Journal
SCIENCE
Volume 347, Issue 6229, Pages 1459-1462Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1261475
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Funding
- Christopher R. Redlich Fund
- TABASGO Foundation
- NSF [AST-1211916]
- SLAC Department of Energy [DE-AC02-76SF00515]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1211916] Funding Source: National Science Foundation
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The luminosities of type Ia supernovae (SNe), the thermonuclear explosions of white-dwarf stars, vary systematically with their intrinsic color and the rate at which they fade. From images taken with the Galaxy Evolution Explorer (GALEX), we identified SNe Ia that erupted in environments that have high ultraviolet surface brightness and star-formation surface density. When we apply a steep model extinction law, we calibrate these SNe using their broadband optical light curves to within similar to 0.065 to 0.075 magnitude, corresponding to <4% in distance. The tight scatter, probably arising from a small dispersion among progenitor ages, suggests that variation in only one progenitor property primarily accounts for the relationship between their light-curve widths, colors, and luminosities.
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