The helium star donor channel for the progenitors of type Ia supernovae and their surviving companion stars

Details The helium star donor channel for the progenitors of type Ia supernovae and their surviving companion stars The helium star donor channel for the progenitors of type Ia supernovae and their surviving companion stars

2010-09-08

arxiv.org/abs/1009.1433v1

AIPC, 2010

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 5 figures, to appear in the proceedings of the conference "Binary Star Evolution: Mass Loss, Accretion, and Mergers"

Scientific paper

The nature of type Ia supernovae (SNe Ia) is still unclear. Employing Eggleton's stellar evolution code with the optically thick wind assumption, we systematically studied the He star donor channel of SNe Ia, in which a carbon-oxygen white dwarf accretes material from a He main-sequence star or a He subgiant to increase its mass to the Chandrasekhar mass. We mapped out the initial parameters for producing SNe Ia in the orbital period--secondary mass plane for various WD masses from this channel. According to a detailed binary population synthesis approach, we find that this channel can produce SNe Ia with short delay times (~100Myr) implied by recent observations. We obtained many properties of the surviving companions of this channel after SN explosion, which can be verified by future observations. We also find that the surviving companions from the SN explosion scenario have a high spatial velocity (>400km/s), which could be an alternative origin for hypervelocity stars (HVSs), especially for HVSs such as US 708.

Affiliated with

Also associated with

No associations

Rating

The helium star donor channel for the progenitors of type Ia supernovae and their surviving companion stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The helium star donor channel for the progenitors of type Ia supernovae and their surviving companion stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The helium star donor channel for the progenitors of type Ia supernovae and their surviving companion stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-31574