Re: HD 116274

[Doug Welch <welch@physics.mcmaster.ca>]

Mike et al,

It is worth noting that, despite their abundance, there is still not
a *single* binary RR Lyr known. (The evidence for TU UMa is not
compelling.) If you see flattening at minimum, another possible
explanation is binarity (or, strictly speaking, additional light
in the same resolving element).

So, keep your eyes peeled for binary RR Lyrae candidates - they would
be a find!

Cheers,
Doug

On Tue, 13 May 2003, Michael Koppelman wrote:

> I caught a minimum on this one last night and phased it with the 
> previous night. See:
> 
> http://www.lolife.com/astronomy/hd116274/hd116274_phase.jpg
> 
> This could easily be 1/2 of the period. It's still really rough. If you 
> double the period, the two nights don't move in relation to each other, 
> so they are part of the same part of the curve (assuming 0.3 and/or 0.6 
> is in the ballpark).
> 
> If the period is 0.3, it may be another RR Lyr star. If it's 0.6, the 
> eclipse could have some flatness at the bottom.
> 
> Cheers,
> Michael Koppelman
>