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IRAS 18153-1651: an HII region with a possible wind bubble blown by a young main-sequence B star

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Title: IRAS 18153-1651: an HII region with a possible wind bubble blown by a young main-sequence B star
Authors: Gvaramadze, VV
Mackey, J
Kniazev, AY
Langer, N
Chene, A-N
Castro, N
Haworth, TJ
Grebel, EK
Item Type: Journal Article
Abstract: We report the results of spectroscopic observations and numerical modelling of the H II region IRAS 18153−1651. Our study was motivated by the discovery of an optical arc and two main-sequence stars of spectral type B1 and B3 near the centre of IRAS 18153−1651. We interpret the arc as the edge of the wind bubble (blown by the B1 star), whose brightness is enhanced by the interaction with a photoevaporation flow from a nearby molecular cloud. This interpretation implies that we deal with a unique case of a young massive star (the most massive member of a recently formed low-mass star cluster) caught just tens of thousands of years after its stellar wind has begun to blow a bubble into the surrounding dense medium. Our 2D, radiation-hydrodynamics simulations of the wind bubble and the H II region around the B1 star provide a reasonable match to observations, both in terms of morphology and absolute brightness of the optical and mid-infrared emission, and verify the young age of IRAS 18153−1651. Taken together our results strongly suggest that we have revealed the first example of a wind bubble blown by a main-sequence B star.
Issue Date: 14-Dec-2016
Date of Acceptance: 12-Dec-2016
URI: http://hdl.handle.net/10044/1/48007
DOI: https://dx.doi.org/10.1093/mnras/stw3257
ISSN: 0035-8711
Publisher: Oxford University Press
Start Page: 1857
End Page: 1867
Journal / Book Title: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume: 466
Issue: 2
Copyright Statement: © 2016 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
circumstellar matter
stars: massive
stars: winds
outflows
ISM: bubbles
HII regions
ISM: individual objects: IRAS 18153-1651
DARK CLOUD G14.225-0.506
WOLF-RAYET STARS
H-ALPHA SURVEY
ATMOSPHERIC NLTE-MODELS
GALACTIC PLANE
II REGIONS
BLUE STARS
SKY SURVEY
SPECTROSCOPIC ANALYSIS
INTERSTELLAR BUBBLES
0201 Astronomical And Space Sciences
Publication Status: Published
Open Access location: https://arxiv.org/pdf/1612.03916.pdf
Appears in Collections:Physics
Astrophysics



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