The Influence of Host Galaxies in Type Ia Supernova Cosmology
Uddin,Syed A.1,2,3; Mould,Jeremy2,3; Lidman,Chris3,4; Ruhlmann-Kleider,Vanina5; Zhang,Bonnie R.3,6
Source PublicationThe Astrophysical Journal
AbstractAbstract 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.
Keyworddark energy galaxies: general supernovae: general
WOS IDIOP:0004-637X-848-1-aa8df7
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, Jiangshu, China;
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
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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).
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