Abstract
view Abstract Citations (15) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Rapid H(alpha) Emission Variations in Accretion Disks in Long-Period ALGOLS Olson, Edward C. ; Etzel, Paul B. Abstract We demonstrate the continuous presence of large variations in double-peaked H-alpha long period Algol-type binaries, using recently obtained CCD spectra. Most fluctuations occur on a time scale less than or = an orbital period and a steady state in H-alpha emission ia never reached. In AD Her (P = 10 d), H-alpha emission dropped in strength more than a factor of five in one seven-day interval. Contemporay O I lambda observations showed no significant changes in oxygen absorption strength or radial velocity during this time. We tentatively suggest that H-alpha variations arise from an inner-disk instability, possibly triggered by small modulations in the mass-transfer rate. This behavior is reminiscent of some cataclysmic variables. Publication: The Astronomical Journal Pub Date: March 1995 DOI: 10.1086/117362 Bibcode: 1995AJ....109.1308O Keywords: Accretion Disks; Eclipsing Binary Stars; H Alpha Line; Mass Flow Rate; Stability; Stellar Orbits; Variability; Charge Coupled Devices; Radial Velocity; Spectrum Analysis; Stellar Spectrophotometry; Astronomy; BINARIES: SPECTROSCOPIC; CIRCUMSTELLAR MATTER; ACCRETION DISKS full text sources ADS | data products SIMBAD (11) CDS (1)
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.
