Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..282b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, March 15, 1991, p. 282-287. Research supported by
Astronomy and Astrophysics
Astronomy
11
Interstellar Gas, Radio Astronomy, Velocity Distribution, Visual Observation, Iue, Ultraviolet Spectra, Visible Spectrum
Scientific paper
Observations at the 21-cm wavelength obtained with the Lovell Telescope are used in a report on the detection of a weak H I emission feature at a velocity + 100 km/s LSR and of column density log N (H I) = 18.5 + or - 0.2 toward the star 4 Lac. The feature corresponds in velocity with a high-velocity gas component observed in several UV resonance lines in IUE spectra of this star. The component gas temperature, derived from radio, optical and UV spectra, lies in the range 5000 to 9000 K and the line-of-sight column thickness is estimated to be less than 10 pc. The relationship between this observed feature and the widely distributed High-Velocity Clouds (HVCs) is considered briefly.
Bates Brandon
Catney M. G.
Davies Rhodri D.
Gilheany S.
Hummel Evi
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