eprintid: 10192832 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/19/28/32 datestamp: 2024-06-17 11:29:04 lastmod: 2024-06-17 11:29:04 status_changed: 2024-06-17 11:29:04 type: book_section metadata_visibility: show sword_depositor: 699 creators_name: Pattle, Katherine creators_name: Fissel, Laura creators_name: Tahani, Mehrnoosh creators_name: Liu, Tie creators_name: Ntormousi, Evangelia title: Magnetic Fields in Star Formation: from Clouds to Cores ispublished: pub divisions: UCL divisions: B04 divisions: C06 divisions: F60 note: This version is the author submitted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: In this chapter we review recent advances in understanding the roles that magnetic fields play throughout the star formation process, gained through observations and simulations of molecular clouds, the dense, star-forming phase of the magnetized, turbulent interstellar medium (ISM). Recent results broadly support a picture in which the magnetic fields of molecular clouds transition from being gravitationally sub-critical and near equipartition with turbulence in low-density cloud envelopes, to being energetically sub-dominant in dense, gravitationally unstable star-forming cores. Magnetic fields appear to play an important role in the formation of cloud substructure by setting preferred directions for large-scale gas flows in molecular clouds, and can direct the accretion of material onto star-forming filaments and hubs. Low-mass star formation may proceed in environments close to magnetic criticality; high-mass star formation remains less well-understood, but may proceed in more supercritical environments. The interaction between magnetic fields and (proto)stellar feedback may be particularly important in setting star formation efficiency. We also review a range of widely-used techniques for quantifying the dynamic importance of magnetic fields, concluding that better-calibrated diagnostics are required in order to use the spectacular range of forthcoming observations and simulations to quantify our emerging understanding of how magnetic fields influence the outcome of the star formation process. date: 2023 date_type: published publisher: Astronomical Society of the Pacific official_url: https://www.aspbooks.org/a/volumes/article_details/?paper_id=40750 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2278976 isbn_13: 978-1-58381-955-5 lyricists_name: Pattle, Katherine lyricists_id: PATTL04 actors_name: Pattle, Katherine actors_id: PATTL04 actors_role: owner full_text_status: public series: Astronomical Society of the Pacific Conference Series volume: 9 place_of_pub: Kyoto, Japan pagerange: 193-232 book_title: Protostars and Planets VII: Proceedings of a Conference Held at Kyoto, Japan, 10-15 April 2023 editors_name: Inutsuka, Shu-ichiro editors_name: Aikawa, Yuri editors_name: Muto, Takayuki editors_name: Kengo, Tomida editors_name: Tamura, Motohide citation: Pattle, Katherine; Fissel, Laura; Tahani, Mehrnoosh; Liu, Tie; Ntormousi, Evangelia; (2023) Magnetic Fields in Star Formation: from Clouds to Cores. In: Inutsuka, Shu-ichiro and Aikawa, Yuri and Muto, Takayuki and Kengo, Tomida and Tamura, Motohide, (eds.) Protostars and Planets VII: Proceedings of a Conference Held at Kyoto, Japan, 10-15 April 2023. (pp. 193-232). Astronomical Society of the Pacific: Kyoto, Japan. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10192832/1/2203.11179v1.pdf