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Systematics of Dwarf Novae

Published online by Cambridge University Press:  12 April 2016

B. Warner
B. Warner*
Affiliation:
Department of Physics and Astronomy , Dartmouth College, N.H. , USAand Department of Astronomy , University of Cape TownRondebosch, S. Africa

Abstract

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From about 30 Dwarf Novae with the best determined distances the following relationships are found.

  1. (i) a tight correlation between absolute magnitude at maximum light, Mv (max), and orbital period, P.

  2. (ii) a correlation between Mv (min) and P showing wide scatter.

  3. (iii) a correlation between Mv (mean), the mean absolute magnitude averaged over normal outbursts, and P, again with wide scatter. The scatter is shown to correlate strongly with outburst timescale Tn.

  4. (iv) a strong correlation between range, Mv (min) - Mv (max), and Tn (the Kukarkin-Parenago relationship).

  5. (v) a strong correlation between range My. (mean) - Mv (max), and both Tn and P.

This final correlation is interpreted in terms of the disc instability model of dwarf novae and successfully predicts the observed width of outburst versus P relationship.

Type
Introductory Review
Information
International Astronomical Union Colloquium , Volume 93: Cataclysmic Variables: Recent Multi-Frequency Observations and Theoretical Developments , 1987 , pp. 3 - 13
Copyright
Copyright © Reidel 1987

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