[vsnet-newvar 1708] Re: [vsnet-unknown 113] Re: [vsnet-campaign-unknown 133] MisV1147 Spectral Type

["Stan Walker" <astroman@xtra.co.nz>]

Greetings,

What are the coordinates for this star? Is it in an obscured region? As soon
as I saw Doug's post I considered interstellar reddening - but it would have
to be dramatically reddened to get the B-V, U-B combination - about a
magnitude in both colours. Even objects in the eta Carinae region are only
reddened by about half a magnitude. Then there would be impossibly large R
and I excesses for such a blue object. So maybe Doug hasn't considered
interstellar reddening but his answer fits the colours.

Regards,
Stan


----- Original Message -----
From: "Taichi Kato" <tkato@kusastro.kyoto-u.ac.jp>
To: <vsnet-campaign-unknown@ooruri.kusastro.kyoto-u.ac.jp>;
<vsnet-unknown@ooruri.kusastro.kyoto-u.ac.jp>
Cc: <vsnet-newvar@ooruri.kusastro.kyoto-u.ac.jp>
Sent: Friday, December 06, 2002 2:57 PM
Subject: [vsnet-unknown 113] Re: [vsnet-campaign-unknown 133] MisV1147
Spectral Type


> Re: [vsnet-campaign-unknown 133] MisV1147 Spectral Type
>
> > B-V implies K0 spectral type
> > U-B implies A5 or G0 spectral type
> >
> > From M.S. Bessell, PASP, 91:589-607, October 1979
> >
> > V-Ic=1.186 implies K4V or K2III
> >
> > These colors are not consistent with a single star which leads credence
to
> > the possibility previously discussed that this is a binary system.
>
>     Please don't neglect interstellar reddening.
>
> Regards,
> Taichi Kato
>

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