Abstract
view Abstract Citations (14) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Extended Variability of the Symbiotic Star AG Draconis Kafatos, M. ; Meier, S. R. ; Martin, I. Abstract High and low resolution IUE satellite observations of the symbiotic star AG Draconis covering the period 1979-1989 are presented, and the far-UV spectra are studied. Two extended outburst events are found to have two maxima separated by about 1600 days, a time scale not known to be associated with the star but which is about three times the binary period of the star. Semiforbidden O IV 1397-1407 emission lines intensities imply an electron density from 10 exp 10 to 10 exp 11/cu cm. The line-emitting region is found to have a linear size from 10 exp 12 to 10 exp 13 cm. The He II 1640 A Zanstra method yields T(*) = 87,000 K or greater for the hot component. The time evolution of calculated ionic abundances shows the presence of abundance peaks coincident with the outburst events and the binary phases favoring episodic mass transfers onto the compact star. Publication: The Astrophysical Journal Supplement Series Pub Date: February 1993 DOI: 10.1086/191751 Bibcode: 1993ApJS...84..201K Keywords: Stellar Spectra; Symbiotic Stars; Ultraviolet Astronomy; Variability; Accretion Disks; Emission Spectra; Iue; Astrophysics; STARS: BINARIES: GENERAL; STARS: INDIVIDUAL CONSTELLATION NAME: AG DRACONIS; ULTRAVIOLET: STARS full text sources ADS | data products SIMBAD (1) MAST (1) INES (1)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
