Fast and Young Type Ia supernovae are thought to result from the thermonuclear explosion of a white dwarf star accreting material from a companion star in a binary system. Their adoption as cosmic yardsticks has led to the discovery of the accelerated expansion of the universe. Wang et al. (p. 170 , published online 7 March) show that supernovae with higher expansion velocities are located in the central, brighter regions of their host galaxies and are found in larger, more luminous galaxies, suggesting that they are associated with younger stellar populations.
B. Dilday, D. A. Howell, S. B. Cenko, J. M. Silverman, P. Nugent, M. Sullivan, Sagi Ben-Ami, Lars Bildsten, Michael Bolte, Michael Endl, Alexei V Filippenko, Orly Gnat, A. Horesh, E. Y. Hsiao, M. M. Kasliwal, David Kirkman, K. Maguire, Geoffrey W. Marcy, Kevin L. Moore, Y. C. Pan, J. Parrent, Philipp Podsiadlowski, R. Quimby, A. Sternberg, N. Suzuki, David Tytler, D. Xu, J. S. Bloom, A. Gal‐Yam, I. Hook, S. R. Kulkarni, Nicholas M. Law, E. O. Ofek, David Polishook, D. Poznanski
A. Sternberg, A. Gal‐Yam, Joshua D. Simon, Douglas C. Leonard, R. Quimby, M. M. Phillips, N. Morrell, I. B. Thompson, Inese I. Ivans, J. L. Marshall, Alexei V Filippenko, Geoffrey W. Marcy, J. S. Bloom, F. Patat, R. J. Foley, David Yong, Bryan E. Penprase, Daniel J. Beeler, Carlos Allende Prieto, Guy S. Stringfellow
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