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

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 two-dimensional, 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.

12 pages, 10 figures, accepted for publication in MNRAS

References in corpus (9)

• Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
• Mass loss from hot massive stars
• The UKIDSS Galactic Plane Survey
• The metallicity extremes of the Sagittarius dSph using SALT spectroscopy of PNe
• Wind bubbles within H II regions around slowly moving stars
• Spectroscopy of two PN candidates in IC10
• Radiation-hydrodynamical simulations of massive star formation using Monte Carlo radiative transfer: I. Algorithms and numerical methods
• Magnetically Dominated Parallel Interstellar Filaments at the Infrared Dark Cloud G14.225-0.506
• Discovery of a new Wolf-Rayet star and a candidate star cluster in the Large Magellanic Cloud with Spitzer

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