Infrared light curves of the dwarf nova Z Chamaeleontis
Open Access
- 1 September 1981
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 196 (2) , 121-128
- https://doi.org/10.1093/mnras/196.2.121
Abstract
Infrared light curves of the eclipsing dwarf nova Z Cha are presented. The light curves differ from the optical light curves of this system in showing a much shallower primary eclipse, and in showing a secondary minimum which is not present in the optical. The light curves can be understood if the late-type secondary star contributes a substantial proportion of the infrared radiation. The secondary has not previously been directly observed in a dwarf nova with such a short period. From the infrared colours of the secondary it is found to be a very cool M dwarf. The K magnitude of the secondary is used to derive the distance of Z Cha giving d = 125 pc.Keywords
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