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Circumstellar Material in Type Ia Supernovae via Sodium Absorption Features

by Bloom, J. S. , Marshall, J. L. , Leonard, D. C. , Penprase, B. E. , Quimby, R. M. , Gal-Yam, A. , Simon, J. D. , Foley, R. J. , Stringfellow, G. S. , Thompson, I. B. , Marcy, G. W. , Beeler, D. J. , Patat, F. , Sternberg, A. , Prieto, C. Allende , Ivans, I. , Yong, D. , Phillips, M. M. , Filippenko, A. V. , Morrell, N.

in Absorption / Astronomy / Double stars / Line of sight / Signatures / Sodium / Spiral galaxies / Star & galaxy formation / Stars / Supernovae / Thermonuclear explosions / White dwarfs

2011

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Circumstellar Material in Type Ia Supernovae via Sodium Absorption Features

in Absorption / Astronomy / Double stars / Line of sight / Signatures / Sodium / Spiral galaxies / Star & galaxy formation / Stars / Supernovae / Thermonuclear explosions / White dwarfs

2011

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Circumstellar Material in Type Ia Supernovae via Sodium Absorption Features

in Absorption / Astronomy / Double stars / Line of sight / Signatures / Sodium / Spiral galaxies / Star & galaxy formation / Stars / Supernovae / Thermonuclear explosions / White dwarfs

2011

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Journal Article

Circumstellar Material in Type Ia Supernovae via Sodium Absorption Features

Bloom, J. S.,

Marshall, J. L.,

Leonard, D. C.,

Penprase, B. E.,

Quimby, R. M.,

Gal-Yam, A.,

Simon, J. D.,

Foley, R. J.,

Stringfellow, G. S.,

Thompson, I. B.,

Marcy, G. W.,

Beeler, D. J.,

Patat, F.,

Sternberg, A.,

Prieto, C. Allende,

Ivans, I.,

Yong, D.,

Phillips, M. M.,

Filippenko, A. V.,

Morrell, N.

2011

Overview

Most of the progenitors of type Ia supernovae in nearby spiral galaxies may be white dwarf−normal star binary systems. 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.

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Publisher

The American Association for the Advancement of Science

Subject

/ Sodium