SERENDIPITOUS DISCOVERY OF A CANDIDATE DEBRIS DISK AROUND THE DA WHITE DWARF SDSS J114404.74+052951.6
文献类型：期刊论文
| 作者 | Guo, Jincheng1,2; Tziamtzis, Anestis3; Wang, Zhongxiang3 ; Liu, Jifeng1; Zhao, Jingkun1; Wang, Song1
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| 刊名 | Astrophysical Journal Letters
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| 出版日期 | 2015-09-10 |
| 卷号 | 810期号:2页码:1 |
| 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | EXTRASOLAR MINOR PLANET ; BROWN DWARF ; SKY SURVEY ; EXCESS ; DUST ; ACCRETION ; POLLUTION ; EMISSION ; CATALOG ; SYSTEMS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000364340000004 |
| 源URL | [http://119.78.226.72/handle/331011/28390]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 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):1. |
| 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),1. |
| 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):1. |
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