The debris disk candidates: eleven 24 mu m excess stars in the Spitzer SWIRE fields
文献类型：期刊论文
| 作者 | Wu, Hong1 ; Wu, Chao-Jian2; Cao, Chen3,4; Wolf, Sebastian5; Hu, Jing-Yao1
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2012-05-01 |
| 卷号 | 12期号:5页码:513-528 |
| 关键词 | infrared: stars planetary systems: protoplanetary disks stars: formation |
| 英文摘要 | We present the optical to mid-infrared SEDs of 11 debris disk candidates from Spitzer SWIRE fields. All the candidates are selected from SWIRE 24 mu m sources matched with both the SDSS star catalog and the 2MASS point source catalog. They show an excess in the mid-infrared at 24 mu m (K-S-[24](Vega) >= 0.44), indicating the presence of a circumstellar dust disk. The observed optical spectra show that they are all late-type main-sequence stars covering the spectral types of FGKM. Their fractional luminosities are well above 5 x 10(-5), even up to the high fractional luminosity of 1 x 10(-3). The high galactic latitudes of SWIRE fields indicate that most of these candidates could belong to the oldest stars in the thick disk. Our results indicate that high fractional luminosity debris disks could exist in old solar-like star systems, though they are still quite rare. Their discovery at high galactic latitudes also provides an excellent opportunity for further study of the properties and evolution of debris disks in regions of the Galaxy with low densities of ISM, called ISM poor environments. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000304387000004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6351]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 3.Shandong Univ, Inst Space Sci & Phys, Weihai 264209, Peoples R China 4.Shandong Prov Key Lab Opt Astron & Solar Terr, Weihai 264209, Peoples R China 5.Max Planck Inst Astron, D-69117 Heidelberg, Germany |
| 推荐引用方式 GB/T 7714 | Wu, Hong,Wu, Chao-Jian,Cao, Chen,et al. The debris disk candidates: eleven 24 mu m excess stars in the Spitzer SWIRE fields[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(5):513-528. |
| APA | Wu, Hong,Wu, Chao-Jian,Cao, Chen,Wolf, Sebastian,&Hu, Jing-Yao.(2012).The debris disk candidates: eleven 24 mu m excess stars in the Spitzer SWIRE fields.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(5),513-528. |
| MLA | Wu, Hong,et al."The debris disk candidates: eleven 24 mu m excess stars in the Spitzer SWIRE fields".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.5(2012):513-528. |
入库方式： OAI收割
来源：国家天文台
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