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Confronting 2D delayed-detonation models with light curves and spectra of Type Ia supernovae
supernovae general
2011/8/24
We compare models for Type Ia supernova (SN Ia) light curves and spectra with an extensive set of observations. The models come from a recent survey of 44 two-dimensional delayed-detonation models com...
The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints
The Supernova Legacy Survey 3-year sample Type Ia Supernovae photometric distances
2011/1/10
We present photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1) discovered during the first three years of the Supernova Legacy Survey (SNLS). Thes...
The birth rate of subluminous and overluminous type Ia supernovae
The birth rate subluminous overluminous type Ia supernovae
2011/1/11
Based on the results of Chen & Li (2009) and Pakmor et al. (2010), we carried out a series of binary population synthesis calculations and considered two treatment of common envelope (CE) evolution, i...
Sub-Chandrasekhar Mass Models For Type Ia Supernovae
Sub-Chandrasekhar Mass Models Type Ia Supernovae
2011/1/11
For white dwarfs accreting hydrogen or helium at rates in the range 1 to 5 x 10^(-8) Msun/yr, a variety of explosive outcomes are possible well before the star reaches the Chandrasekhar mass. The expl...
Double Detonation of Sub-Chandrasekhar White Dwarfs and Subluminous Type Ia Supernovae
Sub-Chandrasekhar White Dwarfs Subluminous Type Ia Supernovae
2011/1/11
Type Ia supernovae are thought to result from thermonuclear explosions of carbon-oxygen white dwarf stars. This model generally explains the observed properties with certain exceptions, like sub-lumin...
Characters of current type Ia supernovae data based on evolving dark energy models
dark energy theory supernova type Ia - standard candles cosmological param-eters from CMBR
2010/11/11
We study characters of recent type Ia supernova (SNIa) data using evolving dark energy models with changing equation of state parameter w. We consider sudden-jump approximation of w for some chosen re...
Type-Ia supernovae: new clues to their progenitors from the delay-time distribution
supernovae general
2010/11/10
Despite their prominent role in cosmography, little is yet known about the nature of type-Ia supernovae (SNe Ia),from the identity of their progenitor systems, through the evolution of those systems u...
A Review of Type Ia Supernovae as Stellar Endpoints and Cosmological Tools
Review of Type Ia Supernovae Stellar Endpoints Cosmological Toolsas Stellar Endpoints Cosmological Tools
2010/11/10
Empirically, Type Ia supernovae are the most useful, precise, and mature tools for determining
astronomical distances. Acting as calibrated candles they revealed the presence of dark energy and are b...
A Mismatch in the Ultraviolet Spectra between Low-Redshift and Intermediate-Redshift Type Ia Supernovae as a Possible Solution to the U-Band Anomaly
Cosmology and Extragalactic Astrophysics (astro-ph.CO) Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/4
We present Keck high-quality rest-frame ultraviolet (UV) through optical spectra of 21 Type Ia supernovae (SNe Ia) in the redshift range 0.11 < z < 0.37 and a mean redshift of 0.22 that were discovere...
Hubble Space Telescope Studies of Nearby Type Ia Supernovae: The Mean Maximum Light Ultraviolet Spectrum and its Dispersion
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
We present the first results of an ongoing campaign using the STIS spectrograph on-board the Hubble Space Telescope (HST) whose primary goal is the study of near ultraviolet (UV) spectra of local Type...
Rx j0513.9-6951 and v sagittae：accretion wind evolution, a Key evolutionary process to type IA supernovae
Rx j0513.9-6951 v sagittae IA supernovae
2009/6/17
Rx j0513.9-6951 and v sagittae：accretion wind evolution, a Key evolutionary process to type IA supernovae。