Ultraviolet variability and mass expulsion from R Aquarii

Abstract

view Abstract Citations (61) References (45) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet Variability and Mass Expulsion from R Aquarii Kafatos, M. ; Michalitsianos, A. G. ; Hollis, J. M. Abstract Ultraviolet spectra in the 1200-3200 A range indicate that the extended nebular features which resemble a jet in the peculiar variable R Aquarii (M7e + pec) increased in excitation in 1985. The emission properties of the compact H II region that surrounds the unresolved binary, and those of the extended nebular jet, have been analyzed from low-resolution IUE spectra of these regions. In particular, the UV line intensities observed in the jet appear variable on a time scale of about 1.5 yr. A new accretion disk model is proposed that explains the kinematic and ionization properties of discrete components which comprise the jet emission nebulosity, the appearance of the jet in the 1980s, and morphology that uniquely characterizes the R Aquarii system at radio, optical, UV, and X-ray wavelengths. Publication: The Astrophysical Journal Supplement Series Pub Date: December 1986 DOI: 10.1086/191158 Bibcode: 1986ApJS...62..853K Keywords: Peculiar Stars; Stellar Mass Ejection; Symbiotic Stars; Ultraviolet Astronomy; Electron Density (Concentration); Emission Spectra; H Ii Regions; Iue; Line Spectra; Radio Spectra; Stellar Composition; X Ray Spectra; Astrophysics; NEBULAE: H II REGIONS; STARS: BINARIES; STARS: EMISSION-LINE; STARS: INDIVIDUAL CONSTELLATION NAME: R AQUARII; STARS: MASS LOSS; STARS: SYMBIOTIC; ULTRAVIOLET: SPECTRA full text sources ADS | data products SIMBAD (1) MAST (1)