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The Diversity of Kilonova Emission in Short Gamma-Ray Bursts
Gompertz, B. P.1; Levan, A. J.1; Tanvir, N. R.2; Hjorth, J.3; Covino, S.4; Evans, P. A.2; Fruchter, A. S.5; Gonzalez-Fernandez, C.6; Jin, Z. P.7,8; Lyman, J. D.1; Oates, S. R.1; O'Brien, P. T.2; Wiersema, K.1
2018-06-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume860Issue:1Pages:10
Abstract

The historic first joint detection of both gravitational-wave and electromagnetic emission from a binary neutron star merger cemented the association between short gamma-ray bursts (SGRBs) and compact object mergers, as well as providing a well-sampled multi-wavelength light curve of a radioactive kilonova (KN) for the first time. Here, we compare the optical and near-infrared light curves of this KN, AT 2017gfo, to the counterparts of a sample of nearby (z < 0.5) SGRBs to characterize their diversity in terms of their brightness distribution. Although at similar epochs AT 2017gfo appears fainter than every SGRB-associated KN claimed so far, we find three bursts (GRBs 050509B, 061201, and 080905A) where, if the reported redshifts are correct, deep upper limits rule out the presence of a KN similar to AT 2017gfo by several magnitudes. Combined with the properties of previously claimed KNe in SGRBs this suggests considerable diversity in the properties of KN drawn from compact object mergers, despite the similar physical conditions that are expected in many NS-NS mergers. We find that observer angle alone is not able to explain this diversity, which is likely a product of the merger type (NS-NS versus NS-BH) and the detailed properties of the binary (mass ratio, spins etc.). Ultimately disentangling these properties should be possible through observations of SGRBs and gravitational-wave sources, providing direct measurements of heavy element enrichment throughout the universe.

Keywordgamma-ray burst: general gravitational waves nuclear reactions, nucleosynthesis, abundances stars: neutron
DOI10.3847/1538-4357/aac206
WOS KeywordNEUTRON-STAR MERGERS ; COMPACT OBJECT MERGERS ; SHORT-DURATION GRB ; HOST GALAXY ; R-PROCESS ; ELECTROMAGNETIC COUNTERPART ; MULTICOLOR OBSERVATIONS ; OPTICAL AFTERGLOWS ; EXTENDED EMISSION ; FORMING GALAXY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000435102000012
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/21962
Collection中国科学院紫金山天文台
Corresponding AuthorGompertz, B. P.
Affiliation1.Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
2.Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
3.Univ Copenhagen, Dark Cosmol Ctr, Niels Bohr Inst, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark
4.Osserv Astron Brera, INAF, Via E Bianchi 46, I-23807 Merate, LC, Italy
5.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
6.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
7.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
8.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Gompertz, B. P.,Levan, A. J.,Tanvir, N. R.,et al. The Diversity of Kilonova Emission in Short Gamma-Ray Bursts[J]. ASTROPHYSICAL JOURNAL,2018,860(1):10.
APA Gompertz, B. P..,Levan, A. J..,Tanvir, N. R..,Hjorth, J..,Covino, S..,...&Wiersema, K..(2018).The Diversity of Kilonova Emission in Short Gamma-Ray Bursts.ASTROPHYSICAL JOURNAL,860(1),10.
MLA Gompertz, B. P.,et al."The Diversity of Kilonova Emission in Short Gamma-Ray Bursts".ASTROPHYSICAL JOURNAL 860.1(2018):10.
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