Dependence of low redshift Type Ia Supernovae luminosities on host galaxies

作     者：Wen-Ke Liang Jian-Cheng Wang 

作者机构：National Astronomical Observatories/Yunnan Observatory Chinese Academy of Sciences Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences University of Chinese Academy of Sciences 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2013年第13卷第9期

页      面：1087-1096页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：financial support from the National Basic Research Program of China (973 Program 2009CB824800) the National Natural Science Foundation of China (Grant Nos. 11133006 11163006 and 11173054) the Policy Research Program of Chinese Academy of Sciences (KJCX2-YW-T24) 

主　　题：supernovae: general    distance scale    galaxies: classification 

摘      要：We study the relation between Type Ia Supernovae （SNe Ia） and properties of their host galaxies using a large sample with low redshift. By examining the Hubble residuals of the entire sample from the best-fit cosmology, we show that SNe Ia in passive hosts are brighter than those in star-forming hosts after light curve correction at the 2. 1σ confidence level. We find that SNe Ia in high luminosity hosts are brighter after light-curve correction at the 〉 3σ confidence level. We also find that SNe Ia in large galaxies are brighter after light-curve correction at the ≥2σ confidence level. We demonstrate that the residuals depend linearly on host luminosity at a confidence of 4or or host size at a confidence of 3.3σ.