Comparisons of SiO maser and long-period variable positions in the R Aquarii and Omicron Ceti binary systems

Details Comparisons of SiO maser and long-period variable positions in the R Aquarii and Omicron Ceti binary systems Comparisons of SiO maser and long-period variable positions in the R Aquarii and Omicron Ceti binary systems

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...361..663h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Oct. 1, 1990, p. 663-666.

Astronomy and Astrophysics

Astrophysics

18

Astrometry, Binary Stars, Interstellar Masers, Variable Stars, Silicon Oxides, Very Large Array (Vla), Very Long Base Interferometry

Scientific paper

It has been determined that the absolute position of the centroid of SiO maser-emitting spots toward both R Aqr and Omicron Cet are coincident with the position of the long-period variables (LPVs) in these binary systems to within the errors of measurement. The SiO positions were determined with the Hat Creek interferometer, while the LPV positions were determined with the 8-in transit circle of the US Naval Observatory. These results contradict an earlier report of a circumbinary SiO maser far removed from the LPV in the R Aqr binary system; statistical reasons for the discrepancy are suggested. High-resolution spectra of both sources are presented and possible models are discussed.

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