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Magnetically-regulated fragmentation of a massive, dense and turbulent clump

Fontani, F and Commerçon, B and Giannetti, A and Beltrán, MT and Sánchez-Monge, Á and Testi, L and Brand, J and Caselli, P and Cesaroni, R and Dodson, R and Longmore, SN and Rioja, M and Tan, JC and Walmsley, CM (2016) Magnetically-regulated fragmentation of a massive, dense and turbulent clump. Astronomy and Astrophysics, 593 (L14). ISSN 0004-6361

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Abstract

Massive stars, multiple stellar systems and clusters are born from the gravitational collapse of massive dense gaseous clumps, and the way these systems form strongly depends on how the parent clump fragments into cores during collapse. Numerical simulations show that magnetic fields may be the key ingredient in regulating fragmentation. Here we present ALMA observations at ~0.25'' resolution of the thermal dust continuum emission at ~278 GHz towards a turbulent, dense, and massive clump, IRAS 16061-5048c1, in a very early evolutionary stage. The ALMA image shows that the clump has fragmented into many cores along a filamentary structure. We find that the number, the total mass and the spatial distribution of the fragments are consistent with fragmentation dominated by a strong magnetic field. Our observations support the theoretical prediction that the magnetic field plays a dominant role in the fragmentation process of massive turbulent clump.

Item Type: Article
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA; astro-ph.SR
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: EDP Sciences
Related URLs:
Date Deposited: 01 Sep 2016 10:34
Last Modified: 07 Nov 2016 16:09
URI: http://researchonline.ljmu.ac.uk/id/eprint/4080

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