The cooling time of white dwarfs produced from type Ia supernovae
arXiv:1005.3092 · doi:10.1088/1674-4527/10/9/006
Abstract
Type Ia supernovae (SNe Ia) play a key role in measuring cosmological parameters, in which the Phillips relation is adopted. However, the origin of the relation is still unclear. Several parameters are suggested, e.g. the relative content of carbon to oxygen (C/O) and the central density of the white dwarf (WD) at ignition. These parameters are mainly determined by the WD's initial mass and its cooling time, respectively. Using the progenitor model developed by Meng and Yang, we present the distributions of the initial WD mass and the cooling time. We do not find any correlation between these parameters. However, we notice that the range of the WD's mass decreases, while its average value increases with the cooling time. These results could provide a constraint when simulating the SN Ia explosion, i.e. the WDs with a high C/O ratio usually have a lower central density at ignition, while those having the highest central density at ignition generally have a lower C/O ratio. The cooling time is mainly determined by the evolutionary age of secondaries, and the scatter of the cooling time decreases with the evolutionary age. Our results may indicate that WDs with a long cooling time have more uniform properties than those with a short cooling time, which may be helpful to explain why SNe Ia in elliptical galaxies have a more uniform maximum luminosity than those in spiral galaxies.
8 pages, 3 figures, in press, by language editor
References in corpus (17)
- New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
- The Diversity of Type Ia Supernovae from Broken Symmetries
- Probing modifications of General Relativity using current cosmological observations
- Young and Massive Binary Progenitors of Type Ia Supernovae and Their Circumstellar Matter
- The single-degenerate channel for the progenitor of type Ia supernovae with different metallicities
- The progenitors of Type Ia supernovae with long delay times
- Evolving to Type Ia Supernovae with Short Delay Times
- A single-degenerate model for the progenitor of the Type Ia supernova 2002ic
- Companion Stars of Type Ia Supernovae
- A New Determination of the High Redshift Type Ia Supernova Rates with the Hubble Space Telescope Advanced Camera for Surveys
- On the progenitors of super-Chandrasekhar mass type Ia supernovae
- Metallicity as a source of dispersion in the SNIa bolometric light curve luminosity-width relationship
- A comprehensive progenitor model for SNe Ia
- The (54Fe+58Ni)/56Ni ratio as a second parameter for Type Ia supernova properties
- Evolving to type Ia supernovae with long delay time
- Companion Stars of Type Ia supernovae with different metallicities
- The envelope mass of red giant donors in Type Ia supernova progenitors