English

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

Solar and Stellar Astrophysics 2016-07-13 v1 Earth and Planetary Astrophysics Astrophysics of Galaxies

Abstract

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 μ\mum excess candidates. In this paper, we present 10 FGK candidates which show an excess in the infrared (IR) at 22 μ\mum. The ten sources are all the newly identified 22 μ\mum excess candidates. Of these 10 stars, 5 stars are F type and 5 stars are G type. The criterion for selecting candidates is Ks[22]μm0.387K_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 μ\mum band and three candidates even show excess from 3.4 μ\mum. To characterize the amount of dust, we also estimate the fractional luminosity of ten 22 μ\mum excess candidates.

Keywords

Cite

@article{arxiv.1603.03296,
  title  = {FGK 22 $\mu$m Excess Stars in LAMOST DR2 Stellar Catalog},
  author = {Chao-Jian Wu and Hong Wu and Kang Liu and Tan-Da Li and Ming Yang and Man I Lam and Fan Yang and Yue Wu and Yong Zhang and Yonghui Hou and Guangwei Li},
  journal= {arXiv preprint arXiv:1603.03296},
  year   = {2016}
}

Comments

11 pages, 5 figures, 1 table. Accepted for publication in RAA