[vsnet-chat 32] Re: triple outburst of GO Com

[Erik Kuulkers <e.kuulkers1@physics.oxford.ac.uk>]

Taichi Kato wrote:
>     I believe V1028 Cyg has an outburst amplitude exceeding 6 magnitude
> based on the recent quiescent estimate.  Doesn't it well deserve a TOAD?
> Or should we modify slightly the TOAD definition?

Defining a SU UMa star as a TOAD (or, equivalently, a WZ Sge star) SOLELY
basing it on outburst magnitude is not the right way to classify it as a 
TOAD. In addition the star should exhibit long intervals between 
superoutbursts (years to decades) with almost no normal outbursts.
Note that this does not imply that the TOADs should be regarded as a 
completely new CV-group. They are most probably the extreme end of
normal SU UMa stars.
The bright superoutburst and subsequent rebrightenings in V1028 Cyg 
occurred after a long quiescent period and may in this respect resemble 
TOADs. However, this star also show periods of regular normal and  
superoutburst behaviour.
V1028 Cyg, and a similar system, SW UMa, may be the bridge between 
normal SU UMa's and TOADs.

Erik Kuulkers

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