Photospheric Radius Evolution of Homologous Explosions

doi:10.3847/2041-8213/aaeff6

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	Photospheric Radius Evolution of Homologous Explosions
	Liu, LD; Zhang, B; Wang, LJ; Dai, ZG; Liu, Liang-Duan, Zhang, Bing, Wang, Ling-Jun; Dai, Zi-Gao; Wang LJ(王灵俊)
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2018
卷号	868 期号:2 页码:L24
关键词	opacity supernovae: general
ISSN号	2041-8205
DOI	10.3847/2041-8213/aaeff6
文献子类	Article
英文摘要	Recent wide-field surveys discovered new types of peculiar optical transients that showed diverse behaviors of the evolution of photospheric properties. We develop a general theory of homologous explosions with constant opacity, paying special attention to the evolution of the photospheric radius R-ph. We find that regardless of the density distribution profile, R-ph always increases early on and decreases at late times. This result does not depend on the radiation and cooling processes inside the ejecta. The general rising/falling behavior of R-ph can be used to quickly diagnose whether the source originates from a supernova-like explosion. The shape of the R-ph evolution curve depends on the density profile, so the observations may be used to directly diagnose the density profile as well as the temperature profile of the ejecta. All of the well-monitored supernovae show such a R-ph rising/falling behavior, which is consistent with our theory. The recently discovered peculiar transient AT 2018cow showed a continuous decay of R-ph, for which a supernova-like explosion origin is disfavored. Our result therefore supports the interpretation of this transient as a tidal disruption event.
电子版国际标准刊号	2041-8213
WOS关键词	ANALYTIC SOLUTIONS ; LIGHT CURVES ; SUPER-NOVAE ; TRANSIENTS
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000451002200001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286990]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Liu, LD,Zhang, B,Wang, LJ,et al. Photospheric Radius Evolution of Homologous Explosions[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,868(2):L24.
APA	Liu, LD.,Zhang, B.,Wang, LJ.,Dai, ZG.,Liu, Liang-Duan, Zhang, Bing, Wang, Ling-Jun.,...&王灵俊.(2018).Photospheric Radius Evolution of Homologous Explosions.ASTROPHYSICAL JOURNAL LETTERS,868(2),L24.
MLA	Liu, LD,et al."Photospheric Radius Evolution of Homologous Explosions".ASTROPHYSICAL JOURNAL LETTERS 868.2(2018):L24.