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A Hot White Dwarf SDSS J134430.11+032423.1 with a Planetary Debris Disk
Li LF(李立芳)1,2,3; Zhang FH(张奉辉)1,2,3; Kong XY(孔晓阳)1,3,4; Han QW(韩全旺)1,3,4; Li, Jiansha1,3,4; Li, Lifang(Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-02-10
卷号836期号:1
DOI10.3847/1538-4357/836/1/71
产权排序第1完成单位
收录类别SCI
关键词Circumstellar Matter Stars: Individual: Sdss j134430.11+032423.1 White Dwarfs
摘要We discovered a debris disk around hot white dwarf (WD) SDSS J134430.11+032423.1 (SDSS J1344+0324). The effective temperature [T-eff = 26,071(+/- 163) K], surface gravity [log g = 7.88(2)], and mass [M= 0.58(1) M-circle dot] of this WD have been redetermined based on the analysis of its SDSS spectrum. We found. that SDSS J1344+0324 is currently the hottest. WD with a debris disk. Two spectra observed by SDSS at different times show that this object is similar to SDSS J1228+1040 with variable near-IR Ca II triplet emissions from a gaseous disk. The parameters of the debris disk are derived from the IR excess analysis of SDSS J1344 +0324. We found that the disk is the coolest of all debris disks around WDs, and that the inner and outer radii are very close to the tide radius of the WD. Thus, the debris disk is very narrow (about 0.22 R-circle dot). This implies. that it might be a newly formed disk resulting from the tidal disruption of a rocky planetary body that has just entered the tide volume of the WD. This might provide strong observational evidence for the formation of debris disks around WDs.
项目资助者Chinese Natural Science Foundation(11373063, 11273053, 11573062, 11390374, XDB09010202) ; YIPACAS Foundation(2012048) ; Yunnan Foundation(2011CI053) ; Alfred P. Sloan Foundation ; National Science Foundation ; U.S. Department of Energy ; National Aeronautics and Space Administration (NASA) ; Japanese Monbukagakusho ; Max Planck Society ; Higher Education Funding Council for England ; NASA ; NASA(NASS-98034)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000397304500023
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]DIGITAL SKY SURVEY ; IA PROGENITOR SURVEY ; DATA RELEASE ; STARS ; EMISSION ; EXCESS ; RICH ; FREQUENCY ; EXPLORER ; CATALOG
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9993
专题大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
通讯作者Li, Lifang(Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 650216, Kunming, P. R. China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Beijing, 100012, P. R. China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216, Kunming, P. R. China
4.University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Li LF,Zhang FH,Kong XY,et al. A Hot White Dwarf SDSS J134430.11+032423.1 with a Planetary Debris Disk[J]. ASTROPHYSICAL JOURNAL,2017,836(1).
APA Li LF,Zhang FH,Kong XY,Han QW,Li, Jiansha,&Li, Lifang.(2017).A Hot White Dwarf SDSS J134430.11+032423.1 with a Planetary Debris Disk.ASTROPHYSICAL JOURNAL,836(1).
MLA Li LF,et al."A Hot White Dwarf SDSS J134430.11+032423.1 with a Planetary Debris Disk".ASTROPHYSICAL JOURNAL 836.1(2017).
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