Re: Red stars that get redder

[Michael Sallman <msallman@pro-ns.net>]

Thanks to Patrick Wils for pointing out to me the close companions of these 2 
stars. Which would also explain why the published ranges for the 2 stars are so 
much larger than what TASS observed.
I figured it was something obvious, just not that obvious. :-(

Mike

Michael Sallman wrote:
> I've run across a couple of M variable stars in the database that look to
> have significantly larger Ic amplitudes than V. I thought that normally 
> their
> amplitudes were greater in V. What would cause this phenomenon?
> 
> The stars are GY Del:
> http://sallman.tass-survey.org/servlet/markiv/template/TassPlot.vm?object_id=2870811 
> 
> and V0646 Cyg:
> http://sallman.tass-survey.org/servlet/markiv/template/TassPlot.vm?object_id=3773712 
> 
> 
> Lokking at the ROTSE/NSVS data for V0646 Cyg, it also has a smaller 
> amplitude
> than TASS Ic, though it's only 1 cycle:
> http://skydot.lanl.gov/nsvs/star.php?num=5925853&mask=32004
> 
> I also checked Simbad and Google, but didn't find anything on these stars.
> 
> Thanks,
> Mike
> 
> 
> 
> 
> 
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