A strong ultraviolet pulse from a newborn type Ia supernova

作者：Cao Yi^*; Kulkarni S R; Howell D Andrew; Gal Yam Avishay; Kasliwal Mansi M; Valenti Stefano; Johansson J; Amanullah R; Goobar A; Sollerman J; Taddia F; Horesh Assaf; Sagiv Ilan; Cenko S Bradley; Nugent Peter E; Arcavi Iair; Surace Jason; Wozniak P R; Moody Daniela I; Rebbapragada Umaa D; Bue Brian D; Gehrels Neil

来源：Nature, 2015, 521(7552): 328-+.

DOI：10.1038/nature14440

Type Ia supernovae(1) are destructive explosions of carbon-oxygen white dwarfs(2,3). Although they are used empirically to measure cosmological distances(4-6), the nature of their progenitors remains mysterious(3). One of the leading progenitor models, called the single degenerate channel, hypothesizes that a white dwarf accretes matter from a companion star and the resulting increase in its central pressure and temperature ignites thermonuclear explosion(3,7,8). Here we report observations with the Swift Space Telescope of strong but declining ultraviolet emission from a type Ia supernova within four days of its explosion. This emission is consistent with theoretical expectations of collision between material ejected by the supernova and a companion star(9), and therefore provides evidence that some type Ia supernovae arise from the single degenerate channel.

• 出版日期2015-5-21
• 单位中国科学院理论物理研究所; Los Alamos