Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.181..255g&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 181, Nov. 1977, p. 255-258.
Astronomy and Astrophysics
Astronomy
40
Astrometry, Radio Sources (Astronomy), X Ray Sources, Absorption Spectra, H Lines, Line Spectra
Scientific paper
During the Cir X-1 radio outbursts of December 14-19, 1976, H I absorption observations were made with the Parkes 64-m telescope. The results were compared with a profile obtained on December 6, 1976, when the radio source was quiescent, and it was found that H I absorption extended to the velocity associated with the tangential point. The resulting lower limit to the distance is approximately 8 kpc, about a factor of two larger than previous estimates.
Goss William Miller
Mebold Ulrich
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