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J/ApJ/671/781    Red supergiants in Sct-Cru Galactic arm    (Davies+, 2007)

A massive cluster of red supergiants at the base of the Scutum-Crux arm. Davies B., Figer D.F., Kudritzki R.-P., Mackenty J., Najarro F., Herrero A. <Astrophys. J., 671, 781-801 (2007)> =2007ApJ...671..781D
ADC_Keywords: Clusters, open ; Stars, supergiant ; Photometry, infrared Keywords: open clusters and associations: general - stars: evolution - stars: late-type - supergiants Abstract: We report on the unprecedented red supergiant (RSG) population of a massive young cluster, located at the base of the Scutum-Crux Galactic arm. We identify candidate cluster RSGs based on 2MASS photometry and medium-resolution spectroscopy. With follow-up high-resolution spectroscopy, we use CO band-head equivalent width and high-precision radial velocity measurements to identify a core grouping of 26 physically associated RSGs-the largest such cluster known to date. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 75 73 Observational data for the brightest stars in the 2MASS-PSC within 7' of the cluster center table2.dat 62 26 Derived data of the cluster stars
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq Sequential number (1) 3 A1 --- n_Seq Multiplicity index on Seq (1) 5- 6 I2 --- [S90] ? Stephenson (1990AJ.....99.1867S) number 8- 11 I4 --- N01 ? Nakaya et al. (2001AJ....122..876N) number 13- 14 I2 h RAh Right ascension (J2000.0) 16- 17 I2 min RAm Right ascension (J2000.0) 19- 22 F4.1 s RAs Right ascension (J2000.0) 24 A1 --- DE- Declination sign (J2000.0) 25- 26 I2 deg DEd Declination (J2000.0) 28- 29 I2 arcmin DEm Declination (J2000.0) 31- 34 F4.1 arcsec DEs Declination (J2000.0) 36- 41 F6.3 mag Jmag ? 2MASS J magnitude 43- 47 F5.3 mag Hmag ? 2MASS H magnitude 49- 53 F5.3 mag Ksmag ? 2MASS Ks magnitude 55- 64 A10 "YYYY/MM/DD" Date1 NIRSPEC observation date 66- 75 A10 "YYYY/MM/DD" Date2 IRMOS observation date
Note (1): Stars identified as <Cl* Stephenson 2 DFK NNa> in Simbad.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq Sequential number, as in table1 4- 8 F5.1 km/s Vlsr LSR velocity 10- 13 I4 K Teff Effective temperature 15- 17 I3 K e_Teff rms uncertainty on Teff 19- 20 A2 --- SpType MK spectral type 22- 25 F4.2 mag AKs Absorption in Ks band 27- 30 F4.2 mag e_AKs rms uncertainty on AKs 32- 37 F6.2 mag KMAG Absolute K magnitude 39- 42 F4.2 mag E_KMAG Error on KMAG (upper value) 44- 47 F4.2 mag e_KMAG Error on KMAG (lower value) 49- 52 F4.2 [solLum] logLbol Bolometric luminosity 54- 57 F4.2 [solLum] E_logLbol Error on Lbol (upper value) 59- 62 F4.2 [solLum] e_logLbol Error on Lbol (lower value)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Mar-2010
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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