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J/ApJS/209/32 Probable young stars in the MYStIX project (Broos+, 2013)
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Beginning of ReadMe :J/ApJS/209/32 Probable young stars in the MYStIX project (Broos+, 2013)
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Identifying young stars in massive star-forming regions for the MYStIX project.
Broos P.S., Getman K.V., Povich M.S., Feigelson E.D., Townsley L.K.,
Naylor T., Kuhn M.A., King R.R., Busk H.A.
<Astrophys. J. Suppl. Ser., 209, 32 (2013)>
=2013ApJS..209...32B
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ADC_Keywords: Photometry, infrared ; X-ray sources ; YSOs ;
Cross identifications ; H II regions ; Clusters, open
Keywords: infrared: stars - methods: data analysis - methods: statistical -
open clusters and associations: general - stars: pre-main sequence -
X-rays: general - X-rays: stars
Abstract:
The Massive Young star-forming complex Study in Infrared and X-rays
(MYStIX) project requires samples of young stars that are likely
members of 20 nearby Galactic massive star-forming regions. Membership
is inferred from statistical classification of X-ray sources, from
detection of a robust infrared excess that is best explained by
circumstellar dust in a disk or infalling envelope and from published
spectral types that are unlikely to be found among field stars. We
present the MYStIX membership lists here, and describe in detail the
statistical classification of X-ray sources via a "Naive Bayes
Classifier."
Description:
The Massive Young star-forming complex Study in Infrared and X-rays
(MYStIX) project, described by Feigelson et al. (2013ApJS..209...26F),
seeks to identify and study samples of young stars in 20 nearby
(0.4<d<3.6kpc) Galactic massive star-forming regions (MSFRs). These
samples are derived using X-ray data from the Chandra X-ray
Observatory, near-infrared (NIR) photometry from the United Kingdom
InfraRed Telescope (UKIRT) and from the Two Micron All Sky Survey
(2MASS), mid-infrared (MIR) photometry from the Spitzer Space
Telescope, and published spectroscopically identified massive stars.
Our purpose here is to describe our efforts to minimize contaminants
in the MYStIX catalogs of young stars, which we refer to as "MYStIX
Probable Complex Members" (MPCMs), and to present the MPCM catalog for
each MYStIX MSFR. An MPCM catalog is the union of three sets of
probable members identified by three established methods for
identifying young stars (Feigelson et al. 2013ApJS..209...26F, Fig. 3).