[vsnet-chat 710] Re: CVs in triple systems?

[Taichi Kato <tkato>]

Timo Kinnunen wrote:

>   As far as I know, no known cataclysmic binary has
> been appended by a third star. Are there any theories on this,
> can such systems exist in the observable neighbourhood?

  At least one CV is in a triple system, CQ Dra B.  Some suggestions have
been given for other CVs from eg. O-C variation of eclipse timings (IP Peg),
multiple periodicities (as in HR Lyr), but to my knowledge none of them
have been confirmed directly.

  It is well known triple-system models are suggested for some symbiotic
binaries.

Regards,
Taichi Kato

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