The H-alpha emitting regions of the accretion disks in ALGOLS

Details The H-alpha emitting regions of the accretion disks in ALGOLS The H-alpha emitting regions of the accretion disks in ALGOLS

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ssrv...50....9p&link_type=abstract

(IAU, NSERC, Canadian Institute of Theoretical Astrophysics, et al., Colloquium on Algols, 107th, Sidney, Canada, Aug. 15-19, 19

Astronomy and Astrophysics

Astrophysics

41

Accretion Disks, Binary Stars, H Alpha Line, Space Plasmas, Stellar Envelopes, Stellar Mass Accretion, Charge Coupled Devices, Line Spectra

Scientific paper

Phase-resolved, high-dispersion CCD and image tube detector data are used to study the circumstellar plasma that produces H-alpha emission in Algol binaries. Disk geometry and size, asymmetry in the distribution of material, long-term and nonphase dependent variability, mass outflow, and mean electron density are discussed. Also, variations in the system's properties with the system's period or location in the r-q diagram are considered. Five systems with periods between 4.5 and 261 days are examined. No permanent disks are found in binaries with periods less than 4.5 days. For periods greater than 6 days, stable disks with only slight long-term variations in their H-alpha brightness are observed.

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