Astronomy and Astrophysics – Astronomy
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95.1478m&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 95, May 1988, p. 1478-1483.
Astronomy and Astrophysics
Astronomy
29
Astrometry, Mira Variables, Nebulae, Photosphere, Very Large Array (Vla), Accretion Disks, H Alpha Line, Hydrogen Clouds, Radio Astronomy
Scientific paper
The R Aquarii symbiotic star system is surrounded by a large-scale optical nebula. The authors present observations of the nebular [O III] structure and discuss its morphological significance in context with previously observed small-scale radio-continuum features, which may be related. They suggest that a precessing accretion disk may explain the global features of both the large-scale optical emission and the small-scale radio emission. Moreover, the authors have determined an accurate position of the system's Mira, which suggests that a recent theoretical model, yielding an egg-shaped central H II region for symbiotic systems with certain physical parameters, may apply to R Aquarii. The optical position of the 387d period Mira variable is consistent with the authors' previous findings in the radio, that SiO maser emission is far removed from the Mira photosphere.
Crull Harry E.
Hollis Jan. M.
Kafatos Menas
Michalitsianos Andrew G.
Miller Jeffrey R.
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