2006A&A...451..223T


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.31CET12:48:22

2006A&A...451..223T - Astronomy and Astrophysics, volume 451, 223-236 (2006/5-3)

Eruptions of the V838 Mon type: stellar merger versus nuclear outburst models.

TYLENDA R. and SOKER N.

Abstract (from CDS):

We discuss various models and scenarios proposed to explain the nature of the V838 Mon type eruptions. In this class of eruptive objects we include: M31 RV (erupted in 1988), V4332 Sgr (erupted in 1994) and V838 Mon (erupted in 2002). We concentrate on three models: (i) thermonuclear runaway on an accreting white dwarf (nova-like event); (ii) He-shell flash in a post asymptotic giant branch star (born-again AGB); and (iii) merger of stars. We show that models (i) and (ii) cannot account for the majority of the observed properties of the objects. Most significantly, in both nuclear burning type models the object is expected to heat up before declining and fade as a very hot compact star. In the observed eruptions the objects declined as very cool giants or supergiants. We show that the stellar merger model can account for all the observed properties and conclude that presently this is the most promising model to explain the eruptions of the V838 Mon type.

Abstract Copyright:

Journal keyword(s): stars: supergiants - stars: binaries: general - stars: pre-main sequence - stars: mass loss - stars: variables: general - stars: general

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11057 1
2 NAME M31 RV No* 00 43 02.433 +41 12 56.17           M0 102 0
3 V* GK Per No* 03 31 12.0096626899 +43 54 15.467450081   10.2 14.0     K1IV 870 0
4 V* V838 Mon CV* 07 04 04.8222936785 -03 50 50.637499515   15.5   15.18 14.51 M10+B3V 376 0
5 V* V4334 Sgr NL* 17 52 32.69 -17 41 08.0   12.01       F2Ia 330 0
6 NOVA Sgr 1943 No* 18 09 05.8471212448 -25 59 08.078050823           ~ 30 0
7 V* V4332 Sgr CV* 18 50 36.6959119600 -21 23 28.927014456         14.37 K8/M0e 146 0
8 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 288 0
9 V* CK Vul CV* 19 47 37.9563868576 +27 18 41.788878128           ~ 109 0
10 Hen 1-5 pA* 20 11 56.06832 +20 20 04.4916 11.41 10.66 9.45     G8/K0Iae 489 1
11 V* HR Del No* 20 42 20.3467536529 +19 09 39.304605595   12.46 3.70 12.69   ~ 465 0
12 NAME Galactic Bulge reg ~ ~           ~ 3461 0

    Equat.    Gal    SGal    Ecl

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2020.10.31-12:48:22

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