J/ApJS/141/157 CO (J=1-0) data of cold IRAS sources (Yang+, 2002)
A large-scale molecular line survey for cold IRAS sources in the Galaxy. I. The CO (J=1-0) data. Yang J., Jiang Z., Wang M., Ju B., Wang H. <Astrophys. J. Suppl. Ser. 141, 157 (2002)> =2002ApJS..141..157Y
ADC_Keywords: Radio sources ; Infrared sources ; Radial velocities Keywords: ISM: jets and outflows - radio lines: ISM - stars: formation Abstract: We conducted a large-scale survey for the cold infrared sources along the northern Galactic plane in the CO (J=1-0) line. There are 1912 IRAS sources selected on the basis of their color indices over the 12, 25, and 60µm wave bands and their association with regions of recent star formation. A quick single-point survey was made toward all of the sources, which results in a detection of 1331 sources with significant CO emission above the detection limit of 0.7K, inferring a CO detection rate of 70%. Located over a wide range of the Galactocentric distances, the CO sources show high concentration toward the spiral arms. Among the detected sources, there are 351 sources found to have high-velocity CO wing emission. A search for the latest catalog of high-velocity CO flows (HVFs) from young stellar objects indicates that 289 sources are beyond the present lists of HVFs. These high-velocity wing sources provide us with a comprehensive database for the study of HVFs from young stellar objects. Using the known outflow sources as an effective indicator, we found that the detection rate for high-velocity wings during the quick survey is 62%, moderately sensitive in searching for new outflow sources. The CO detection rate of the IRAS sources, combined with the ratio of high-velocity wing, suggests that 41% of the CO sources are undergoing the HVF phase. In this paper, the CO spectra are presented along with the preliminary statistics of the data. Description: Observations were made during 1997 April and 2001 May with the 13.7m (45 foot) radio telescope at Delingha, the millimeter-wave radio observatory of Purple Mountain Observatory, in the J=1-0 line of 12CO at 115271.204MHz. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 126 1331 Literature Data for Program Stars spectra/* 0 1330 *Individual spectra, in eps format
Note on spectra/*: the first spectrum (00017+6342.eps) is missing. The corresponding file contained all other spectra in the form of a tar ball.
See also: http://jets.pmo.ac.cn/starfm/xcold97.html : XCOLD97 HomePage Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 A11 --- IRAS The IRAS designation 13- 25 A13 --- Assoc The object's major association 27- 28 I2 h RAh Hour of Right Ascension (B1950) 30- 31 I2 min RAm Minute of Right Ascension (B1950) 33- 36 F4.1 s RAs Second of Right Ascension (B1950) 38 A1 --- DE- Sign of the Declination (B1950) 39- 40 I2 deg DEd Degree of Declination (B1950) 42- 43 I2 arcmin DEm Arcminute of Declination (B1950) 45- 46 I2 arcsec DEs Arcsecond of Declination (B1950) 48- 52 F5.1 deg GLON Galactic longitude 54- 58 F5.1 deg GLAT Galactic latitude 60- 64 F5.2 K TAp Peak antenna temperature 66- 69 F4.2 K e_TAp CO spectrum r.m.s noise level 71- 76 F6.2 km/s RV Local standard of rest radial velocity 78- 82 F5.2 km/s FWHM Full width at half maximum of the line (1) 84- 88 F5.2 km/s VSpan ? Line span measured at the 0K level 90-103 A14 --- Feature Notes on line profile features 105-109 F5.2 kpc Dist ? Kinematical distance (2) 111-126 A16 --- FileName Name of the file containing the spectra, in subdirectory spectra
Note (1): Derived from Gaussian fitting. Note (2): Derived using the galactic rotation curve, as described in the text.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 17-Sep-2002
|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|