The Redshift Dependence of the Radio Flux of Gamma-Ray Bursts and Their Host Galaxies

doi:10.3847/1538-4357/aadc62

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	The Redshift Dependence of the Radio Flux of Gamma-Ray Bursts and Their Host Galaxies
	Zhang, Z. B.1,2; Chandra, P.3; Huang, Y. F.4; Li, D.5,6
刊名	ASTROPHYSICAL JOURNAL
	2018-10-01
卷号	865 期号:2 页码:13
关键词	gamma-ray burst: general hydrodynamics methods: data analysis radio continuum: general
ISSN号	0004-637X
DOI	10.3847/1538-4357/aadc62
英文摘要	Using multiwavelength observations of radio afterglows, we confirm the hypothesis that the flux density of gamma-ray bursts (GRBs) at a fixed observing frequency is invariable when the distance of the GRBs increases, which means the detection rate will be approximately independent of redshift. We study this behavior theoretically and find that it can be well explained by the standard forward shock model involving a thin shell expanding in either a homogeneous interstellar medium (ISM) or a wind environment. We also found that short GRBs and supernova-associated GRBs, which are at relatively smaller distances, marginally match the flux-redshift relationship and they could be outliers. We rule out the assumption that the medium density evolves with redshift as n proportional to (1 + z)(4) from the current measurements of n and z for short and long GRBs. In addition, the possible dependence of host flux on the redshift is also investigated. We find that a similar redshift independence of the flux exists for host galaxies as well, which implies that the detection rate of radio hosts might also be independent of the redshift. It is also hinted that most radio hosts have spectral indices ranging from beta(h) similar or equal to -1 to 2.5 in statistics. Finally, we predict the detection rates of radio afterglows by next-generation radio telescopes such as the Five-hundred meter Aperture Spherical Telescope (FAST) and the Square Kilometer Array (SKA).
资助项目	National Key R&D Program of China[2017YFA0402600] ; National Natural Science Foundation of China[U1431126] ; National Natural Science Foundation of China[11873030] ; National Natural Science Foundation of China[11473012] ; National Natural Science Foundation of China[11690024] ; National Natural Science Foundation of China[11725313] ; CAS International Partnership Program[114A11KYSB20160008] ; Department of Science and Technology via SwarnaJayanti Fellowship Award[DST/SJF/PSA-01/2014-15]
WOS关键词	STAR-FORMATION ; LIGHT CURVES ; AFTERGLOWS ; PROGENITOR ; SUBMILLIMETER ; GRB-980703 ; EVOLUTION ; EMISSION ; MODELS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000445743300002
资助机构	National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Department of Science and Technology via SwarnaJayanti Fellowship Award ; Department of Science and Technology via SwarnaJayanti Fellowship Award ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Department of Science and Technology via SwarnaJayanti Fellowship Award ; Department of Science and Technology via SwarnaJayanti Fellowship Award ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Department of Science and Technology via SwarnaJayanti Fellowship Award ; Department of Science and Technology via SwarnaJayanti Fellowship Award ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Department of Science and Technology via SwarnaJayanti Fellowship Award ; Department of Science and Technology via SwarnaJayanti Fellowship Award
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/22896]
专题	中国科学院国家天文台
通讯作者	Zhang, Z. B.
作者单位	1.Qufu Normal Univ, Coll Phys & Engn, Qufu 273165, Peoples R China 2.Guizhou Univ, Coll Phys, Dept Phys, Guiyang 550025, Guizhou, Peoples R China 3.Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, POB 3, Pune 411007, Maharashtra, India 4.Nanjing Univ, Dept Astron, Nanjing 210023, Jiangsu, Peoples R China 5.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100020, Peoples R China 6.Chinese Acad Sci, CAS Key Lab FAST, NAOC, Beijing 100020, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Z. B.,Chandra, P.,Huang, Y. F.,et al. The Redshift Dependence of the Radio Flux of Gamma-Ray Bursts and Their Host Galaxies[J]. ASTROPHYSICAL JOURNAL,2018,865(2):13.
APA	Zhang, Z. B.,Chandra, P.,Huang, Y. F.,&Li, D..(2018).The Redshift Dependence of the Radio Flux of Gamma-Ray Bursts and Their Host Galaxies.ASTROPHYSICAL JOURNAL,865(2),13.
MLA	Zhang, Z. B.,et al."The Redshift Dependence of the Radio Flux of Gamma-Ray Bursts and Their Host Galaxies".ASTROPHYSICAL JOURNAL 865.2(2018):13.