J/AJ/129/348 Radio compact HII regions in the Milky Way (Giveon+, 2005)
A new catalog of radio compact H II regions in the Milky Way. Giveon U., Becker R.H., Helfand D.J., White R.L. <Astron. J., 129, 348-354 (2005)> =2005AJ....129..348G
ADC_Keywords: H II regions Keywords: catalogs - Galaxy: general - H II regions Abstract: We use new VLA Galactic plane catalogs at 5 and 1.4 GHz covering the first Galactic quadrant (350°≤l≤42°, |b|≤0.4°) in conjunction with the MSX6C Galactic plane catalog (Cat. V/114) to construct a large sample of ultracompact H II regions. A radio catalog of this region was first published by Becker et al. (Cat. J/ApJS/91/347, but we have added new observations and rereduced the data with significantly improved calibration and mosaicking procedures, resulting in a tripling of the number of 5GHz sources detected. Comparison of the new 5GHz catalog and the MSX6C Galactic plane catalog resulted in a sample of 687 matches, out of which we estimate only 15 to be chance coincidences. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4a.dat 108 687 List of 6cm sources with a high-reliability (>90%) MSX match within 25" table4b.dat 108 387 List of 6cm sources with a low-reliability (50%<p<90%) MSX match within 25"
See also: J/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994) V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003) Byte-by-byte Description of file: table4a.dat table4b.dat
Bytes Format Units Label Explanations
1- 17 A17 --- [GBH2005] Source name ([GBH2005] GLLL.lllll+L.lllll in Simbad) 19- 24 F6.1 mJy F5GHzp Peak 5GHz flux density 26- 32 F7.1 mJy F5GHzi Integrated 5GHz flux density 34- 39 F6.2 arcsec MajDiam Deconvolved major axis 41- 45 F5.2 arcsec MinDiam Deconvolved minor axis 47- 50 F4.1 arcsec Sep Separation between the radio and IR sources 52- 68 A17 --- MSX6C MSX6C source name (Cat. V/114) 70 A1 --- l_F8um [<] Upper limit on F8um 71- 76 F6.2 Jy F8um MSX6C 8 micron flux density (1) 78 A1 --- l_F12um [<] Upper limit on F12um 79- 85 F7.2 Jy F12um MSX6C 12 micron flux density (1) 87 A1 --- l_F14um [<] Upper limit on F14um 88- 94 F7.2 Jy F14um MSX6C 14 micron flux density (1) 96 A1 --- l_F21um [<] Upper limit on F21um 97-103 F7.2 Jy F21um MSX6C 21 micron flux density (1) 105-108 F4.2 --- Rel The match reliability, between 0 (worst) and 1 (best)
Note (1): Negative values correspond to upper limits.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 25-Jul-2005
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