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Theory and Observations of Accretion Disc Spectra

Published online by Cambridge University Press:  12 April 2016

S.K. Mayo ,
D.T. Wickramasinghe  and
J.A.J. Whelan
S.K. Mayo
Affiliation:
Royal Greenwich Observatory, Hailsham, U.K. Institute of Astronomy, Cambridge, U.K.
D.T. Wickramasinghe
Affiliation:
Institute of Astronomy, Cambridge, U.K. Department of Applied Mathematics, Australian National University, Canberra, Australia
J.A.J. Whelan
Affiliation:
Institute of Astronomy, Cambridge, U.K.

Extract

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Theoretical continua (3000 ≲ λ (Å) ≲ 20000), UBV colours and Balmer absorption line profiles (Hα – Hδ) have been computed for the optically thick parts of steady-state accretion discs around white dwarfs as a function of mass flow rate, mass of white dwarf and inclination angle. The uncertainties due to disc z-structure and outer radius and viscosity are considered.

The theoretical results for continua and UBV colours are compared with the theoretical results of Schwarzenberg-Czerny and Rózyczka (1977) and Herter et al. (1979) and with results obtained using black bodies instead of stellar atmospheres (e.g. Lynden-Bell 1969). Where models can be directly compared the quantitative agreement is good.

Type
Colloquium Session VI
Information
International Astronomical Union Colloquium , Volume 53: White Dwarfs and Variable Degenerate Stars , August 1979 , pp. 404 - 405
Copyright
Copyright © The University of Rochester 1979

References

Herter, T., Lacasse, M.G., Wesemael, F. and Winget, D.E. 1979. Astrophys. J.Suppl., 39, 513.CrossRefGoogle Scholar
Lynden-Bell, D. 1969. Nature, 233, 690.CrossRefGoogle Scholar
Mayo, S.K. 1979. Ph.D. Thesis in preparation. University of Cambridge.Google Scholar
Mayo, S.K., Wickramasinghe, D.T. and Whelan, J.A.J. 1978. IAU Coll. 46, Hamilton, New Zealand.Google Scholar
Mayo, S.K., Wickramasinghe, D.T. and Whelan, J.A.J. 1979. Submitted to M.N.R.A.S.Google Scholar
Schwarzenberg-Czerny, A. and Rózyczka, M. 1977. Acta Astr., 27, 429.Google Scholar
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