Zooming in to Massive Star Birth
Artikel i vetenskaplig tidskrift, 2018

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 N2D +(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 (∼50M⊙), 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-Alfvenic turbulent core model. However, virial equilibrium could be achieved with sub-Alfvenic conditions involving magnetic field strengths of ∼2 mG.

ISM: kinematics and dynamics

stars: formation

ISM: magnetic fields

stars: massive

stars: protostars

ISM: jets and outflows

Författare

Shuo Kong

Yale University

Jonathan Tan

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

University of Virginia

P. Caselli

Max Planck-institutet

Francesco Fontani

Osservatorio Astrofisico di Arcetri

Ke Wang

European Southern Observatory (ESO)

Michael J. Butler

Max Planck-institutet

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 867 2 94

Ämneskategorier

Meteorologi och atmosfärforskning

Astronomi, astrofysik och kosmologi

Atom- och molekylfysik och optik

DOI

10.3847/1538-4357/aae1b2

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Senast uppdaterat

2019-05-07