J/ApJ/641/389 Millimetric observations of IRDC cores (Rathborne+, 2006)
Infrared dark clouds: precursors to star clusters. Rathborne J.M., Jackson J.M., Simon R. <Astrophys. J., 641, 389-405 (2006)> =2006ApJ...641..389R
ADC_Keywords: Molecular clouds ; Interstellar medium ; Infrared sources ; Millimetric/submm sources Keywords: dust, extinction - ISM: clouds - stars: formation Abstract: Infrared dark clouds (IRDCs) are dense molecular clouds seen as extinction features against the bright mid-infrared Galactic background. Millimeter continuum maps toward 38 IRDCs reveal extended cold dust emission to be associated with each of the IRDCs. IRDCs range in morphology from filamentary to compact and have masses of 120 to 16000M☉, with a median mass of 940M☉. Each IRDC contains at least one compact (0.5pc) dust core and most show multiple cores. We find 140 cold millimeter cores unassociated with MSX 8µm emission. Description: The 1.2mm continuum data toward the IRDCs were obtained at the Institut de Radioastronomie Millimetrique (IRAM) 30m telescope using the 117 element bolometer array MAMBO II in 2003 December and 2004 January-March. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 66 38 Properties of the IRDCs table3.dat 91 190 Properties of the IRDC cores
See also: V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003) J/ApJ/639/227 : MSX IRDC candidate catalog (Simon+, 2006) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 13 A13 --- MSXDC MSX Dark Cloud identification 15- 16 I2 h RAh Hour of Right Ascension (J2000.0) (1) 18- 19 I2 min RAm Minute of Right Ascension (J2000.0) (1) 21- 24 F4.1 s RAs Second of Right Ascension (J2000.0) (1) 26 A1 --- DE- Sign of the Declination (J2000.0) (1) 27- 28 I2 deg DEd Degree of Declination (J2000.0) (1) 30- 31 I2 arcmin DEm Arcminute of Declination (J2000.0) (1) 33- 36 F4.1 arcsec DEs Arcsecond of Declination (J2000.0) (1) 38- 41 F4.1 km/s VLSR LSR velocity (2) 43- 45 F3.1 km/s e_VLSR Error in VLSR (2) 47- 49 F3.1 kpc Dist Kinematic distance (2) 51- 54 I4 mJy F(1.2)p Peak flux at 1.2mm 56- 60 F5.2 Jy F(1.2)i Integrated flux at 1.2mm 62- 66 I5 solMass Mass Estimated mass
Note (1): Coordinates of the peak contrast (Simon et al. 2006, J/ApJ/639/227). Note (2): Data from Simon et al. (2006ApJ...653.1325S).
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [MSXDC] 7- 19 A13 --- MSXDC Infrared dark cloud identification 21- 24 A4 --- m_MSXDC Core identification (1) 26- 27 I2 h RAh Hour of Right Ascension (J2000) 29- 30 I2 min RAm Minute of Right Ascension (J2000) 32- 35 F4.1 s RAs Second of Right Ascension (J2000) 37 A1 --- DE- Sign of the Declination (J2000) 38- 39 I2 deg DEd Degree of Declination (J2000) 41- 42 I2 arcmin DEm Arcminute of Declination (J2000) 44- 45 I2 arcsec DEs Arcsecond of Declination (J2000) 47- 50 I4 mJy F(1.2)p Peak flux at 1.2mm 52- 55 F4.2 Jy F(1.2)i Integrated flux at 1.2mm 57- 58 I2 arcsec Adim Average angular FWHM diameter 60- 63 F4.2 pc Pdim Average physical FWHM diameter 65- 68 I4 Sun Mass Core mass (2) 70- 71 A2 --- n_MSXDC [em] Core associated with 8µm emission in the MSX images 73- 75 A3 --- OName Other identification from Simon et al. (2006, J/ApJ/639/227) 77- 80 A4 --- --- [IRAS] 82- 91 A10 --- IRAS IRAS association
Note (1): Named in order of decreasing peak 1.2mm flux with the designation "MM" (e.g., MM1, MM2, etc). Note (2): Calculated from the integrated flux from the two-dimensional Gaussian fit to the core.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 28-Feb-2008
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