Parameters of the classical type-IIP supernova SN 1999em
- 1 July 2005
- journal article
- Published by Pleiades Publishing Ltd in Astronomy Letters
- Vol. 31 (7), 429-441
- https://doi.org/10.1134/1.1958107
Abstract
Based on observations of SN 1999em, we determined the physical parameters of this supernova using hydrodynamic calculations including nonequilibrium radiative transfer. Taking the distance to SN 1999em estimated by the expanding photosphere method (EPM) to be D = 7.5 Mpc, we found the parameters of the presupernova: radius R = 450R⊙, mass M = 15M⊙, and explosion energy E = 7 × 1050 erg. For the distance D = 12 Mpc determined from Cepheids, R, M, and E must be increased to the following values: R = 1000R⊙, M = 18M⊙, and E = 1051 erg. We show that one cannot restrict oneself to using the simple analytical formulas relating the supernova and presupernova parameters to obtain reliable parameters for type-IIP presupernovae.Keywords
This publication has 19 references indexed in Scilit:
- Type IIP Supernovae as Cosmological Probes: A Spectral-fitting Expanding Atmosphere Model Distance to SN 1999emThe Astrophysical Journal, 2004
- The Type IIn supernova 1994W: evidence for the explosive ejection of a circumstellar envelopeMonthly Notices of the Royal Astronomical Society, 2004
- Type Ia Supernova models: Latest developmentsAstrophysics and Space Science, 2004
- Light curves and Hαluminosities as indicators of $\mathsf{^{56}}$Ni mass in type IIP supernovaeAstronomy & Astrophysics, 2003
- Photometry and spectroscopy of the Type IIP SN 1999em from outburst to dust formationMonthly Notices of the Royal Astronomical Society, 2003
- Observed and Physical Properties of Core‐Collapse SupernovaeThe Astrophysical Journal, 2003
- Preliminary Spectral Analysis of the Type II Supernova 1999emThe Astrophysical Journal, 2000
- A Comparative Modeling of Supernova 1993JThe Astrophysical Journal, 1998
- Nickel bubble instability and mixing in SN 1987AThe Astrophysical Journal, 1994
- Abundances of the elements: Meteoritic and solarGeochimica et Cosmochimica Acta, 1989