thedebrisdiskcandidateseleven24mexcessstarsinthespitzerswirefields
文献类型：期刊论文
| 作者 | Wu Hong2 ; Wu Chaojian3; Cao Chen1; Wolf Sebastian4; Hu Jingyao2
|
| 刊名 | researchinastronomyandastrophysics
 |
| 出版日期 | 2012 |
| 卷号 | 012期号:005页码:513 |
| ISSN号 | 1674-4527 |
| 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 μm sources matched with both the SDSS star catalog and the 2MASS point source catalog. They show an excess in the mid-infrared at 24 μm （Ks-24vega 〉 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× 10-5, even up to the high fractional luminosity of 1×10-3. 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 exellent 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. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/38975]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Institute of Space Science and Physics,Shandong University at Weihai 2.中国科学院国家天文台 3.Department of Astronomy,Beijing Normal University 4.Max Planck Institute for Astronomy |
| 推荐引用方式 GB/T 7714 | Wu Hong,Wu Chaojian,Cao Chen,et al. thedebrisdiskcandidateseleven24mexcessstarsinthespitzerswirefields[J]. researchinastronomyandastrophysics,2012,012(005):513. |
| APA | Wu Hong,Wu Chaojian,Cao Chen,Wolf Sebastian,&Hu Jingyao.(2012).thedebrisdiskcandidateseleven24mexcessstarsinthespitzerswirefields.researchinastronomyandastrophysics,012(005),513. |
| MLA | Wu Hong,et al."thedebrisdiskcandidateseleven24mexcessstarsinthespitzerswirefields".researchinastronomyandastrophysics 012.005(2012):513. |
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来源：国家天文台
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