Search for Surviving Companions in Type Ia Supernova Remnants: Revisiting the main-sequence star channels

Shiau-Jie Rau^1,2,3*, Kuo-Chuan Pan^1,2,3,4

¹Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
²Institute of Astronomy, National Tsing Hua University, Hsinchu, Taiwan
³Center for Informatics and Computation in Astronomy, National Tsing Hua University, Hsinchu, Taiwan
⁴National Center for Theoretical Sciences, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Shiau-Jie Rau, email:cherrymow@gapp.nthu.edu.tw

Recent theoretical and numerical studies of Type Ia supernova explosion within the single-degenerate scenario suggest that the non-degenerate companions could survive the supernova impact and could be luminous after the explosion. However, the surviving ex-companions are still not firmly detected in observations of nearby type Ia supernova remnants. In this project, we investigate the response of surviving companions via two-dimensional hydrodynamics simulations of supernova ejecta on binary companions and the subsequent long-term stellar evolution of surviving companions. We consider a wide range of possible hydrogen-rich companions and characterize the companion response systematically. Our results suggest that some of the single degenerate channels with a main-sequence star companion would favor a low mass (< 1M_⊙) companion in a close binary system at the onset of the explosion to explain the non-detection of surviving companions in nearby supernova remnants.

Keywords: hydrodynamics, binaries: close, methods: numerical, supernovae: general