J/AJ/109/1269 Streams and Disks in Binary Stars (Etzel+ 1995)
O I Lambda 7774 Absorption as a Tracer of Streams and Disks in
Nondegenerate Binary Stars
Etzel P.B., Olson E.C., Senay M.C.
<Astron. J. 109, 1269 (1995)>
=1995AJ....109.1269E 1995AJ....109.1269E
ADC_Keywords: Binaries, eclipsing ; Equivalent widths ; Radial velocities
Abstract:
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 nondegenerate 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 infall superimposed on disk rotation in most long-period
systems. We speculate that infall may be related to viscous
dissipation in disks. We emphasise the great sensitivity of lambda
7774 in studying the kinematics of circumstellar matter in many
nondegenerate binary stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 64 589 Equivalent widths and radial velocities
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Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1-10 A10 --- Name Variable star name
11-30 A20 --- UT UT date and time of observation
31-41 F11.5 d HJD Heliocentric Julian Date of observation
42-49 F8.5 --- Phase [0/1[ Phase
50-56 A7 0.1nm EW Absorption equivalent width
57-64 A8 km/s RV Radial velocity
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Origin: AAS CD-ROM series, Volume 4, 1995 Lee Brotzman [ADS] 03-May-1995
(End) [CDS] 11-Jul-1995