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The Luminous and Carbon-Rich Supernova 2006gz: A Double Degenerate Merger?
M. Hicken, P. M. Garnavich, J. L. Prieto +4
Spectra and light curves of SN 2006gz show the strongest signature of unburned carbon and one of the slowest fading light curves ever seen in a type Ia event (Delta m_15 = 0.69 +/-…
The Unique Type Ib Supernova 2005bf: A WN Star Explosion Model for Peculiar Light Curves and Spectra
N. Tominaga, M. Tanaka, K. Nomoto +22
Observations and modeling for the light curve (LC) and spectra of supernova (SN) 2005bf are reported. This SN showed unique features: the LC had two maxima, and declined rapidly af…
Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
Adam G. Riess, Louis-Gregory Strolger, John Tonry +16
We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to provide the first conclusive evidence for cosmic deceleration that pre…
New HST Observations of High Velocity Lyman Alpha and Balmer Alpha in SNR 1987A
Eli Michael, Richard McCray, C. S. J. Pun +12
We describe and model high velocity (~15,000 km/s) Lyman alpha and Balmer alpha emission from supernova remnant 1987A seen in September and October 1997 with the Space Telescope Im…