Universität zu Köln

Pillai, Thushara G. S., Clemens, Dan P., Reissl, Stefan, Myers, Philip C., Kauffmann, Jens ORCID: 0000-0002-5094-6393, Lopez-Rodriguez, Enrique, Alves, F. O., Franco, G. A. P., Henshaw, Jonathan ORCID: 0000-0001-9656-7682, Menten, Karl M., Nakamura, Fumitaka, Seifried, Daniel, Sugitani, Koji and Wiesemeyer, Helmut (2020). Magnetized filamentary gas flows feeding the young embedded cluster in Serpens South. Nat. Astron., 4 (12). S. 1195 - 1202. BERLIN: NATURE RESEARCH. ISSN 2397-3366

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Abstract

Far-infrared polarimetric observations reveal a transition parallel to the gas flow in the orientation of magnetic field lines in the Serpens South molecular cloud, allowing gravitational collapse to occur even in the presence of strong magnetic fields. Observations indicate that molecular clouds are strongly magnetized, and that magnetic fields influence the formation of stars. A key observation supporting the conclusion that molecular clouds are significantly magnetized is that the orientation of their internal structure is closely related to that of the magnetic field. At low column densities, the structure aligns parallel with the field, whereas at higher column densities, the gas structure is typically oriented perpendicular to magnetic fields, with a transition at visual extinctionsA(V) greater than or similar to 3 mag. Here we use far-infrared polarimetric observations from the HAWC+ polarimeter on SOFIA to report the discovery of a further transition in relative orientation, that is, a return to parallel alignment atA(V) greater than or similar to 21 mag in parts of the Serpens South cloud. This transition appears to be caused by gas flow and indicates that magnetic supercriticality sets in nearA(V) greater than or similar to 21 mag, allowing gravitational collapse and star cluster formation to occur even in the presence of relatively strong magnetic fields.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pillai, Thushara G. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Clemens, Dan P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reissl, Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED Myers, Philip C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kauffmann, Jens UNSPECIFIED orcid.org/0000-0002-5094-6393 UNSPECIFIED Lopez-Rodriguez, Enrique UNSPECIFIED UNSPECIFIED UNSPECIFIED Alves, F. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Franco, G. A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Henshaw, Jonathan UNSPECIFIED orcid.org/0000-0001-9656-7682 UNSPECIFIED Menten, Karl M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nakamura, Fumitaka UNSPECIFIED UNSPECIFIED UNSPECIFIED Seifried, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Sugitani, Koji UNSPECIFIED UNSPECIFIED UNSPECIFIED Wiesemeyer, Helmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-323179
DOI:	10.1038/s41550-020-1172-6
Journal or Publication Title:	Nat. Astron.
Volume:	4
Number:	12
Page Range:	S. 1195 - 1202
Date:	2020
Publisher:	NATURE RESEARCH
Place of Publication:	BERLIN
ISSN:	2397-3366
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CLOUDS; FIELDS Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32317