Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo

Details Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo

2004-09-14

arxiv.org/abs/astro-ph/0409342v3

Mon.Not.Roy.Astron.Soc. 360 (2005) 1231-1243

Astronomy and Astrophysics

Astrophysics

13 pages; changed content; accepted version

Scientific paper

10.1111/j.1365-2966.2005.09116.x

The abundance stratification in the ejecta of the normal Type Ia supernova 2002bo is derived by fitting a series of spectra obtained at close time intervals. A Monte Carlo code, modified to include abundance stratification, is used to compute synthetic spectra at 13 epochs in the photospheric phase, starting 13d before B maximum. A description of the abundance distribution above 7600 km/s is thus obtained. Abundances in deeper layers, down to zero velocity, are derived from models of two nebular-phase spectra. Elements synthesized in different stages of burning are significantly, but not completely, mixed in the ejecta. A total 56Ni mass of 0.52M_sun is derived. Evidence for intermediate-mass elements at high velocities (> 18 000 km/s) is found, most clearly in Si II 6355A, in Ca II H&K, and in the Ca II infrared triplet. Carbon lines are not seen at any velocity, with possible implications for the progenitor/explosion scenario. A synthetic bolometric light curve computed using the inferred abundance distribution is in very good agreement with the observed one, providing an independent check. In particular, the fast rise of the light curve is reproduced very well. This is due to outward mixing of 56Ni, which is clearly well determined by the spectroscopic modelling.

Affiliated with

Also associated with

No associations

Rating

Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo 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 Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abundance stratification in Type Ia supernovae - I. The case of SN 2002bo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-414957