Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.8503e&link_type=abstract
American Astronomical Society, 185th AAS Meeting, #85.03; Bulletin of the American Astronomical Society, Vol. 26, p.1460
Astronomy and Astrophysics
Astronomy
Scientific paper
We propose a new spectroscopic approach for observing circumstellar matter in binary stars, based on the neutral oxygen lambda 7774 absorption lines. We present oxygen equivalent widths and radial velocities in 20 non-degenerate eclipsing binaries. We note limitations and advantages of using this line to trace circumstellar matter in binary systems, and confirm the presence of streams and rotating accretion disks in a number of short- and long-period Algol systems. We discuss evidence for geometrically thick disks, and describe a small radial in-fall superimposed on disk rotation in most long-period systems. We speculate that in-fall may be related to viscous dissipation in disks. We emphasize the great sensitivity of lambda 7774 in studying the kinematics of circumstellar matter in many non-degenerate binaries.
Etzel Paul B.
Olson Edward C.
Senay Matthew C.
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