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| Paper: |
Integral-Field Spectroscopy of the Young High-Mass Star
IRAS 13481–6124 |
| Volume: |
464, Circumstellar Dynamics at High Resolution |
| Page: |
369 |
| Authors: |
Stecklum, B.; Caratti o Garatti, A.; Linz, H. |
| Abstract: |
We present results of AO-assisted K-band IFU spectroscopy of the massive
young star IRAS 13481–6124 performed with ESO's VLT/SINFONI instrument. Our
spectro-astrometric analysis of the Brγ line revealed a photo-center
shift with respect to the adjacent continuum of ∼1 AU at a distance of
3.1 kpc. The position angle of this shift matches with that of the outflow
which confirms that the massive star is indeed the driving
source. Furthermore, a velocity gradient along the major disk axis was found
which hints at the rotational sense of the ionized region, and thus of the
disk as well. The gradient is not consistent with Keplerian motion but points
to rigid rotation of the innermost disk.
Notably, emission of H2 is absent from source while both shocked and
fluorescent H2 emission are observed in its immediate surroundings. |
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