FGK 22 μm excess stars in LAMOST DR2 stellar catalog  

作　　者：Chao-Jian Wu Hong Wu Kang Liu Tan-Da Li Ming Yang Man-I Lam Fan Yang Yue Wu Yong Zhang Yong-Hui Hou Guang-Wei Li 

机构地区：[1]Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences [2]National Astronomical Observatories, Chinese Academy of Sciences [3]Department of Astronomy, Beijing Normal University [4]Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences

出　　处：《Research in Astronomy and Astrophysics》2016年第7期9-14,共6页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11403061);the China Ministry of Science and Technology under the State Key Development Program for Basic Research(2014CB845705 and 2012CB821800);the National Natural Science Foundation of China(Grant Nos.11173030,11225316,11078017,11303038,10833006,10978014 and 10773014);the Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences

摘　　要：Since the release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST）catalog, we have had the opportunity to use the LAMOST DR2 stellar catalog and the WISE All-Sky Data Release catalog to search for 22 μm excess candidates. In this paper, we present 10 FGK candidates which show an excess in the infrared at 22 μm. All the 10 sources are newly identified 22 μm excess candidates.Of these 10 stars, five stars are F type and five stars are G type. The criterion for selecting candidates is Ks[22].387. In addition, we present the spectral energy distributions covering wavelengths from the optic-≥0al to mid-infrared band. Most of them show an obvious excess from the 12 μm band and three candidates even show excess from 3.4 μm. To characterize the amount of dust, we also estimate the fractional luminosity of10 22 μm excess candidates.Since the release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope（LAMOST）catalog, we have had the opportunity to use the LAMOST DR2 stellar catalog and the WISE All-Sky Data Release catalog to search for 22 μm excess candidates. In this paper, we present 10 FGK candidates which show an excess in the infrared at 22 μm. All the 10 sources are newly identified 22 μm excess candidates.Of these 10 stars, five stars are F type and five stars are G type. The criterion for selecting candidates is Ks[22].387. In addition, we present the spectral energy distributions covering wavelengths from the optic-≥0al to mid-infrared band. Most of them show an obvious excess from the 12 μm band and three candidates even show excess from 3.4 μm. To characterize the amount of dust, we also estimate the fractional luminosity of10 22 μm excess candidates.

关 键 词：INFRARED planetary systems stars formation planetary systems protoplanetary disks 

分 类 号：P152[天文地球—天文学]