[vsnet-chat 2601] Re: TmzV85 Eclipse Elements?

[Taichi Kato <tkato>]

Re: [vsnet-chat 2600] TmzV85 Eclipse Elements?

> Has anyone actually posted eclipse elements for this object as yet, and
> it's just that I've missed it?

   In vsnet-alert 4048, eclipse predictions are given.

   http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/alert4000/msg00048.html

   We have not yet presented an eqation like Epoch + P * E, in order to
avoid excessive extrapolations.  We may be able to refine the element after
finishing the entire run (and probably some quiscence runs).

> Memory tells me that UGSU stars are likely to have slightly different
> elements per outburst.  Is memory right, and is this related to the disk
> precession models?

   Slightly different "superhump" clocks per outburst by the mechanism
quoted.  Eclipses are more regular but have finite varying O-C's, which
are caused by assymmetric disk light.

   By the way, TmzV85 has made the (long expected and sought) first-ever
simutaneous discovery of eclipses and superhumps in the history of CVs.
The other deeply eclipsing SU UMa stars are Z Cha (eclipse discovered in
quiescence), OY Car (eclipse discovered during the rise to a normal
outburst, cf. IAUC 3357), HT Cas, DV UMa, V2051 Oph (eclipse discovered
in quiescence).

Regards,
Taichi Kato

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