Determination of Primordial Metallicity and Mixing in the Type IIP Supernova 1993W

Details Determination of Primordial Metallicity and Mixing in the Type IIP Supernova 1993W Determination of Primordial Metallicity and Mixing in the Type IIP Supernova 1993W

2002-12-03

arxiv.org/abs/astro-ph/0212071v1

Astrophys.J. 586 (2003) 1199-1210

Astronomy and Astrophysics

Astrophysics

30 pages, 4 Tables, 16 Figures (some color), submitted to ApJ

Scientific paper

10.1086/367888

We present the results of a large grid of synthetic spectra and compare them to early spectroscopic observations of SN 1993W. This supernova was discovered close to its explosion date and at a recession velocity of 5400 km/s is located in the Hubble flow. We focus here on two early spectra that were obtained approximately 5 and 9 days after explosion. We parameterize the outer supernova envelope as a power-law density profile in homologous expansion. In order to extract information on the value of the parameters a large number of models was required. We show that very early spectra combined with detailed models can provide constraints on the value of the power law index, the ratio of hydrogen to helium in the surface of the progenitor, the progenitor metallicity and the amount of radioactive nickel mixed into the outer envelope of the supernova. The spectral fits reproduce the observed spectra exceedingly well. The spectral results combined with the early photometry predict that the explosion date was 4.7 \pm 0.7 days before the first spectrum was obtained. The ability to obtain the metallicity from early spectra make SN IIP attractive probes of chemical evolution in the universe and by showing that we have the ability to pin down the parameters of the progenitor and mixing during the supernova explosion, it is likely to make SN IIP useful cosmological distance indicators which are at the same time complementary to SNe Ia.

Affiliated with

Also associated with

No associations

Rating

Determination of Primordial Metallicity and Mixing in the Type IIP Supernova 1993W 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 Determination of Primordial Metallicity and Mixing in the Type IIP Supernova 1993W, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of Primordial Metallicity and Mixing in the Type IIP Supernova 1993W will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-495747