EDP Sciences
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Volume 426, Number 2, November I 2004
Page(s) 523 - 534
Section Interstellar and circumstellar matter
DOI http://dx.doi.org/10.1051/0004-6361:20035880

A&A 426, 523-534 (2004)
DOI: 10.1051/0004-6361:20035880

The hot core-ultracompact H II connection in G10.47+0.03

I. Pascucci1, D. Apai1, Th. Henning1, B. Stecklum2 and B. Brandl3

1  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
    e-mail: pascucci@mpia.de
2  Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
3  Leiden Observatory, PO Box 9513, 2300 RA Leiden, The Netherlands

(Received 16 December 2003 / Accepted 30 June 2004)

We present infrared imaging and spectroscopic data of the complex massive star-forming region G10.47+0.03. The detection of seven mid-infrared (MIR) sources in our field combined with a sensitive Ks/ISAAC image allows to establish a very accurate astrometry, at the level of 0 $\farcs$3. Two MIR sources are found to be coincident with two ultracompact regions (s) within our astrometric accuracy. Another MIR source lies very close to three other regions and to the hot molecular core (HMC) in G10.47+0.03. Spectroscopy of two of the most interesting MIR sources allows to identify the location and spectral type of the ionizing sources. We discuss in detail the relationship between the HMC, the regions and the nearby MIR source. The nature of the other MIR sources is also investigated.

Key words: ISM: regions -- infrared: stars -- stars: individual: G10.47+0.03 -- stars: formation

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© ESO 2004