Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20913705r&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #137.05; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
R Aquarii is a long period variable star that exhibits silicon monoxide maser emission and is part of a binary system. Published velocity data for R Aqr has been collected and combined with SiO data taken at the University of Minnesota, Morris, in an effort to determine the orbital parameters of the binary system. The last determination was 17 years ago, a considerable fraction of the suspected orbital period, and the time span of the velocity data has more than doubled. Accurate orbital information is essential to the understanding of the mass transfer mechanism that may be occurring in this system and similar binary star systems. The recent SiO data suggest that the period may be 35 years, rather than the previous estimate of 44 years.
McIntosh Gordon
Rustan Gustav
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