Gamma-Ray Burst in Swift and Fermi Era

	Gamma-Ray Burst in Swift and Fermi Era
	Zheng, WeiKang 1; Wu, Xuefeng2 ; Sakamoto, Takanori 3; Urata, Yuji 4,5; Pandey, Shashi B.6
刊名	ADVANCES IN ASTRONOMY
	2015
页码	543624
英文摘要	We update gamma-ray burst (GRB) luminosity relations among certain spectral and light-curve features with 139 GRBs. The distance modulus of 82 GRBs at z > 1.4 can be calibrated with the sample at z <= 1.4 by using the cubic spline interpolation method from the Union2.1 Type Ia supernovae (SNe Ia) set. We investigate the joint constraints on the Cardassian expansion model and dark energy with 580 Union2.1 SNe Ia sample (z < 1.4) and 82 calibrated GRBs' data (1.4 < z <= 8.2). In Lambda CDM, we find that adding 82 high-z GRBs to 580 SNe Ia significantly improves the constraint on Omega(m)-Omega(Lambda) plane. In the Cardassian expansion model, the best fit is Omega(m) = 0.24(-0.15)(+0.15) and n = 0.16(-0.52)(+0.30) (1 sigma), which is consistent with the Lambda CDM cosmology (n = 0) in the 1 sigma confidence region. We also discuss two dark energy models in which the equation of state omega(z) is parameterized as omega(z) = omega(0) and omega(z) = omega(0) + omega(1)z/(1+z), respectively. Based on our analysis, we see that our universe at higher redshift up to z = 8.2 is consistent with the concordance model within 1 sigma confidence level.
学科主题	天文和天体物理
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
收录类别	SCI
语种	英语
WOS记录号	WOS:000360717200001
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/14898]
专题	紫金山天文台_南极天文中心
作者单位	1.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Aoyama Gakuin Univ, Dept Math & Phys, Sagamihara, Kanagawa 2525258, Japan 4.Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan 5.Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan 6.Aryabhatta Res Inst Observat Sci, Manora Peak 263129, Nainital, India
推荐引用方式 GB/T 7714	Zheng, WeiKang,Wu, Xuefeng,Sakamoto, Takanori,et al. Gamma-Ray Burst in Swift and Fermi Era[J]. ADVANCES IN ASTRONOMY,2015:543624.
APA	Zheng, WeiKang,Wu, Xuefeng,Sakamoto, Takanori,Urata, Yuji,&Pandey, Shashi B..(2015).Gamma-Ray Burst in Swift and Fermi Era.ADVANCES IN ASTRONOMY,543624.
MLA	Zheng, WeiKang,et al."Gamma-Ray Burst in Swift and Fermi Era".ADVANCES IN ASTRONOMY (2015):543624.