Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311l..81f&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 311, Dec. 15, 1986, p. L81-L84. Research supported
Astronomy and Astrophysics
Astrophysics
31
Molecular Clouds, Near Infrared Radiation, Spectral Energy Distribution, Star Distribution, Star Formation, Stellar Winds, Carbon Monoxide, Density Distribution, Gas Density, Interstellar Extinction, Plasma Interactions
Scientific paper
Near-infrared images of two star-forming regins, AFGL 2591 and S140, reveal nearly circular loops with the young stellar object at one edge. The loops are aligned with the direction of high-velocity outflow and are interpreted as the outline of a bubble or cavity of dimensions about 10,000 AU in the dense molecular cloud material. In both cases, the bubble appears on only one side of the young stellar object. For AFGL 2591, it corresponds to the blueshifted CO lobe, while for S140 IRS 1 it corresponds to the redshifted CO lobe. In 1982, Koenigl predicted this shape and geometry bubble for a stellar wind impinging on a molecular cloud with density gradient of roughly 1/z-squared. A similar density gradient is implied by reddening measurements of the bubble in AFGL 2591. These images show directly the interaction of the stellar wind from a newly forming star with its environment on about 1000 AU (arcsec) scales.
Forrest William John
Shure Mark A.
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