Absolute Magnitude Distributions and Light Curves of Stripped-Envelope Supernovae
| Autor: | Dean Richardson, E. Baron, David Branch |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Absolute magnitude
Physics 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) Extinction (astronomy) FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Light curve 01 natural sciences Galaxy Spectral line Luminosity Supernova Apparent magnitude Space and Planetary Science 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astronomical Journal. 131:2233-2244 |
| ISSN: | 1538-3881 0004-6256 |
| DOI: | 10.1086/500578 |
| Popis: | The absolute visual magnitudes of three Type IIb, 11 Type Ib and 13 Type Ic supernovae (collectively known as stripped-envelope supernovae) are studied by collecting data on the apparent magnitude, distance, and interstellar extinction of each event. Weighted and unweighted mean absolute magnitudes of the combined sample as well as various subsets of the sample are reported. The limited sample size and the considerable uncertainties, especially those associated with extinction in the host galaxies, prevent firm conclusions regarding differences between the absolute magnitudes of supernovae of Type Ib and Ic, and regarding the existence of separate groups of overluminous and normal-luminosity stripped-envelope supernovae. The spectroscopic characteristics of the events of the sample are considered. Three of the four overluminous events are known to have had unusual spectra. Most but not all of the normal luminosity events had typical spectra. Light curves of stripped-envelope supernovae are collected and compared. Because SN 1994I in M51 was very well observed it often is regarded as the prototypical Type Ic supernova, but it has the fastest light curve in the sample. Light curves are modeled by means of a simple analytical technique that, combined with a constraint on E/M from spectroscopy, yields internally consistent values of ejected mass, kinetic energy, and nickel mass. Comment: 39 pages, 14 figures, 7 tables; Accepted to AJ |
| Databáze: | OpenAIRE |
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