Universität zu Köln

Fontani, F., Commercon, B., Giannetti, A., Beltran, M. T., Sanchez-Monge, A., Testi, L., Brand, J., Caselli, P., Cesaroni, R., Dodson, R., Longmore, S., Rioja, M., Tan, J. C. and Walmsley, C. M. (2016). Magnetically regulated fragmentation of a massive, dense, and turbulent clump. Astron. Astrophys., 593. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

Massive stars, multiple stellar systems, and clusters are born of 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 similar to 0.25 '' resolution of the thermal dust continuum emission at similar to 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 clumps.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Fontani, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Commercon, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Giannetti, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Beltran, M. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sanchez-Monge, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Testi, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brand, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Caselli, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cesaroni, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dodson, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Longmore, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rioja, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tan, J. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Walmsley, C. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-265334
DOI:	10.1051/0004-6361/201629442
Journal or Publication Title:	Astron. Astrophys.
Volume:	593
Date:	2016
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	1432-0746
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INFRARED DARK CLOUDS; ADAPTIVE MESH REFINEMENT; PROTOSTELLAR CANDIDATES; SOUTHERN-HEMISPHERE; DUST CONTINUUM; STAR-FORMATION; CO DEPLETION; CORES; EMISSION; MAGNETOHYDRODYNAMICS Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26533