Evidence for a High-Velocity Carbon-rich Layer in the Type I[CLC]a[/CLC] SN 1990N
- 1 June 1997
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 481 (2) , L89-L92
- https://doi.org/10.1086/310660
Abstract
We use a parameterized spectrum-synthesis code to make a direct analysis of a high quality spectrum of the Type Ia SN 1990N that was obtained by Leibundgut et al. 14 days before the time of optical maximum. We suggest that the absorption feature observed near 6040 Å, which has been attributed to blueshifted λ6355 of Si II, actually was produced by blueshifted λ6580 of C II, in a high-velocity (v > 26, 000 km s-1) carbon-rich region. Implications for SN Ia explosion models are briefly discussed.Keywords
This publication has 35 references indexed in Scilit:
- Non-local thermodynamic equilibrium effects in modelling of Supernovae near maximum lightMonthly Notices of the Royal Astronomical Society, 1996
- Radiative transfer in the comoving frameMonthly Notices of the Royal Astronomical Society, 1996
- Thermal Instability and Pulsations of the Flame Front in White DwarfsThe Astrophysical Journal, 1995
- The delayed-detonation model of a type IA supernovae. 1: The deflagration phaseThe Astrophysical Journal, 1994
- The delayed-detonation model of Type IA supernovae. 2: The detonation phaseThe Astrophysical Journal, 1994
- On the relative frequencies of spectroscopically normal and peculiar type IA supernovaeThe Astronomical Journal, 1993
- The subluminous, spectroscopically peculiar type IA supernova 1991bg in the elliptical galaxy NGC 4374The Astronomical Journal, 1992
- Accreting white dwarf models for the type I supernovae. IV The optical spectrum of a carbon-deflagration supernovaThe Astrophysical Journal, 1985
- The Type I supernova 1981b in NGC 4536 - The first 100 daysThe Astrophysical Journal, 1983
- The theory of radiatively driven stellar winds. II - The line accelerationThe Astrophysical Journal, 1982