Volume 540, April 2012
|Number of page(s)||4|
|Published online||06 April 2012|
Outflow and accretion detections in the young stellar object IRAS 04579+4703
1 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, PR China
2 Graduate University of the Chinese Academy of Sciences, 100080 Beijing, PR China
3 I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
Received: 16 December 2011
Accepted: 16 March 2012
We present Submillimeter Array observations of the young stellar object IRAS 04579+4703 in the 1.3 mm continuum and in the 12CO(2−1), 13CO(2−1), and C18O(2−1) lines. The 1.3 mm continuum image reveals a flattened structure with a mass of 13 M⊙. The 12CO(2−1) line map and position-velocity diagram, together with the broad wing (full width = 30 km s-1) of the 12CO(2−1) line, clearly show that there is an outflow motion, which originates from an embedded massive YSO in this region. The lengths of the blue-shifted and red-shifted lobes are 0.14 pc and 0.13 pc, respectively. The total gas mass, average dynamical timescale, and mass entrainment rate of the outflow are 1.8 M⊙, 1.7 × 104 yr and 1.1 × 10-4M⊙ yr-1, respectively. The flattened morphology of the continuum source perpendicular to the outflow direction, and the velocity gradient seen in the spectra of C18O(2−1) taken from different locations along the major axis of the continuum source, suggest that there is an accretion disk in this region.
Key words: ISM: individual objects: IRAS 04579+4703 / ISM: kinematics and dynamics / ISM: molecules / stars: formation
© ESO, 2012
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