Robert Kirshner
Harvard-Smithsonian Center Astroph. (CfA) (Cambridge, Massachusetts, Etats-Unis d'Amérique)
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
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| « The Past, Present, and Future of Supernova Cosmology » |
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Robert Kirshner |
| Supernovae have been at the center of cosmological insights from Hubble's time to today. They provide the best information on the Hubble constant and direct information on recent acceleration attributed to dark energy. Now that nearby samples and distant ones are large enough, statistical errors no longer dominate the measurements and we need to address the systematic errors to do better in the future. I will show evidence from the ongoing Center for Astrophysics supernova program. Our efforts to use the spectra of Type Ia supernovae to reduce the scatter in the Hubble diagram have been disappointing, but our observations in the near infrared have proved very promising for reducing systematic errors and providing more certain knowledge of the nature of dark energy in the future. |
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vendredi 15 octobre 2010 - 11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |