Zooming in to Massive Star Birth

We present high-resolution (0 2, 1000 au) 1.3 mm ALMA observations of the massive infrared dark cloud clump, G028.37+00.07-C1, thought to harbor the early stages of massive star formation. Using (3-2), we resolve the previously identified C1-S core, separating the bulk of its emission from two nearb...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 867; no. 2; pp. 94 - 112
Main Authors Kong, Shuo, Tan, Jonathan C., Caselli, Paola, Fontani, Francesco, Wang, Ke, Butler, Michael J.
Format Journal Article
LanguageEnglish
Published Philadelphia The American Astronomical Society 10.11.2018
IOP Publishing
Subjects
Astrophysics
Deuteration
Gamma rays
ISM: jets and outflows
ISM: kinematics and dynamics
ISM: magnetic fields
Magnetic fields
Massive stars
Microprocessors
Protostars
Star & galaxy formation
Star formation
Stars & galaxies
stars: formation
stars: massive
stars: protostars
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Summary:We present high-resolution (0 2, 1000 au) 1.3 mm ALMA observations of the massive infrared dark cloud clump, G028.37+00.07-C1, thought to harbor the early stages of massive star formation. Using (3-2), we resolve the previously identified C1-S core, separating the bulk of its emission from two nearby protostellar sources. C1-S is thus identified as a massive (∼50 M ), compact (∼0.1 pc diameter) starless core, e.g., with no signs of outflow activity. Being highly deuterated, this is a promising candidate for a pre-stellar core on the verge of collapse. An analysis of its dynamical state indicates a sub-virial velocity dispersion compared to a trans-Alfvénic turbulent core model. However, virial equilibrium could be achieved with sub-Alfvénic conditions involving magnetic field strengths of ∼2 mG.
Bibliography:AAS04223
Interstellar Matter and the Local Universe
ISSN:0004-637X
1538-4357
1538-4357
DOI:10.3847/1538-4357/aae1b2