Observations of spiral and streamer on a candidate proto-brown dwarf
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- B Riaz
- Universitäts-Sternwarte München, Ludwig Maximilians Universität , Scheinerstraβe 1, D-81679 München , Germany
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- D Stamatellos
- Jeremiah Horrocks Institute for Mathematics, Physics & Astronomy, University of Central Lancashire , Preston PR1 2HE , UK
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- M N Machida
- Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University , Fukuoka , Japan
説明
<jats:title>ABSTRACT</jats:title> <jats:p>Spirals and streamers are the hallmarks of mass accretion during the early stages of star formation. We present the first observations of a large-scale spiral and a streamer towards a very young brown dwarf candidate in its early formation stages. These observations show, for the first time, the influence of external environment that results in asymmetric mass accretion via feeding filaments on to a candidate proto-brown dwarf in the making. The impact of the streamer has produced emission in warm carbon-chain species close to the candidate proto-brown dwarf. Two contrasting scenarios, a pseudo-disc twisted by core rotation and the collision of dense cores, can both explain these structures. The former argues for the presence of a strong magnetic field in brown dwarf formation while the latter suggests that a minimal magnetic field allows large-scale spirals and clumps to form far from the candidate proto-brown dwarf.</jats:p>
収録刊行物
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- Monthly Notices of the Royal Astronomical Society
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Monthly Notices of the Royal Astronomical Society 529 (4), 3601-3609, 2024-03-11
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360584340539911680
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- ISSN
- 13652966
- 00358711
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