逐渐转变为幂律衰减，也可以被解释为准同步不均匀性（耀斑）。我们假设早期余辉中存在的颜色不均匀性与结构喷流的模型一致。

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来源期刊

Astronomy Letters-A Journal of Astronomy and Space Astrophysics 地学天文-天文与天体物理

CiteScore

1.70

自引率

22.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Astronomy Letters is an international peer reviewed journal that publishes the results of original research on all aspects of modern astronomy and astrophysics including high energy astrophysics, cosmology, space astronomy, theoretical astrophysics, radio astronomy, extragalactic astronomy, stellar astronomy, and investigation of the Solar system.