Publication Date:
2011-08-13
Description:
Type Ia supernovae are key tools for measuring distances on a cosmic scale. They are generally thought to be the thermonuclear explosion of an accreting white dwarf in a close binary system. The nature of the mass donor is still uncertain. In the single-degenerate model it is a main-sequence star or an evolved star, whereas in the double-degenerate model it is another white dwarf. We show that the velocity structure of absorbing material along the line of sight to 35 type Ia supernovae tends to be blueshifted. These structures are likely signatures of gas outflows from the supernova progenitor systems. Thus, many type Ia supernovae in nearby spiral galaxies may originate in single-degenerate systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sternberg, A -- Gal-Yam, A -- Simon, J D -- Leonard, D C -- Quimby, R M -- Phillips, M M -- Morrell, N -- Thompson, I B -- Ivans, I -- Marshall, J L -- Filippenko, A V -- Marcy, G W -- Bloom, J S -- Patat, F -- Foley, R J -- Yong, D -- Penprase, B E -- Beeler, D J -- Allende Prieto, C -- Stringfellow, G S -- New York, N.Y. -- Science. 2011 Aug 12;333(6044):856-9. doi: 10.1126/science.1203836.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Benoziyo Center for Astrophysics, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100, Israel. assaf.sternberg@weizmann.ac.il〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21836010" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
,
Medicine
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Natural Sciences in General
,
Physics
