Optical and radio position of Alpha Scorpii

Details Optical and radio position of Alpha Scorpii Optical and radio position of Alpha Scorpii

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...167..387c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 167, Oct. 1986, p. 387-389. Research supported by the Fundacao de Amparo a Pes

Astronomy and Astrophysics

Astronomy

6

Astrometry, Binary Stars, Position (Location), Radio Stars, Accuracy, Astrolabes, Radio Astronomy, Reference Systems, Scorpius Constellation

Scientific paper

In order to provide a direct connection between the radio reference frame and the fundamental optical system, a radiostar observing program has been started in 1982, with the Danjon astrolabe at Valinhos. First results, which include the radio star α Scorpii, have been published (Clauzet et al., 1985, 1986). Radio astrometric data for this star have also been published recently (Florkowski et al. 1985) which enable an "optical-radio" comparison in right ascension. A comparison of the radio and optical determinations of the A and B components position of α Sco suggests that a photocenter effect may play an important role in the optical results. An evaluation of this effect reduces the difference between radio and optical results from +0.021 s to -0.007 s.

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