[vsnet-chat 79] supercycle of WX Hyi?

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

Stan Walker wrote:

> I saw your note about WX Hydri. Rather than it being more active lately 
> it seems to have reverted to the earlier behaviour patterns. We looked at 
> this star from Auckland years ago - I think about the mid-1970s - looking 
> for an orbital period using pep. At that time it seemed to be bright 
> almost more often than it was faint and weekly outbursts weren't unusual. 
> 
> Not too long ago (in the last couple of years) it was suggested that WX 
> Hydri had stopped having outbursts. I'm unsure whether this was normal or 
> super, or even when the supposed cessation occurred. Was this ever true?

    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 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...

    The northern prototype, SU UMa, at least once had a spell without
outbursts at all.  Might it not resemble WX Hyi?

Regards,
Taichi Kato

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp