FGK 22 $\mu$m Excess Stars in LAMOST DR2 Stellar Catalog

• Main Authors: Wu, Chao-Jian, Wu, Hong, Liu, Kang, Li, Tan-Da, Yang, Ming, Lam, Man I, Yang, Fan, Wu, Yue, Zhang, Yong, Hou, Yonghui, Li, Guangwei
• Format: Journal Article
• Language: English
• Published: 10.03.2016
• Subjects: Physics - Astrophysics of Galaxies; Physics - Earth and Planetary Astrophysics; Physics - Solar and Stellar Astrophysics
• DOI: 10.48550/arxiv.1603.03296

Since the release of LAMOST (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope) catalog, we have the opportunity to use the LAMOST DR2 stellar catalog and \emph{WISE All-sky catalog} to search for 22 $\mu$m excess candidates. In this paper, we present 10 FGK candidates which show an excess in the infrared (IR) at 22 $\mu$m. The ten sources are all the newly identified 22 $\mu$m excess candidates. Of these 10 stars, 5 stars are F type and 5 stars are G type. The criterion for selecting candidates is $K_s-[22]_{\mu m}\geq0.387$. In addition, we present the spectral energy distributions (SEDs) covering wavelength from optical to mid-infrared band. Most of them show an obvious excess from 12 $\mu$m band and three candidates even show excess from 3.4 $\mu$m. To characterize the amount of dust, we also estimate the fractional luminosity of ten 22 $\mu$m excess candidates.