The Lifetime of Type Ia Supernova Progenitors Deduced from the Chemical Evolution in the Solar Neighborhood

Details The Lifetime of Type Ia Supernova Progenitors Deduced from the Chemical Evolution in the Solar Neighborhood The Lifetime of Type Ia Supernova Progenitors Deduced from the Chemical Evolution in the Solar Neighborhood

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...462..266y&link_type=abstract

Astrophysical Journal v.462, p.266

Statistics

112

Galaxy: Abundances, Galaxy: Evolution, Stars: Evolution, Stars: Statistics, Stars: Supernovae: General

Scientific paper

Using the chemical evolution model which allows the material infall from outside the disk region, we have determined the lifetime tIa of Type Ia supernova progenitors and the timescale tin of the infall that simultaneously reproduce the major observational features in the solar neighborhood, such as the evolutionary change in [O/Fe] against [Fe/H] and the [Fe/H] abundance distribution function of long-lived stars. A full survey in the parameter space, including the linear and nonlinear relations between the star formation rate and the gas density, shows that a value of [Fe/H] at which the [0/Fe] break occurs is sensitive mostly to tIain. This decoupling enables a reliable determination of tIa from the [O/Fe] break almost independently of tinIa ˜1.5 Gyr from the observed [O/Fe] break at [Fe/H] ˜-1 and tin ˜5 Gyr from the observed paucity of long-lived stars below [Fe/H] ˜-1 in the solar neighborhood. We have furthermore examined what would happen if the lifetime of SN Ia progenitors has a range using some heuristic distribution functions of tIa. We conclude from extensive calculations that its range is strictly confined within tIa = 0.5-3 Gyr, otherwise it is ruled out by the data. In addition, comparing the 0 and Fe yields determined by the chemical evolution model with the supernova nucleosynthesis yields, we discuss the mass range of the IMF and the mass fraction of SN Ia progenitors which can be expressed in terms of the IMF slope index.

Affiliated with

Also associated with

No associations

Rating

The Lifetime of Type Ia Supernova Progenitors Deduced from the Chemical Evolution in the Solar Neighborhood 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 Lifetime of Type Ia Supernova Progenitors Deduced from the Chemical Evolution in the Solar Neighborhood, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Lifetime of Type Ia Supernova Progenitors Deduced from the Chemical Evolution in the Solar Neighborhood will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1356637