Details

Autor(en) / Beteiligte

• 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

Titel

Circumstellar material in type Ia supernovae via sodium absorption features

Ist Teil von

• Science (American Association for the Advancement of Science), 2011-08, Vol.333 (6044), p.856-859

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2011

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• 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.