[vsnet-campaign-v838mon 377] V838 Mon paper from astro-ph

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

V838 Mon paper from astro-ph

   Readers will perhaps find it interesting:

Paper: astro-ph/0208522
From: Stefan Kimeswenger <Stefan.Kimeswenger@uibk.ac.at>
Date: Thu, 29 Aug 2002 08:43:58 GMT   (72kb)

Title: The peculiar variable V838 Mon
Authors: S. Kimeswenger, C. Lederle, S. Schmeja, B. Armsdorfer (University
  Innsbruck)
Comments: 5 pages, 5 EPS figures, accepted for MNRAS pink pages (letter)
\\
  V838 Mon underwent, after a first nova-like outburst in January and a usual
decline, a second outburst after one month, and a third weak one again a month
later. Moreover a very small increase of the temperature at the beginning of
April gives us a hint on a physical process with a period of one month. We
obtained a BVRIc time sequence and modelled the photometric behaviour of the
object. This leads us to the conclusion that the interstellar foreground
extinction has to be 0.6 < E(B-V) < 0.8 and that the quasi-photosphere had
persistently unusually low temperatures for nova-like systems. The photometry
was used to follow the dramatic changes of the expansion. While the appearing
10 micron excess can be well described by the heating of material ejected
during this event, the IRAS emission near the location of the progenitor,
originates most likely from dust, which were formed during the previous
evolution of the object. Assuming that the light echoes are coming from
circumstellar material, the distance is 640 to 680 pc - smaller than the 790 pc
given in Munari et al. (2002). In our opinion V838 Mon and V4332 Sgr are
manifestations of a new class of eruptive variables. We do not count M31 RV to
this class.
\\ ( http://arXiv.org/abs/astro-ph/0208522 ,  72kb)

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