[vsnet-alert 3307] (fwd) Re: MisV0134 = NSV11661

[Taichi Kato <tkato>]

(fwd) Re: [vsnet-alert 3305] MisV0134 = NSV11661

Date: Thu, 29 Jul 1999 21:02:36 -0700
From: bas@lowell.Lowell.Edu (Brian Skiff)
Subject: Re: [vsnet-alert 3306] Re: MisV0134 = NSV11661

     It is also not usual for Mira or other long-peiod variables (AGB stars)
to have IRAS 12/25mu flux ratio so close to 1.0 (0.67/0.59 for this IRAS
source).  Generally this ratio is at least 1.5 if not larger.  This is
perhaps some sort of composite object, or perhaps an OH/IR star in transition
to a planetary nebula.  The lack of 60- or 100-micron detection almost
certainly excludes a galaxy or compact nebula or some sort.  See the diagram
in Figure 1 of Zijlstra et al 1990, A&A Suppl 82,273 for a rough idea of
what sorts of objects fall where in the IRAS two-color diagram.

\Brian

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