Peering into the heart of a high-mass star forming region: Bispectrum speckle interferometry of the ultracompact H II region K3-50 A

Details Peering into the heart of a high-mass star forming region: Bispectrum speckle interferometry of the ultracompact H II region K3-50 A Peering into the heart of a high-mass star forming region: Bispectrum speckle interferometry of the ultracompact H II region K3-50 A

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...417..981h&link_type=abstract

Astronomy and Astrophysics, v.417, p.981-985 (2004)

Astronomy and Astrophysics

Astrophysics

13

Techniques: Interferometric, Stars: Formation, Stars: Pre-Main Sequence, H Ii Regions: Individual: G70.293+1.600

Scientific paper

We present K'-band bispectrum speckle interferometry of the ultracompact H II region K3-50A. Our image resolves the central 1''× 1'' region into at least 7 point-like objects. We find K'-band counterparts for all but one of the N-band sources discovered by Okamoto et al. (\cite{Okamoto03}), and there are additional K'-band sources which were unresolved in the N-band images. Our reconstructed image also reveals the fine-structure of the cone-shaped nebulosity extending to the south. The brightest K'-band source is located exactly at the tip of the cone-shaped nebulosity. The nebula shows several arcs and the orientation of its main axis agrees very well with the direction of the CO outflow from K3-50A. This nebulosity therefore very likely represents the clumpy inner surface of a partially evacuated cavity excavated by the strong outflows.
Based on observations obtained at the Special Astrophysical Observatory with the 6 m telescope.

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