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VIII/58 A Survey of Radio H II Regions in the Northern Sky (Lockman+ 1989)
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A Survey of Radio H II Regions in the Northern Sky
Lockman F.J.
<Astrophys. J. Suppl. 71, 469 (1989)>
=1989ApJS...71..469L
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ADC_Keywords: H II regions ; Radio sources ; Radio lines; Surveys
Description:
Nearly 500 radio continuum sources near the Galactic plane at declinations
greater than -37 degrees were examined for radio recombination line emission
to see if they might be HII regions. A total of 462 were detected, about
half of these for the first time. The data are presented in an extensive
table. Among the newly discovered nebulae are several with recombinations
lines so narrow that their electron temperature must be less than 4600 K.
In one case the line width (in several transitions) is only 11.6 km/s,
requiring electron temperatures less than about 2900 K.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 98 462 Catalog of radio H II regions
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 F7.3 deg GLON Galactic longitude
8- 14 F7.3 deg GLAT Galactic latitude
17- 18 I2 h RAh Right Ascension (1950)
19- 20 I2 min RAm Right Ascension (1950)
21- 24 F4.1 s RAs Right Ascension (1950)
25 A1 --- DE- Declination sign (1950)
26- 27 I2 deg DEd Declination (1950)
28- 29 I2 arcmin DEm Declination (1950)
30- 31 I2 arcsec DEs Declination (1950)
35- 38 I4 mK T Peak antenna temperature of
detected line
40- 43 F4.1 mK e_T Uncertainty (1 sigma) in peak
antenna temperature
47- 51 F5.1 km/s FWHM Full-width at half-maximum of
detected line
53- 56 F4.1 km/s e_FWHM Uncertainty (1 sigma) in FWHM
61- 65 F5.1 km/s VLSR Velocity with respect to the local
standard of rest
67- 70 F4.1 km/s e_VLSR Uncertainty (1 sigma) in VLSR
75- 78 F4.1 mK GRMS RMS deviation of observed line from
Gaussian fit
80- 83 F4.1 mK BRMS RMS in baseline parts of spectrum
84- 98 A15 --- Notes *Source Comments
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Note on Notes:
Mainly gives name of optical counterpart to radio source. Also identifies
sources observed at bands other than or in addition to 3 cm. If an H II
region has been detected in several bands, the most accurate measurement is
listed and the others just noted. Letter "D" refers to sources that show
two recombination lines at distinctly different velocities. "Note"
indicates that there are additonal notes in main reference.
Acknowledgements:
H. Andernach <Heinz.Andernach@astro.ugto.mx> and S. Trushkin scanned
the published data table, made format changes, and provided a copy of
their electronic version to ADC.
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(End) Tom Sodroski [SSDOO/ADC] 26-Jul-1999