2004A&A...417..981H

Query : 2004A&A...417..981H

2004A&A...417..981H - Astronomy and Astrophysics, volume 417, 981-985 (2004/4-3)

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

HOFMANN K.-H., BALEGA Y.Y., PREIBISCH T. and WEIGELT G.

Abstract (from CDS):

We present K'-band bispectrum speckle interferometry of the ultracompact H II region K3-50A. Our image resolves the central 1''x1'' 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. (2003ApJ...584..368O), 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.

Abstract Copyright: ∼

Journal keyword(s): techniques: interferometric - stars: formation - stars: pre-main sequence - H II regions: individual: G70.293+1.600

Simbad objects: 8

Full paper

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Number of rows : 8

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Sp type	#ref 1850 - 2023	#notes
1	NAME K 3-50A	HII	20 01 45.6	+33 32 42	~	79	0
2	OKYM K3-50A2	IR	20 01 45.62	+33 32 43.1	~	3	0
3	OKYM K3-50A3	*	20 01 45.62	+33 32 43.5	~	4	0
4	OKYM K3-50A1	IR	20 01 45.66	+33 32 43.0	~	3	0
5	OKYM K3-50A4	IR	20 01 45.74	+33 32 42.2	~	4	0
6	[KC97c] G070.3+01.6	HII	20 01 46.8	+33 33 05	~	9	0
7	NGC 6857	HII	20 01 47.75	+33 31 38.2	~	87	3
8	STHO K3-50A 1	IR	~	~	~	3	0

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