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OUTFLOW DETECTION IN A 70μm DARK HIGH-MASS CORE by Siyi Feng; Henrik Beuther; Qizhou Zhang; Hauyu Baobab Liu; Zhiyu Zhang; Ke Wang; Keping Qiu is a Physics and Astronomy article available to read on EtoBox.

What is OUTFLOW DETECTION IN A 70μm DARK HIGH-MASS CORE about?

We present observations toward a high-mass ), low-luminosity (  < L 10 ) m 70 m dark molecular core G28.34 S-A at 3.4 mm, using the IRAM 30 m telescope and the NOEMA interferometer. We report the detection of SiO =  J 2 1line emission, which is spatially resolved in this source at a linear resolution of ∼0.1 pc, while the 3.4 mm continuum image does not resolve any internal sub-structures. The SiO emission exhibits two W-E oriented lobes centering on the continuum peak. Corresponding to the redshifted and blueshifted gas with velocities up to -40 km s 1 relative to the quiescent cloud, these lobes clearly indicate the presence of a strong bipolar outflow from this m 70 m dark core, a source previously considered as one of the best candidates of "starless" core. Our SiO detection is consistent with ALMA archival data of SiO =  J 5 4, whose high-velocity blueshifted gas reveals a more compact lobe spatially closer to the dust center. This outflow indicates that the central source may be in an early evolutionary stage of forming a high-mass protostar. We also find that the lowvelocity components (in the range of -+ -Vlsr km s 5 3 1 ) have an extended, NW-SE oriented distribution. D

Who reads OUTFLOW DETECTION IN A 70μm DARK HIGH-MASS CORE?

Author

Siyi Feng; Henrik Beuther; Qizhou Zhang; Hauyu Baobab Liu; Zhiyu Zhang; Ke Wang; Keping Qiu

Publisher

University of Chicago Press; American Astronomical Society; Institute of Physics Publishing; IOP Publishing; Oxford University Press (OUP) (ISSN 0004-637X)

Published

2016

Language

EN

Field

Physics and Astronomy (Physical Sciences)