Astrophys. J., Suppl. Ser., 208, 29 (2013/October-0)
Bright 22 µm excess candidates from the wise all-sky catalog and the Hipparcos main catalog.
WU C.-J., WU H., LAM M.-I., YANG M., WEN X.-Q., LI S., ZHANG T.-J. and GAO L.
Abstract (from CDS):
In this paper, we present a catalog that includes 141 bright candidates ( ≤ 10.27 mag, V band) showing an excess of infrared (IR) at 22 µm. Of these 141 candidates, 38 stars are known IR-excess stars or disks, 23 stars are double or multiple stars, and 4 are Be stars while the remaining more than 70 stars are identified as 22 µm excess candidates in our work. The criterion for selecting candidates is Ks- µm. All these candidates are selected from the Wide-field Infrared Survey Explorer all-sky data cross-correlated with the Hipparcos main catalog and the likelihood-ratio technique is employed. Considering the effect of background, we introduce the IRAS 100 µm level to exclude the high background. We also estimate the coincidence probability of these sources. In addition, we present the optical to mid-IR spectral energy distributions and optical images for all the candidates, and give the observed optical spectra of six stars with the National Astronomical Observatories, Chinese Academy of Sciences' 2.16 m telescope. To measure for the amount of dust around each star, the fractional luminosity is also provided. We also test whether our method of selecting IR-excess stars can be used to search for extra-solar planets; we cross-match our catalog with known IR-excess stars with planets but found no matches. Finally, we give the fraction of stars showing excess IR for different spectral types of main-sequence stars.
infrared: stars - planetary systems - protoplanetary disks - stars: formation
VizieR on-line data:
<Available at CDS (J/ApJS/208/29): table3.dat refs.dat>
erratum vol. 776, art. L17 (2013)
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