Access to Astronomical Catalogues

← Click to display the menu
J/A+A/539/A119         Pismis 24 stars with X-ray emission         (Fang+, 2012)

Star formation and disk properties in Pismis 24. Fang M., van Boekel R., King R.R., Henning T., Bouwman J., Doi Y., Okamato Y.K., Roccatagliata V., Sicilia-Aguilar A. <Astron. Astrophys. 539, A119 (2012)> =2012A&A...539A.119F
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; X-ray sources ; Photometry, infrared Keywords: stars: pre-main sequence - proto-planetary disks - surveys - open clusters and associations: individual: Pismis 24 Abstract: Circumstellar disks are expected to evolve quickly in massive young clusters harboring many OB-type stars. Two processes have been proposed to drive the disk evolution in such cruel environments: (1) gravitational interaction between circumstellar disks and nearby passing stars (stellar encounters), and (2) photoevaporation by UV photons from massive stars. The relative importance of both mechanisms is not well understood. Studies of massive young star clusters can provide observational constraints on the processes of driving disk evolution. We investigate the properties of young stars and their disks in the NGC 6357 complex, concentrating on the most massive star cluster within the complex: Pismis 24. Description: We use infrared data from the 2MASS and Spitzer GLIMPSE surveys, complemented with our own deep Spitzer imaging of the central regions of Pismis 24, in combination with X-ray data to search for young stellar objects (YSOs) in NGC 6357 complex. The infrared data constrain the disk presence and are complemented by optical photometric and spectroscopic observations, obtained with VLT/VIMOS, that constrain the properties of the central stars. The R-band observations were performed on 2008 April 1 and 6, and the I-band observations were done on 2008 May 1. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 139 643 Photometric magnitudes for stars with X-ray emission in Pismis 24 table3.dat 52 151 Stellar parameters for X-ray emissing stars with spectral types in Pismis 24
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/ApJS/168/100 : X-ray study of star-forming region NGC 6357 (Wang+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/643] Sequential number 5- 7 I3 --- W07 [1/778] Wang et al. 2007 (Cat. J/ApJS/168/100) number (<[WTF2007] NNN> in Simbad) 9- 12 F4.2 arcsec off Distance between X-ray source and optical/infrared counterpart 14- 15 I2 h RAh Right ascension (J2000) 17- 18 I2 min RAm Right ascension (J2000) 20- 24 F5.2 s RAs Right ascension (J2000) 26 A1 --- DE- Declination sign (J2000) 27- 28 I2 deg DEd Declination (J2000) 30- 31 I2 arcmin DEm Declination (J2000) 33- 36 F4.1 arcsec DEs Declination (J2000) 38- 43 F6.3 mag Rmag ?=- VIMOS R magnitude 45- 49 F5.3 mag e_Rmag ?=- rms uncertainty on Rmag 51- 56 F6.3 mag Imag ?=- VIMOS I magnitude 58- 62 F5.3 mag e_Imag ?=- rms uncertainty on Imag 64- 68 F5.2 mag Jmag ?=- 2MASS J magnitude 70- 73 F4.2 mag e_Jmag ?=- rms uncertainty on Jmag 75- 79 F5.2 mag Hmag ?=- 2MASS H magnitude 81- 84 F4.2 mag e_Hmag ?=- rms uncertainty on Hmag 86- 90 F5.2 mag Ksmag ?=- 2MASS Ks magnitude 92- 95 F4.2 mag e_Ksmag ?=- rms uncertainty on Ksmag 97-101 F5.2 mag [3.6] ?=- IRAC 3.6um magnitude 103-106 F4.2 mag e_[3.6] ?=- rms uncertainty on [3.6] 108-112 F5.2 mag [4.5] ?=- IRAC 4.5um magnitude 114-117 F4.2 mag e_[4.5] ?=- rms uncertainty on [4.5] 119-123 F5.2 mag [5.8] ?=- IRAC 5.8um magnitude 125-128 F4.2 mag e_[5.8] ?=- rms uncertainty on [5.8] 130-134 F5.2 mag [8.0] ?=- IRAC 8.0um magnitude 136-139 F4.2 mag e_[8.0] ?=- rms uncertainty on [8.0]
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 7 I3 --- W07 Wang et al. (2007, Cat. J/ApJS/168/100) identification number ([WTF2007] NNN) 9- 10 I2 h RAh Right ascension (J2000) 12- 13 I2 min RAm Right ascension (J2000) 15- 19 F5.2 s RAs Right ascension (J2000) 21 A1 --- DE- Declination sign (J2000) 22- 23 I2 deg DEd Declination (J2000) 25- 26 I2 arcmin DEm Declination (J2000) 28- 31 F4.1 arcsec DEs Declination (J2000) 33- 34 A2 --- SpT MK spectral type 36- 41 F6.3 mag Av ?=- Absorption in V band 43- 47 F5.3 Msun Mass ?=- Mass 49- 52 F4.1 Myr Age ?=- Age
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 13-Feb-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

catalogue service