[vsnet-chat 91] Re: supercycle of WX Hyi?

[Fraser Farrell <fraserf@dove.net.au>]

G'day all,

On 1997-02-15 tkato@kusastro.kyoto-u.ac.jp said:
   >What are the current and past supercycle lengths of WX Hyi?
   >Ritter's CV catalogue lists typical recurrence times of normal- and
   >superoutbursts as 14 and 140 days, respectively.  As a northerner

Ritter's supercycle looks about right, but the normal cycle is now
noticeably quicker than 14 days.  In fact WX Hyi is now going off so
frequently that my local observers no longer consider outbursts to be
worth telephoning me about!

   >with no chance to watch the object, I have suspected WX Hyi is one
   >of dwarf novae having the shortest supercycle lengths, thus close
   >to ER UMa stars.  Reading discussions things may not be that simple.

I think there may be a continuum of possible CV systems, ranging from
the ER UMa's (or even X-ray bursters?) through the "normal" UG's to the
NR's and right out to the "hibernating" novae.  However, our recognition
of the rapid systems has been rather belated ( _V1159_ Ori??) and I'm
sure there are more of them; misclassified in the GCVS.

Maybe if any of these systems was observed for several hundred/thousand
outburst cycles; it might be discovered that all of them go through a
very long period cycle of few/no outbursts and "frequent" outbursts??

Just speculating.... :)


cheers,

Fraser Farrell
Variable Stars Group
Astronomical Society of South Australia

WWW: http://vsnet.gist.net.au/assa/   email: fraserf@dove.net.au
traditional:  GPO Box 199, Adelaide, SA 5001, Australia

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