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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 358638.0, MPI für Astronomie / Publikationen_mpia
The morphology of M17-UC1: a disk candidate surrounding a hypercompact H II region
Authors:Nielbock, M.; Chini, R.; Hoffmeister, V. H.; Scheyda, C. M.; Steinacker, J.; Nürnberger, D.; Siebenmorgen, R.
Date of Publication (YYYY-MM-DD):2007
Title of Journal:The Astrophysical Journal
Volume:656
Start Page:L81
End Page:L84
Audience:Not Specified
Abstract / Description:We investigate the morphology and the evolutionary stage of the hypercompact H II region M17-UC1 using observations at infrared wavelengths and NIR radiative transfer modeling. For the first time, this region is resolved into two emission areas separated by a dark lane reminiscent of an obscuring silhouette caused by a circumstellar disk. So far, the observational data as well as model calculations suggest that M17-UC1 is surrounded by a disk of cool dust. This direct detection of a circumstellar disk candidate around a hypercompact H II region is in agreement with the expectations of the disk accretion model for high-mass star formation. Based on observations made with ESO telescopes at the La Silla and Paranal observatories under programs 71.C-0185(A), 71.C-0353(A), 73.C-0170(A), 73.C-0407(A), 75.C-0418(A), and 77.C-0174(A).
Free Keywords:Stars: Circumstellar Matter; Galaxy: Open Clusters and Associations: General; Galaxy: Open Clusters and Associations: Individual: Messier Number: M17; Stars: Formation; Stars: Pre-Main-Sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2007ApJ...656L..81N
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