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J/AJ/109/1269               Streams and Disks in Binary Stars (Etzel+ 1995)
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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
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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
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(End)                                                         [CDS]  11-Jul-1995