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Author Linz, H. ♦ Stecklum, B. ♦ Follert, R. ♦ Henning, Th ♦ van Boekel, R. ♦ Men'shchikov, A. ♦ Pascucci, I. ♦ Feldt, M.
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-09-08
Language English ♦ German
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics
Subject Keyword Astrophysics ♦ physics:astro-ph
Abstract The very inner structure of massive young stellar objects (YSOs) is difficult to trace. With conventional observational methods we identify structures still several hundreds of AU in size. However, the (proto-)stellar growth takes place at the innermost regions (<100 AU) where the actual mass transfer onto the forming high-mass star occurs. We present results from our programme toward massive YSOs at the VLTI, utilising the two-element interferometer MIDI. To date, we observed 10 well-known massive YSOs down to scales of 20 mas (typically corresponding to 20 - 40 AU for our targets) in the 8-13 micron region. We clearly resolve these objects which results in low visibilities and sizes in the order of 30-50 mas. For two objects, we show results of our modelling. We demonstrate that the MIDI data can reveal decisive structure information for massive YSOs. They are often pivotal in order to resolve ambiguities still immanent in model parameters derived from sole SED fitting.
Description Reference: J.Phys.Conf.Ser.131:012024,2008
Educational Use Research
Learning Resource Type Article
Page Count 6


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