A Fallback Accretion Model for the Unusual Type II-P Supernova iPTF14hls

doi:10.3847/1538-4357/aadba4

	A Fallback Accretion Model for the Unusual Type II-P Supernova iPTF14hls
	Li B(李兵); Song LM(宋黎明); Li, B; Cano, Z; Rui, LM; Liu, LD; Song, LM; Dai, ZG; Wang, SQ; Wang LJ(王灵俊)
刊名	ASTROPHYSICAL JOURNAL
	2018
卷号	865 期号:2 页码:95
关键词	stars: massive supernovae: general supernovae: individual (iPTF14hls) X-rays: bursts
ISSN号	0004-637X
DOI	10.3847/1538-4357/aadba4
文献子类	Article
英文摘要	The Intermediate Palomar Transient Factory reported the discovery of an unusual type II-P supernova iPTF14hls. Instead of an similar to 100 day plateau as observed for ordinary type II-P supernovae, the light curve of iPTF14hls has at least five distinct peaks, followed by a steep decline at similar to 1000 days since discovery. Until 500 days since discovery, the effective temperature of iPTF14hls is roughly constant at 5000-6000 K. In this paper, we propose that iPTF14hls is likely powered by intermittent fallback accretion. It is found that the light curve of iPTF14hls can be well fit by the usual t(-5/3) accretion law until similar to 1000 days post discovery when the light curve transitions to a steep decline. To account for this steep decline, we suggest a power-law density profile for the late accreted material, rather than the constant profile as appropriated for the t(-5/3) accretion law. Detailed modeling indicates that the total fallback mass is similar to 0.2 M-circle dot, with an ejecta mass M-ej congruent to 21 M-circle dot. We find the third peak of the light curve cannot be well fit by the fallback model, indicating that there could be some extra rapid energy injection. We suggest that this extra energy injection may be a result of a magnetic outburst if the central object is a neutron star. These results indicate that the progenitor of iPTF14hls could be a massive red supergiant.
电子版国际标准刊号	1538-4357
WOS关键词	CORE-COLLAPSE SUPERNOVAE ; X-RAY PULSAR ; BLACK-HOLES ; SPHERICAL ACCRETION ; LIGHT CURVES ; CIRCUMSTELLAR INTERACTION ; DOMINATED ACCRETION ; SHOCK INSTABILITY ; MAGNETAR BIRTH ; RED SUPERGIANT
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000445822300004
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286366]
专题	高能物理研究所_多学科研究中心高能物理研究所_粒子天体物理中心
通讯作者	Wang LJ(王灵俊)
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	Li B,Song LM,Li, B,et al. A Fallback Accretion Model for the Unusual Type II-P Supernova iPTF14hls[J]. ASTROPHYSICAL JOURNAL,2018,865(2):95.
APA	李兵.,宋黎明.,Li, B.,Cano, Z.,Rui, LM.,...&Wang, XF.(2018).A Fallback Accretion Model for the Unusual Type II-P Supernova iPTF14hls.ASTROPHYSICAL JOURNAL,865(2),95.
MLA	李兵,et al."A Fallback Accretion Model for the Unusual Type II-P Supernova iPTF14hls".ASTROPHYSICAL JOURNAL 865.2(2018):95.