An H I absorption determination of the distance of W31

Details An H I absorption determination of the distance of W31 An H I absorption determination of the distance of W31

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...106..167k&link_type=abstract

Astronomy and Astrophysics, vol. 106, no. 1, Feb. 1982, p. 167-170. Research supported by the Netherlands Foundation for Astron

Astronomy and Astrophysics

Astronomy

12

Absorption Spectra, Distance, Hydrogen Clouds, Radio Sources (Astronomy), Hydrogen Atoms, Molecular Absorption, Optical Thickness, Radial Velocity, Radio Interferometers, Radio Telescopes

Scientific paper

The HI absorption spectrum of G 10.2-0.3 and G 10.3-0.1 in W31 has been investigated using the Westerbork Synthesis Radio Telescope. The spectra obtained confirm the results of Radhakrishnan et al (1972) and show that, to within the noise, there is no HI at velocities greater than +50 km/s. Results also indicate that the observed sources have a component of radial expansion associated with the expansion of the 4-kpc arm and located approximately 4 kpc from the galactic center and 5.5 kpc from the sun.

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