[vsnet-j 2341] V838 Mon

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

V838 Mon

　新しい解釈が提唱されました。星の衝突合体ではないか、とも ??

＃距離の推定(すなわち Munari et al. の解釈)はまだ不定性が大きい感じですね

Paper: astro-ph/0210463
From: Soker Noam <soker@physics.technion.ac.il>
Date: Mon, 21 Oct 2002 13:45:12 GMT   (9kb)

Title: Main-sequence stellar eruption model for V838 Mon
Author: Noam Soker (Dept. of Physics, Oranim, Israel), Romuald Tylenda
  (Copernicus Astronomical Center, Poland)
Comments: 9 pages
\\
  We propose that the energy source of the outburst of V838 Mon and similar
objects is an accretion event, i.e., gravitational energy rather than
thermonuclear runaway. We show that the merger of two main sequence stars, of
masses 1.5 Mo and 0.1-0.5 Mo can account for the luminosity, large radius, and
low effective temperture of V838 Mon and similar objects. Subsequent cooling
and gravitational contraction lead such objects to move along the Hayashi
limit, as observed. By varying the masses and types of the merging stars, and
by considering slowly expanding, rather than hydrostatic, envelopes, this model
can account for a large range in luminosities and radii of such outburst
events.
\\ ( http://arXiv.org/abs/astro-ph/0210463 ,  9kb)

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