Evidence of Extended Emission in GRB 181123B and Other High-redshift Short GRBs

被引：20

作者：

Dichiara, S. ^{[1
,2
]}

Troja, E. ^{[1
,2
]}

Beniamini, P. ^{[3
,4
]}

O'Connor, B. ^{[1
,2
,5
,6
]}

Moss, M. ^{[2
,5
]}

Lien, A. Y. ^{[2
,7
]}

Ricci, R. ^{[8
,9
]}

Amati, L. ^{[10
]}

Ryan, G. ^{[1
,2
]}

Sakamoto, T. ^{[11
]}

机构：

[1] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[2] NASA, Astrophys Sci Div, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[3] CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA

[4] Open Univ Israel, Astrophys Res Ctr Open Univ ARCO, POB 808, IL-43537 Raanana, Israel

[5] George Washington Univ, Dept Phys, 725 21st St NW, Washington, DC 20052 USA

[6] George Washington Univ, Astron Phys & Stat Inst Sci APSIS, Washington, DC 20052 USA

[7] Univ Maryland, Dept Phys, 1000 Hilltop Circle, Baltimore, MD 21250 USA

[8] Ist Nazl Ric Metrol, I-10135 Turin, Italy

[9] INAF Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy

[10] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via P Gobetti 101, I-40129 Bologna, Italy

[11] Aoyama Gakuin Univ, Dept Phys & Math, Chuo Ku, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 2525258, Japan

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2021年 / 911卷 / 02期

基金：

美国国家航空航天局;

关键词：

GAMMA-RAY BURSTS; DELAY-TIME DISTRIBUTION; NEUTRON-STAR MERGERS; R-PROCESS ELEMENTS; HOST GALAXY; X-RAY; GRAVITATIONAL-WAVES; COMPLETE SAMPLE; BROAD-BAND; LIGHT CURVES;

D O I：

10.3847/2041-8213/abf562

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the high-energy properties of GRB 181123B, a short gamma-ray burst (sGRB) at redshift z approximate to 1.75. We show that, despite its nominal short duration with T (90) < 2 s, this burst displays evidence of a temporally extended emission (EE) at high energies and that the same trend is observed in the majority of sGRBs at z greater than or similar to 1. We discuss the impact of instrumental selection effects on the GRB classification, stressing that the measured T (90) is not an unambiguous indicator of the burst physical origin. By examining their environment (e.g., stellar mass, star formation, offset distribution), we find that these high-z sGRBs share many properties of long GRBs at a similar distance and are consistent with a short-lived progenitor system. If produced by compact binary mergers, these sGRBs with EE may be easier to localize at large distances and herald a larger population of sGRBs in the early universe.

引用

页数：11

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