The Influence of Host Galaxies in Type Ia Supernova Cosmology

doi:10.3847/1538-4357/aa8df7

	The Influence of Host Galaxies in Type Ia Supernova Cosmology
	Uddin,Syed A.1,2,3; Mould,Jeremy 2,3; Lidman,Chris 3,4; Ruhlmann-Kleider,Vanina 5; Zhang,Bonnie R.3,6
刊名	The Astrophysical Journal
	2017-10-11
卷号	848 期号:1
关键词	dark energy galaxies: general supernovae: general
ISSN号	0004-637X
DOI	10.3847/1538-4357/aa8df7
英文摘要	Abstract We use a sample of 1338 spectroscopically confirmed and photometrically classified Type Ia supernovae (SNe Ia) sourced from Carnegie Supernova Project, Center for Astrophysics Supernova Survey, Sloan Digital Sky Survey-II, and SuperNova Legacy Survey SN samples to examine the relationships between SNe Ia and the galaxies that host them. Our results provide confirmation with improved statistical significance that SNe Ia, after standardization, are on average more luminous in massive hosts (significance?>5σ), and decline more rapidly in massive hosts (significance?>9σ) and in hosts with low specific star formation rates (significance?>8σ). We study the variation of these relationships with redshift and detect no evolution. We split SNe Ia into pairs of subsets that are based on the properties of the hosts and fit cosmological models to each subset. Including both systematic and statistical uncertainties, we do not find any significant shift in the best-fit cosmological parameters between the subsets. Among different SN Ia subsets, we find that SNe Ia in hosts with high specific star formation rates have the least intrinsic scatter (σint = 0.08 ± 0.01) in luminosity after standardization.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-848-1-AA8DF7
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22766]
专题	中国科学院紫金山天文台
作者单位	1.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, Jiangshu, China; saushuvo@gmail.com 2.Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Melbourne, VIC, Australia 3.Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia 4.Australian Astronomical Observatory, North Ryde, NSW, Australia 5.CEA, Centre de Saclay, Irfu/SPP, F-91191 Gif-sur-Yvette, Paris, France 6.Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia
推荐引用方式 GB/T 7714	Uddin,Syed A.,Mould,Jeremy,Lidman,Chris,et al. The Influence of Host Galaxies in Type Ia Supernova Cosmology[J]. The Astrophysical Journal,2017,848(1).
APA	Uddin,Syed A.,Mould,Jeremy,Lidman,Chris,Ruhlmann-Kleider,Vanina,&Zhang,Bonnie R..(2017).The Influence of Host Galaxies in Type Ia Supernova Cosmology.The Astrophysical Journal,848(1).
MLA	Uddin,Syed A.,et al."The Influence of Host Galaxies in Type Ia Supernova Cosmology".The Astrophysical Journal 848.1(2017).