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The Type II supernovae 2006V and 2006au: two SN 1987A-like events
F. Taddia, M. D. Stritzinger, J. Sollerman +11
Supernova 1987A revealed that a blue supergiant (BSG) star can end its life as a core-collapse supernova (SN). SN 1987A and other similar objects exhibit properties that distinguis…
Unburned Material in the Ejecta of Type Ia Supernovae
Gastón Folatelli, M. M. Phillips, Nidia Morrell +17
(Abridged) The presence of unburned material in the ejecta of normal Type Ia supernovae (SNeIa) is investigated using early-time spectroscopy obtained by the CSP. The tell-tale sig…
A study of the color diversity around maximum light in Type Ia supernovae
Regis Cartier, Francisco Forster, Paolo Coppi +5
From a sample of 12 well-observed Type Ia supernovae, we find clear evidence of correlations between early phase (U-B), (V-R), and (V-I) colors and the velocity shifts of the [Fe I…
Evidence for Type Ia Supernova Diversity from Ultraviolet Observations with the Hubble Space Telescope
Xiaofeng Wang, Lifan Wang, Alexei V. Filippenko +93
We present ultraviolet (UV) spectroscopy and photometry of four Type Ia supernovae (SNe 2004dt, 2004ef, 2005M, and 2005cf) obtained with the UV prism of the Advanced Camera for Sur…
The key role of the Calan/Tololo project in the discovery of the accelerating Universe
Mario Hamuy
The Nobel Prize in Physics 2011 has just been awarded to three astronomers: Saul Perlmutter, Brian Schmidt, and Adam Riess, for their amazing discovery of the accelerating expansio…
Constraining the Properties of SNe~Ia Progenitors from Light Curves
B. Sadler, P. Hoeflich, E. Baron +6
We present an analysis of high precision V light curves (LC) for 18 local Type Ia Supernovae, SNe Ia, as obtained with the same telescope and setup at the Las Campanas Observatory…