[vsnet-alert 6177] Re: WZ Sge: superhumps likely evolving

[Taichi Kato <tkato>]

Re: WZ Sge: superhumps likely evolving

Dear Gianluca and Colleagues,

> If I remember well, the orbital period is about 82 minutes, 
> while the period you reported here is around 80 minutes. I 
> assumed we were waiting for a period longer than Porb to 
> argue the developing of true superhumps (Patterson et al, 
> for the 1978 outburst, reported indeed a period 0.8% longer 
> than Porb). 

   Oh, thanks for the comment.  The "nominal" period (as inferred from the
period analysis) is now shorter than the orbital period.  This may be called
as "negative superhumps", but my interpretation is that the true superhump
signal is rising at a smaller phase than in early superhumps.  The net effect
seems to be observed as a "shortening of the mean period".  I will make
a more detailed analysis, using a longer baseline observations later.

Regards,
Taichi Kato
VSNET Collaboration team

VSNET Home Page

Return to Daisaku Nogami

---

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