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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 421568.0, MPI für Astronomie / Publikationen_mpia
Dissecting massive YSOs with mid-infrared interferometry
Authors:Linz, H.; Henning, Th; Stecklum, B.; Men'shchikov, A.; van Boekel, R.; Follert, R.; Feldt, M.
Place of Publication:San Francisco
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:Massive Star Formation: Observations Confront Theory
Start Page:132
End Page:139
Title of Series:ASP Conf. Ser.
Volume (in Series):387
Name of Conference/Meeting:Astronomical Society of the Pacific Conference Series
Place of Conference/Meeting:Heidelberg
Review Status:not specified
Audience:Not Specified
Abstract / Description:The very inner structure of massive YSOs is difficult to trace. With conventional observational methods we often identify structures still several hundreds of AU in size. But we also need information about the innermost regions where the actual mass transfer onto the forming high-mass star occurs. An innovative way to probe these scales is to utilise mid-infrared interferometry. Here, we present first results of our MIDI GTO programme at the VLTI. We observed 10 well-known massive YSOs down to scales of 20 mas. We clearly resolve these objects which results in low visibilities and sizes in the order of 30 -- 50~mas. Thus, with MIDI we can for the first time quantify the extent of the thermal emission from the warm circumstellar dust and thus calibrate existing concepts regarding the compactness of such emission in the pre-UCH II region phase. Special emphasis will be given to the BN-type object M8E-IR where our modelling is most advanced and where there is indirect evidence for a strongly bloated central star.
Comment of the Author/Creator:Date: 2008, May 1, 2008
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISBN:978-1-58381-642-4 [ID No:1]
URL:http://adsabs.harvard.edu/abs/2008ASPC..387..132L [ID No:2]
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