SERENDIPITOUS DISCOVERY OF A CANDIDATE DEBRIS DISK AROUND THE DA WHITE DWARF SDSS J114404.74+052951.6

	SERENDIPITOUS DISCOVERY OF A CANDIDATE DEBRIS DISK AROUND THE DA WHITE DWARF SDSS J114404.74+052951.6
	Guo, Jincheng 1,2; Tziamtzis, Anestis 3; Wang, Zhongxiang 3; Liu, Jifeng1 ; Zhao, Jingkun1 ; Wang, Song1
刊名	Astrophysical Journal Letters
	2015-09-10
卷号	810 期号:2
关键词	circumstellar matter stars: individual (SDSS J114404.74+052951.6) white dwarfs
英文摘要	We report our serendipitous discovery of a candidate debris disk around the recently identified DA white dwarf (WD) SDSS J114404.74+052951.6. The Ca II infrared (IR) triplet, while weakly detected in the source's optical spectrum, shows a double-peak like profile, and near-IR excesses are also detected from broadband imaging. The two features are commonly seen in the WD gaseous debris disks, and thus indicate the existence of such a disk around the DA WD. We further analyze the emission lines and broadband IR excesses and estimate that the debris disk may have a size of 20-50 R-WD and an inclination angle of 82 degrees. The estimated temperature and cooling age for this WD are 23,027 K and similar to 21 Myr, respectively, making it possibly one of the hottest and youngest among candidates of WD debris-disk systems. These properties are also in line with the likely conditions for having a sufficiently bright debris disk. Further observations of the source are warranted in order to determine the debris disk's properties and search for more absorption features of heavy elements.
收录类别	SCI
语种	英语
WOS记录号	WOS:000364340000004
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5546]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Guo, Jincheng,Tziamtzis, Anestis,Wang, Zhongxiang,et al. SERENDIPITOUS DISCOVERY OF A CANDIDATE DEBRIS DISK AROUND THE DA WHITE DWARF SDSS J114404.74+052951.6[J]. Astrophysical Journal Letters,2015,810(2).
APA	Guo, Jincheng,Tziamtzis, Anestis,Wang, Zhongxiang,Liu, Jifeng,Zhao, Jingkun,&Wang, Song.(2015).SERENDIPITOUS DISCOVERY OF A CANDIDATE DEBRIS DISK AROUND THE DA WHITE DWARF SDSS J114404.74+052951.6.Astrophysical Journal Letters,810(2).
MLA	Guo, Jincheng,et al."SERENDIPITOUS DISCOVERY OF A CANDIDATE DEBRIS DISK AROUND THE DA WHITE DWARF SDSS J114404.74+052951.6".Astrophysical Journal Letters 810.2(2015).