No signature of ejecta interaction with a stellar companion in three type Ia supernovae

被引：122

作者：

Olling, Rob P. ^{[1
]}

Mushotzky, Richard ^{[1
]}

Shaya, Edward J. ^{[1
]}

Rest, Armin ^{[2
]}

Garnavich, Peter M. ^{[3
]}

Tucker, Brad E. ^{[4
,5
]}

Kasen, Daniel ^{[5
,6
]}

Margheim, Steve ^{[7
]}

Filippenko, Alexei V. ^{[5
]}

机构：

[1] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[2] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[3] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[4] Australian Natl Univ, Mt Stromlo Observ, Weston, ACT 2611, Australia

[5] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[6] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[7] AURA, Southern Operat Ctr, Gemini Observ, La Serena, Chile

来源：

NATURE | 2015年 / 521卷 / 7552期

基金：

美国国家科学基金会; 澳大利亚研究理事会;

关键词：

SN; 2011FE; LEGACY SURVEY; LIGHT CURVES; RISE-TIME; STAR; CATALOG; PROGENITORS; DISCOVERY; SPECTRA; 2012CG;

D O I：

10.1038/nature14455

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Type Ia supernovae are thought to be the result of a thermonuclear runaway in carbon/oxygen white dwarfs, but it is uncertain whether the explosion is triggered by accretion from a non-degenerate companion star or by a merger with another white dwarf. Observations of a supernova immediately following the explosion provide unique information on the distribution of ejected material(1) and the progenitor system. Models predict(2) that the interaction of supernova ejecta with a companion star or circumstellar debris lead to a sudden brightening lasting from hours to days. Here we present data for three supernovae that are likely to be type Ia observed during the Kepler mission(3) with a time resolution of 30 minutes. We find no signatures of the supernova ejecta interacting with nearby companions. The lack of observable interaction signatures is consistent with the idea that these three supernovae resulted from the merger of binary white dwarfs or other compact stars such as helium stars.

引用

页码：332 / +

页数：7

共 31 条

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