The companion properties of SNe Ia from the single degenerate model  

作　　者：MENG XiangCun YANG WuMing 

机构地区：[1]School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China [2]Department of Astronomy, Beijing Normal University, Beijing 100875, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第12期2296-2300,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.11003003);the Project of Science and Technology from the Ministry of Education (Grant No.211102);the China Postdoctoral Science Foundation Funded Project (Grant No.20100480222)

摘　　要：Although Type Ia supernovae (SNe Ia) play very important roles in many astrophysical fields, the exact nature of the progenitors of SNe Ia is still unclear. At present, the single degenerate (SD) model is a very likely one. Following the comprehensive SD model developed by Meng & Yang (2010), we show the properties of SNe Ia companions at the moment of the supernova explosion. The results may provide help in searching for companion stars in supernova remnants. We compared our results with the companion candidate Tycho G of Tycho's supernova and found that integral properties of the star (mass, space velocity, radius, luminosity and effective temperature) are all consistent with those predicted from our SD model with the exception of the rotational velocity. If Tycho G was the companion star of Tycho's supernova, an interaction between supernova ejecta and the rotational companion might be a key factor to solve the confliction, and then it could be encouraged to do a detailed numerical simulation about the interaction.Although Type Ia supernovae （SNe Ia） play very important roles in many astrophysical fields, the exact nature of the progenitors of SNe Ia is still unclear. At present, the single degenerate （SD） model is a very likely one. Following the comprehensive SD model developed by Meng Yang （2010）, we show the properties of SNe Ia companions at the moment of the supernova explosion. The results may provide help in searching for companion stars in supernova remnants. We compared our results with the companion candidate Tycho G of Tycho’s supernova and found that integral properties of the star （mass, space velocity, radius, luminosity and effective temperature） are all consistent with those predicted from our SD model with the exception of the rotational velocity. If Tycho G was the companion star of Tycho’s supernova, an interaction between supernova ejecta and the rotational companion might be a key factor to solve the confliction, and then it could be encouraged to do a detailed numerical simulation about the interaction.

关 键 词：binaries： close stars： evolution supernovae： general white dwarfs 

分 类 号：P145.3[天文地球—天体物理] TP391.41[天文地球—天文学]