Radio and optical observations of the R Aquarii jet

Astronomy and Astrophysics – Astronomy

Scientific paper

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59

Binary Stars, Radio Astronomy, Stellar Mass Accretion, Stellar Mass Ejection, Variable Stars, Astronomical Maps, Iue, Mass Transfer, Radio Bursts, Stellar Spectra

Scientific paper

VLA observations at 6 cm and Lick Observatory optical plates of R Aquarii indicate the existence of a jetlike feature extending 7 to 10 arcsec from the central star. A wide field map at 6 cm shows an unresolved compact radio source which lies close to the axis defined by the jet at a distance of about three arcmin from R Aqr. Episodic mass transfer in this symbiotic variable could explain the erratic outbursts that R Aqr is known to undergo. Formation of an accretion disk and the accompanying radio-optical jet may characterize the observed outbursts in this system.

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