[vsnet-chat 583] (fwd) Re: V651 Mon (Munari)

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

From munari@astras.pd.astro.it Sat Sep  6 18:44 JST 1997
Date: Sat, 6 Sep 1997 11:35:33 +0100
From: munari@astras.pd.astro.it (Ulisse Munari)
To: tkato@kusastro.kyoto-u.ac.jp
Subject: Re: [vsnet-chat 582] V651 Mon (summary of fading episode)
X-VMS-To: SMTP%"tkato@kusastro.kyoto-u.ac.jp"
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what about a dust cone surviving in the shadow of the cool component of the
binary ? Something similar happens in symbiotc Miras. The hot and luminous
white dwarf companion to the Mira prevents formation and/or surviving of 
the dust everywhere except in the shadow cone by the Mira itself.
If the orbital inclination is large enough, every orbital period the
binary is seen through the dust cone with an overall decrese in brightness
and depending of dust grain size also an increse in the reddening.
There are several well documented cases, in the optical the best one is
to the best of my knowledge V407 Cyg = Nova Cyg 1936 (Munari et al. 1990
MNRAS 242, 653). Other useful introductive literature is:

Whitelock 1987 PASP 99, 573
Munari & Whitelock 1989 MNRAS 237, 45pink
Munari 1990 MemSAIt 61, 87

            Ulisse

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