Young massive stars and their environment in the mid-infrared at high angular resolution
arXiv:0807.4121 · doi:10.1088/1742-6596/131/1/012022
Abstract
We present interferometric and single-dish mid-infrared observations of a sample of massive young stellar objects (BN-type objects), using VLTI-MIDI (10 micron) and Subaru-COMICS (24.5 micron). We discuss the regions S140, Mon R2, M8E-IR, and W33A. The observations probe the inner regions of the dusty envelope at scales of 50 milli arcsecond and 0.6 arcsec (100-1000 AU), respectively. Simultaneous model fits to spectral energy distributions and spatial data are achieved using self-consistent spherical envelope modelling. We conclude that those MYSO envelopes that are best described by a spherical geometry, the commensurate density distribution is a powerlaw with index -1.0. Such a powerlaw is predicted if the envelope is supported by turbulence on the 100-1000AU scales probed with MIDI and COMICS, but the role of rotation at these spatial scales need testing.
Contribution to conference "The Universe under the Microscope - Astrophysics at High Angular Resolution", Cologne April 2008, eds. R. Schoedel, A. Eckart, S. Pfalzner, and E. Ros
References in corpus (10)
- Theory of Star Formation
- Toward Understanding Massive Star Formation
- Slow Star Formation in Dense Gas: Evidence and Implications
- The mass function of dense molecular cores and the origin of the IMF
- The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X
- Radiation Feedback and Fragmentation in Massive Protostellar Cores
- An equatorial wind from the massive young stellar object S140 IRS 1
- VLTI/MIDI 10 micron interferometry of the forming massive star W33A
- The Complex Mid-Infrared Structure at the Heart of IRAS 20126+4104
- Disks around massive young stellar objects: are they common?