2011A&A...529A..48K


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:20:32

2011A&A...529A..48K - Astronomy and Astrophysics, volume 529A, 48-48 (2011/5-1)

A molecular cloud within the light echo of V838 Monocerotis.

KAMINSKI T., TYLENDA R. and DEGUCHI S.

Abstract (from CDS):

V838 Mon is an eruptive variable, which exploded in 2002. It displayed the most spectacular light echo ever observed. However, neither the origin of the reflecting matter nor the nature of the 2002 outburst have been firmly constrained. We investigate the nature of the CO radio emission detected in the field of the light echo. In particular, we explore its connection to the echoing dust around V838 Mon. We observed the echo region in multiple CO rotational transitions. We present and analyse maps of the region obtained in the 12CO(1-0) and (3-2) lines. In addition, deep spectra at several positions were acquired in 12CO(1-0), (2-1), (3-2), and 13CO(1-0), (2-1). Radiative transfer modelling of line intensities is performed for chosen positions to constrain the kinetic temperatures and densities. We derive global parameters (e.g. mass, distance, total column density) of the emitting cloud. We found that a compact molecular cloud is located within the echo region. The molecular emission is physically connected to the dusty environment seen in the optical echo and they both belong to the same translucent cloud. The interstellar nature of the cloud is confirmed by its high mass of 90-150M. We propose that the cloud consists of material remaining after the formation of the cluster to which V838 Mon belongs. This indicates that the eruptive star has a young age (3-10Myr).

Abstract Copyright:

Journal keyword(s): stars: individual: V838 Monocerotis - ISM: clouds - ISM: molecules - radio lines: ISM - ISM: structure

Simbad objects: 8

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Number of rows : 8

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 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2979 0
2 RAFGL 618 pA* 04 42 53.6245215366 +36 06 53.397219192   16.32   12.59   C-rich 954 0
3 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2001 1
4 V* V838 Mon CV* 07 04 04.8222936785 -03 50 50.637499515   15.5   15.18 14.51 M10+B3V 371 0
5 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2134 0
6 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2505 0
7 NAME Outer Arm PoG 21 48 +69.4           ~ 221 0
8 NAME Norma-Cygnus Arm reg ~ ~           ~ 73 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-02:20:32

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