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[vsnet-chat 95] Re: EG Cnc - first one?
- Date: Mon, 17 Feb 1997 20:24:45 +0000 (GMT)
- To: Fraser Farrell <fraserf@dove.net.au>
- From: Erik Kuulkers <e.kuulkers1@physics.oxford.ac.uk>
- Subject: [vsnet-chat 95] Re: EG Cnc - first one?
- cc: astroman@voyager.co.nz, vsnet-chat@kusastro.kyoto-u.ac.jp
- In-Reply-To: <199702161235.XAA27831@dove.mtx.net.au>
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
On Sun, 16 Feb 1997, Fraser Farrell wrote:
> Subject: [vsnet-chat 84] Re: EG Cnc - first one?
> I speculate that EG Cnc may represent an extreme example - decades of
> inactivity, then months (years??) of vigorous activity, then inactivity
> again. Perhaps this should be part of the definition of ER UMa stars?
> I await discussion from our professional readers!
My understanding is that the ER UMa stars show much longer timescales of
very frequent outbursting behaviour than the more than 2 months activity
of EG Cnc. The ER UMa stars also show various supercycles after each
other on short timescales, whereas the EG Cnc and systems alike (TOADs or
WZ Sge stars) several short outbursts after a superoutburst and then
nothing for a long time thereafter, i.e. they have very long supercycle
times.
Erik Kuulkers
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