Bell Lab. H I Survey - High Velocity Clouds (Stark+ 1992)

Details Bell Lab. H I Survey - High Velocity Clouds (Stark+ 1992) Bell Lab. H I Survey - High Velocity Clouds (Stark+ 1992)

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ycat..20790077s&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/79/77. Originally published in: 1992ApJS...79...77S

Physics

H I Data, Interstellar Medium, Radio Sources, Surveys

Scientific paper

Observations were made as drift scans along even declinations between -40 deg. and +90 deg. at the epoch (1981) of the observations. The horn antenna has a FWHM beam size of 2 deg. at 21 cm. The average rms noise of spectra taken at all declinations is 0.017 K in 5.2 km/s wide channels, although in some cases baseline problems make the survey unreliable at this level. The clouds catalogued were selected to be those near for which the velocities, when projected on the galactic plane at each possible distance, differed from the circular rotation velocities by more than 40 km/s. The boundaries of the clouds were determined by either a decrease in emission to near the baseline emission or a steep drop in antenna temperature. (1 data file).

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