How Special Is GRB 170817A?
Yue, Chuan1,2; Hu, Qian1,3; Zhang, Fu-Wen4; Liang, Yun-Feng1; Jin, Zhi-Ping1,5; Zou, Yuan-Chuan6; Fan, Yi-Zhong1,5; Wei, Da-Ming1,5

GRB 170817A is the first short gamma-ray burst (GRB) with direct detection of the gravitational-wave radiation and also the spectroscopically identified macronova emission (i.e., AT 2017gfo). The prompt emission of this burst, however, is underluminous in comparison with the other short GRBs with known redshift. In this work, we examine whether GRB 170817A is indeed unique. We first show that GRB 130603B/macronova may be the on-axis "analogs" of GRB 170817A/AT 2017gfo, and the extremely dim but long-lasting afterglow emission of GRB 170817A may suggest a low number density (similar to 10(-5) cm(-3)) of its circumburst medium and a structured outflow. We then discuss whether GRB 070923, GRB 080121, GRB 090417A, GRB 111005A, and GRB 170817A form a new group of very nearby underluminous GRBs originated from neutron star mergers. If the short events GRB 070923, GRB 080121, and GRB 090417A are indeed at a redshift of similar to 0.076, 0.046, 0.088, respectively, their isotropic energies of the prompt emission are similar to 10(47) erg and thus comparable to the other two events. The non-detection of optical counterparts of GRB 070923, GRB 080121, GRB 090417A, and GRB 111005A, however, strongly suggests that the macronovae from neutron star mergers are significantly diverse in luminosities or, alternatively, there is another origin channel (for instance, the white dwarf and black hole mergers). We finally suggest that GW170817/GRB 170817A are likely not alone and similar events will be detected by the upgraded/upcoming gravitational-wave detectors and the electromagnetic monitors.

Keywordgamma-ray burst: general gravitational waves
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000422978900003
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Document Type期刊论文
Corresponding AuthorZhang, Fu-Wen
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China
3.Nanjing Normal Univ, Dept Phys & Inst Theoret Phys, Nanjing 210046, Jiangsu, Peoples R China
4.Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China
5.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
6.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Yue, Chuan,Hu, Qian,Zhang, Fu-Wen,et al. How Special Is GRB 170817A?[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,853(1):6.
APA Yue, Chuan.,Hu, Qian.,Zhang, Fu-Wen.,Liang, Yun-Feng.,Jin, Zhi-Ping.,...&Wei, Da-Ming.(2018).How Special Is GRB 170817A?.ASTROPHYSICAL JOURNAL LETTERS,853(1),6.
MLA Yue, Chuan,et al."How Special Is GRB 170817A?".ASTROPHYSICAL JOURNAL LETTERS 853.1(2018):6.
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