A modern view of the dwarf nova Z Chamaeleontis

Details A modern view of the dwarf nova Z Chamaeleontis A modern view of the dwarf nova Z Chamaeleontis

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.131..507w&link_type=abstract

(IAU, Colloquium on Cataclysmic Variables. Recent Multi-Frequency Observations and Theoretical Developments, 93rd, Bamberg, West

Astronomy and Astrophysics

Astrophysics

1

Cataclysmic Variables, Dwarf Novae, Eclipsing Binary Stars, Stellar Spectrophotometry, White Dwarf Stars, Mass Transfer, Radial Velocity, Stellar Composition, Stellar Evolution

Scientific paper

Some recent photometric and spectroscopic results for this system are summarized, and several consequences of these results are pointed out: The space motion of Z Cha is characteristic of the old disk population. The white dwarf cannot be composed primarily of He, unless it grew by accretion by at least 20%. The inferred masses of the component stars, combined with the usual gravitational quadrupole formula, probably do not suffice to explain the inferred rate of mass transfer, even in quiescence. The secondary star does not lie on the computed evolutionary tracks in the period-mass diagram of Paczynski and Sienkiewicz.

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