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[vsnet-gcvs 127] (fwd) Re: [vsnet-id 550] (fwd) LMC V1864
(fwd) Re: [vsnet-id 550] (fwd) LMC V1864
From: "Mati Morel" <morel@ozemail.com.au>
Subject: Re: [vsnet-id 550] (fwd) LMC V1864
Date: Wed, 2 Jan 2002 14:23:23 +1100
>
> From: "Sebastian Otero" <varsao@fullzero.com.ar>
> Date: Mon, 31 Dec 2001 18:52:02 -0300
> Subject: [vsnet-chat 4977] Identifications for an LMC variable
>
> While preparing a PEP(V) chart for S Doradus and the surrounding area, I
> stumbled upon a couple of variable stars that seems to be identified with
> two LMC variables.
>
>
> It's:
>
> LMC V1864 - SR - 129 d. - 12.4 (0.5) I = 05h 16m 41.69s -6837' 39.3"
> (2000.0) [From the Catalogue of Extragalactic Variables included in the
> GCVS]
>
> Which seems to be in the same position as HDE 269279 = GSC 9162 00840 =
05h
> 16m 41.77s -6837' 34.8" (2000.0) [Position from Tycho 2]
> This one seems to be variable according to a couple of measurements ( V=
> 10.235, B-V= 0.235 and V= 10.30, B-V= 0.22) included in the GCPD
> (http://obswww.unige.ch/gcpd/indexform.html). Tycho 2 gives V= 10.42)
>
> The problem is that the spectral type (SIMBAD) for this star is F0 and
with
> a B-V of 0.2 is obviously not an SR star as stated in the first catalogue.
> Is it the same star?
>
Hi all,
I have checked the published finder chart for LMC V1864 =
SHV0516559-684047. It is on p1672 of the paper by Shaun M.G. Hughes
(Astron.J 97, no. 6,1634, 1989). It certainly agrees with HDE 269279.
However, the characters of the two stars are completely different. HDE
269279 is a foreground F0 star (V=10.235, B-V = 0.237, U-B = 0.142 acc. to
Gochermann et al Astron. Astrophys. 99,591, 1993), while Hughes's star is a
red LMC variable, apparently, found in a survey using IR plates. The
variability data is all in Ic magnitudes. This does not make sense. Could
Hughes's star be a close companion to HDE 269279, and not clearly identified
in his finder chart?
Regards,
Mati
morel@ozemail.com.au
http://vsnet.ozemail.com.au/~morel
vsnet-adm@kusastro.kyoto-u.ac.jp
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