2003A&A...411..465R


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST12:50:01

2003A&A...411..465R - Astronomy and Astrophysics, volume 411, 465-475 (2003/12-1)

Shocked gas layers surrounding the WR nebula NGC2359.

RIZZO J.R., MARTIN-PINTADO J. and DESMURS J.-F.

Abstract (from CDS):

NGC 2359 is a Wolf-Rayet (W-R) nebula partially bound by a rather dense and warm molecular cloud. We present the results derived from CO and 13CO fully sampled maps of the molecular material with angular resolutions up to 12". We have detected three different velocity components, and determined their spatial distribution and physical properties. The kinematics, morphology, mass and density are clearly stratified with respect to the W-R star. These features allow us to learn about the recent evolutionary history of HD 56925, because the multiple layers could be associated to several energetic events which have acted upon the surrounding circumstellar medium. Hence, a careful study of the different shockfronts contain clues in determining the present and past interaction of this evolved massive star with its surroundings. From the analysis of the mass-loss history in massive stars like HD 56925, we suggest that the multiple layers of shocked molecular gas are likely to be produced during the earlier LBV phase and/or the actual W-R stage of HD 56925.

Abstract Copyright:

Journal keyword(s): stars: individual: HD 56925 - stars: Wolf-Rayet - stars: winds, outflows - ISM: bubbles - ISM: individual objects: NGC 2359 - ISM: kinematics and dynamics

Simbad objects: 4

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Number of rows : 4

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 HD 56925 WR* 07 18 29.1313276537 -13 13 01.513156589 11.21 11.74 11.56 11.40   WN4b 154 0
2 NGC 2359 HII 07 18 30.000 -13 13 36.00           ~ 156 0
3 HD 191765 WR* 20 10 14.1929815789 +36 10 35.069005168 7.64 8.08 8.08     WN6-s 419 0
4 NGC 6888 ISM 20 12 07 +38 21.3   7.44       WN6b(h) 257 1

    Equat.    Gal    SGal    Ecl

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2020.07.12-12:50:01

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