Unveiling the role of magnetic fields in a filament accreting onto a young protocluster

Tabatabaei, Farideh S., Redaelli, Elena, Galli, Daniele, Caselli, Paola, Franco, Gabriel A. P., Duarte-Cabral, Ana ORCID: https://orcid.org/0000-0002-5259-4774 and Padovani, Marco 2024. Unveiling the role of magnetic fields in a filament accreting onto a young protocluster. Astronomy & Astrophysics 688 , A98. 10.1051/0004-6361/202449859

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Abstract

Context. To develop a more comprehensive picture of star formation, it is essential to understand the physical relationship between dense cores and the filaments embedding them. There is evidence that magnetic fields play a crucial role in this context. Aims. We aim to understand how magnetic fields influence the properties and kinematics of an isolated filament located east of the Barnard 59 clump, within the Pipe Nebula. Methods. We used near-infrared polarization observations to determine the magnetic field configuration, and we applied the Davis–Chandrasekhar–Fermi method to infer the magnetic field strength in the plane of the sky. Furthermore, we used complementary data from the James Clerk Maxwell Submillimetre Telescope of C18O and the 13CO J = 3–2 transition to determine the filament’s kinematics. Finally, we modeled the radial density profile of the filament with polytropic cylindrical models. Results. Our results indicate that the filament is stable to radial collapse and is radially supported by agents other than thermal pressure. In addition, based on previous observations of emission lines on this source, we suggest that gas is flowing toward the hub, while C18O (3–2) nonthermal motions indicate that the cloud is in a quiescent state.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	EDP Sciences
ISSN:	0004-6361
Date of First Compliant Deposit:	11 September 2024
Date of Acceptance:	22 June 2024
Last Modified:	12 Sep 2024 10:30
URI:	https://orca.cardiff.ac.uk/id/eprint/172034

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