Interferometer measurements of H I absorption in the direction of 16 extragalactic radio sources

Details Interferometer measurements of H I absorption in the direction of 16 extragalactic radio sources Interferometer measurements of H I absorption in the direction of 16 extragalactic radio sources

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.182..209r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 182, Jan. 1978, p. 209-218.

Astronomy and Astrophysics

Astronomy

12

Absorption Spectra, Extragalactic Radio Sources, Hydrogen Clouds, Interferometry, Magellanic Clouds, Astronomical Spectroscopy, Hydrogen Atoms, Interstellar Extinction, Radial Velocity, Spin Temperature

Scientific paper

The Parkes interferometer has been used to measure the galactic H I absorption spectrum for 16 extragalactic sources. Absorption was detected for 12 sources and values of H I column density and spin temperature are derived in these directions. In addition, observations of 30 Doradus were made at two interferometer baselines over a complete range of projected position angles; these measurements show that the absorption by foreground H I in the Large Magellanic Cloud has two main velocity components, and reveal previously unrecognized spatial structure in the H I.

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