Companion stars of Type Ia supernovae and single low-mass white dwarfs

Abstract

Recent investigations of the WD + MS channel of Type Ia supernovae (SNe Ia) imply that this channel may be the main contribution to the old population (>1Gyr) of SNe Ia. In the WD + MS channel, the WD could accrete material from a main-sequence or a slightly evolved star until it reaches the Chandrasekhar mass limit. The companions in this channel would survive after SN explosion and show distinguishing properties. In this Letter, based on SN Ia production regions of the WD + MS channel and three formation channels of WD + MS systems, we performed a detailed binary population synthesis study to obtain the properties of the surviving companions. The properties can be verified by future observations. We find that the surviving companions of the old SNe Ia have a low mass, which provides a possible way to explain the formation of the population of single low-mass WDs (<0.45Msun).

5 pages, 5 figures, accepted for publication in MNRAS Letters

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Cited by in corpus (16)

• Progenitors of type Ia supernovae
• Type-Ia supernova rates and the progenitor problem, a review
• Impact of type ia supernova ejecta on binary companions in the single-degenerate scenario
• Mass-accreting white dwarfs and type Ia supernovae
• Producing type Iax supernovae from a specific class of helium-ignited WD explosions?
• Type Ia Single Degenerate Survivors Must Be Overluminous
• Evolution Of Post-Impact Remnant Helium Stars In Type Ia Supernova Remnants Within The Single-Degenerate Scenario
• The helium star donor channel for the progenitors of type Ia supernovae with different metallicities
• The rotation of surviving companion stars after type Ia supernova explosions in the WD+MS scenario
• On the evolution of rotating accreting white dwarfs and type Ia supernovae
• A likely candidate of type Ia supernova progenitors: the X-ray pulsating companion of the hot subdwarf HD 49798
• The progenitors of type Ia supernovae in the semidetached binaries with red giant donors
• Search for Surviving Companions of Progenitors of Young LMC Type Ia Supernova Remnants
• Discovery of four new EL CVn-type binaries in the Gaia eclipsing binaries
• A super-Eddington wind scenario for the progenitors of type Ia supernovae: binary population synthesis calculations
• Three-dimensional simulations of accretion flow in the progenitor of Tycho's supernova