Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...218.9705k&link_type=abstract
American Astronomical Society, AAS Meeting #218, #97.05; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Phillips (1993) discovered a correlation between the maximum optical brightness of Type Ia supernovae and the rate at which the light curves decline. Within 10 years it was clear that the slope of the decline rate relation was shallower at longer wavelengths. Since 2004 it has been known that in the near-infrared Type Ia supernovae are very nearly standard candles. This makes them particularly useful for determining distances to the host galaxies because a combination of optical and near-IR photometry allows us to determine the extinction by dust even if the dust is very different than normal Milky Way dust. Questions on the grandest scale such as, "What is the ultimate fate of the universe?" hinge on getting accurate distances to objects in the universe. We discuss the advantages of using Type Ia supernovae for cosmology and summarize recent results, such as those of the ESSENCE supernova search, which was carried out with the Cerro Tololo 4-m telescope.
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