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SNLS Spectroscopy: Testing for Evolution in Type Ia Supernovae
T. J. Bronder, I. M. Hook, P. Astier +19
Aims: We present a quantitative study of a new data set of high redshift Type Ia supernovae spectra, observed at the Gemini telescopes during the first 34 months of the Supernova L…
The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star
D. Andrew Howell, Mark Sullivan, Peter E. Nugent +14
The acceleration of the expansion of the universe, and the need for Dark Energy, were inferred from the observations of Type Ia supernovae (SNe Ia). There is consensus that SNe Ia…
The Rise Time of Type Ia Supernovae from the Supernova Legacy Survey
A. Conley, D. A. Howell, A. Howes +24
We compare the rise times of nearby and distant Type Ia supernovae (SNe Ia) as a test for evolution using 73 high-redshift spectroscopically-confirmed SNe Ia from the first two yea…
Rates and properties of type Ia supernovae as a function of mass and star-formation in their host galaxies
M. Sullivan, D. Le Borgne, C. J. Pritchet +27
(ABRIDGED) We show that Type Ia supernovae (SNe Ia) are formed within both very young and old stellar populations, with observed rates that depend on the stellar mass and mean star…
Towards a Cosmological Hubble Diagram for Type II-P Supernovae
Peter Nugent, Mark Sullivan, Richard Ellis +13
We present the first high-redshift Hubble diagram for Type II-P supernovae (SNe II-P) based upon five events at redshift up to z~0.3. This diagram was constructed using photometry…
Tramp Novae Between Galaxies in the Fornax Cluster: Tracers of Intracluster Light
James D. Neill, Michael M. Shara, William R. Oegerle
We report the results of a survey for novae in and between the galaxies of the Fornax cluster. Our survey provides strong evidence that intracluster novae exist and that they provi…