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HST FOS Observations of YY Dra

Published online by Cambridge University Press:  12 April 2016

Carole A. Haswell  and
Joseph Patterson
Carole A. Haswell
Affiliation:
Columbia University, 538 W. 120th St., NY, NY 10027, USA
Joseph Patterson
Affiliation:
Columbia University, 538 W. 120th St., NY, NY 10027, USA

Abstract

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The UV continuum of YY Dra exhibits a sinusoidal modulation with 15.5% semi-amplitude and period 264.7 s, commensurate with one half the white dwarf spin period. The Civ line profile varies with spin phase, implying accretion onto, and visibility of, both magnetic poles. The line width is greatest at the phases of continuum pulsation maximum, when the wings extend out to ±3000 km s−1. This implies a minimum white dwarf mass of 0.62 M⊙, and constrains the angle between the line of sight and the magnetic axis.

Type
Intermediate Polars
Information
International Astronomical Union Colloquium , Volume 158: Cataclysmic Variables and Related Objects , 1996 , pp. 169 - 172
Copyright
Copyright © Kluwer 1996

References

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