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The 71-Second Oscillation of DQ Her at 2180 Å

Published online by Cambridge University Press:  12 April 2016

E. L. Robinson ,
E. Zhang ,
R. C. Bless ,
J. F. Dolan ,
J. L. Elliot  and
G. W. van Citters
E. L. Robinson
Affiliation:
Department of Astronomy, University of Texas, Austin, TX 78712, USA
E. Zhang
Affiliation:
Department of Astronomy, University of Texas, Austin, TX 78712, USA
R. C. Bless
Affiliation:
Department of Astronomy and Space Astronomy Laboratory, University of Wisconsin, Madison, WI 53706, USA
J. F. Dolan
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
J. L. Elliot
Affiliation:
Department of Earth, Atmospheric, and Planetary Sciences and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
G. W. van Citters
Affiliation:
Division of Astronomical Sciences, National Science Foundation, 4201 Wilson Blvd. Arlington, VA 22230, USA

Abstract

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The 71-s modulation in the light curve of the old nova DQ Her has a mean semi-amplitude of 1.8% at 2180 Å, although the amplitude varies by at least a factor of two from orbit to orbit. The disturbance in the amplitude and phase of the modulation during eclipses is similar to that observed at visual wavelengths. We conclude that at 2180 Å, as at visual wavelengths, the modulated flux is reprocessed and comes from the accretion disk.

Type
Intermediate Polars
Information
International Astronomical Union Colloquium , Volume 158: Cataclysmic Variables and Related Objects , 1996 , pp. 173 - 176
Copyright
Copyright © Kluwer 1996

References

1. Patterson, J., Robinson, E.L., Nather, R.E., 1978, Ap. J., 224, 570 Google Scholar
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3. Zhang, E., Robinson, E.L., Stiening, R.F., Horne, K., 1996, Ap. J., in pressGoogle Scholar