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| Paper: |
On the Formation of Massive Stars |
| Volume: |
465, Four Decades of Massive Star Research - A Scientific Meeting in Honor of Anthony J. Moffat |
| Page: |
446 |
| Authors: |
Kaper, L.; Ellerbroek, L.; Ochsendorf, B.; Bik, A. |
| Abstract: |
The birth process and (early) evolution of massive stars is still
poorly understood. Heavy extinction hides their birthplaces from
view and the short formation timescale limits the sample of objects
to be studied. So far, our physical knowledge of massive YSOs has
been derived from near-IR imaging and spectroscopy, revealing
populations of young OB-type stars, some still surrounded by a
disk, others apparently ‘normal’ main sequence
stars powering H II regions. The most important spectral
features of OB-type stars are, however, located in the UV and
optical range. With the new optical/near-infrared spectrograph
X-shooter on the ESO Very Large Telescope it is
possible to extend the spectral coverage of these massive YSOs into
the optical range. Our first results are very promising: the
discovery of a jet demonstrates that one of our mYSOs is still
actively accreting. Furthermore, the first firm spectral classification of
another mYSO results in the precise location on a pre-main-sequence
track. |
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