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J/ApJ/713/871  Sources in star-forming region Cyg-OB2 from X-ray (Wright+, 2010)

The massive star-forming region Cygnus OB2. II. Integrated stellar properties and the star formation history. Wright N.J., Drake J.J., Drew J.E., Vink J.S. <Astrophys. J., 713, 871-882 (2010)> =2010ApJ...713..871W
ADC_Keywords: Associations, stellar ; Stars, pre-main sequence ; Stars, masses ; YSOs ; Extinction ; Stars, early-type Keywords: open clusters and associations: individual (Cygnus OB2) - stars: early-type - stars: formation - stars: pre-main sequence Abstract: Cygnus OB2 is the nearest example of a massive star-forming region (SFR), containing over 50 O-type stars and hundreds of B-type stars. We have analyzed the properties of young stars in two fields in Cyg OB2 using the recently published deep catalog of Chandra X-ray point sources with complementary optical and near-IR photometry. Our sample is complete to ∼1M (excluding A- and B-type stars that do not emit X-rays), making this the deepest study of the stellar properties and star formation history in Cyg OB2 to date. Combining our stellar mass function (MF) and an estimate of the radial density profile of the association suggests a total mass of Cyg OB2 of ∼3x104M, similar to that of many of our Galaxy's most massive SFRs. Description: In this paper, we present an analysis and discussion of the stellar properties of sources in Cygnus OB2 taken from the X-ray derived catalog presented by Wright & Drake (2009, Paper I, Cat. J/ApJS/184/84). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 50 1500 Derived stellar properties of sources in Cygnus OB2 with optical or near-IR associations
See also: J/A+A/536/A31 : Cyg OB2 XMM observations (Rauw, 2011) J/ApJS/184/84 : X-ray sources in Cyg OB2 region (Wright+, 2009) J/A+A/486/453 : NIR photometry of early-type stars in Cyg OB2 (Comeron+, 2008) J/ApJ/664/1102 : Radial velocity survey of Cyg OB2 association (Kiminki+, 2007) J/A+A/464/211 : Chandra and near-IR obs. of Cyg OB2 (Albacete Colombo+, 2007) J/AJ/101/1408 : Massive stars in Cyg OB2. (Massey+ 1991) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [WD2009] [1/1696] Running X-ray source number 6- 7 I2 h RAh Hour of Right Ascension (J2000) (1) 9- 10 I2 min RAm Minute of Right Ascension (J2000) 12- 16 F5.2 s RAs Second of Right Ascension (J2000) 18 A1 --- DE- Sign of Declination (J2000) (1) 19- 20 I2 deg DEd Degree of Declination (J2000) (1) 22- 23 I2 arcmin DEm Arcminute of Declination (J2000) 25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000) 30 A1 --- Mmb [N/Y] Association membership information 32- 36 F5.2 Msun Mass ? Stellar mass 38- 41 F4.1 mag AV ? Extinction toward source 43- 50 A8 --- r_Mass Method or reference for mass and extinction (2)
Note (1): Of optical or near-IR source that X-ray source was matched. Note (2): Reference as follows: CMD = masses determined from the color-magnitude diagram K07 = Kiminki et al., 2007, Cat. J/ApJ/664/1102 MT91 = Massey & Thompson, 1991, Cat. J/AJ/101/1408 H03 = Hanson, M.M. 2003ApJ...597..957H N08 = Negueruela et al. 2008A&A...487..575N W73 = Walborn, N.R. 1973ApJ...180L..35W
History: From electronic version of the journal References: Wright & Drake. Paper I. 2009ApJS..184...84W Cat. J/ApJS/184/84
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Apr-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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