Comparison of radio and optical positions of radio stars

Details Comparison of radio and optical positions of radio stars Comparison of radio and optical positions of radio stars

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109..428a&link_type=abstract

The Astronomical Journal (ISSN 0004-6256), vol. 109, no. 1669, p. 428-433

Mathematics

Logic

7

Astronomical Catalogs, Comparison, Position (Location), Radio Stars, Morphology, Statistical Analysis, Very Large Array (Vla), Very Long Base Interferometry

Scientific paper

A comparison between radio and optical positions of radio stars is presented. Eighty-eight optical minus radio differences from 56 stars are considered. To produce this comparison with high precision, a catalog was compiled based on the Carlsberg Meridian Catalogues Nos. 4, 5, and 6, and on a catalog of 221 radio stars observed with the Bordeaux automatic meridian circle. Most of the radio positions are from the Very Large Array (VLA) facilities. The overall average differences lead to a tie between the radio and optical frames at the level of 30 milliarcseconds. Also the relative orientation between the two frames is examined and is found to coincide within the limit of errors. Finally, it is found that different morphological types of radio stars give rise to different levels of agreement between the radio and optical systems.

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