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JWST Observations o...
JWST Observations of Young protoStars (JOYS) Linked accretion and ejection in a Class I protobinary system
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- Tychoniec, Łukasz (author)
- Universiteit Leiden (UL),Leiden University (UL),European Southern Observatory (ESO)
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- Van Gelder, M. L. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- van Dishoeck, E. F. (author)
- Universiteit Leiden (UL),Leiden University (UL),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Francis, L. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Rocha, W. R.M. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Garatti, A. Caratti o. (author)
- Osservatorio Astronomico di Capodimonte
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- Beuther, H. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Gieser, C. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Justtanont, Kay, 1965 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Linnartz, H. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Le Gouellec, Valentin J. M. (author)
- NASA Ames Research Center
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- Perotti, G. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Devaraj, Rangaswamy (author)
- Dublin Institute for Advanced Studies
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- Tabone, Benoît (author)
- Institut d'Astrophysique Spatiale
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- Ray, Tom (author)
- Dublin Institute for Advanced Studies
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- Brunken, N. G.C. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Chen, Y. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Kavanagh, Patrick (author)
- Maynooth University
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- Klaassen, Pamela (author)
- Royal Observatory
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- Slavicinska, K. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Gudel, M. (author)
- Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universität Wien,University of Vienna
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Östlin, G. (author)
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 687
- Related links:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
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- Context. Accretion and ejection dictate the outcomes of star and planet formation processes. The mid-infrared (MIR) wavelength range offers key tracers of processes that have been difficult to detect and spatially resolve in protostars until now. Aims. We aim to characterize the interplay between accretion and ejection in the low-mass Class I protobinary system TMC1, comprising two young stellar objects: TMC1-W and TMC1-E at a 85 au separation. Methods. Using the James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI) observations in 5–28 µm range, we measured the intensities of emission lines of H2, atoms, and ions, for instance, the [Fe II] and [Ne II], and HI recombination lines. We analyzed the spatial distribution of the different species using the MIRI Medium Resolution Spectrometer (MRS) capabilities to spatially resolve emission at 0'.́2–0'.́7 scales. we compared these results with the corresponding Atacama Large Millimeter/submillimeter Array (ALMA) maps tracing cold gas and dust. Results. We detected H2 outflow coming from TMC1-E, with no significant H2 emission from TMC1-W. The H2 emission from TMC1-E outflow appears narrow and extends to wider opening angles with decreasing Eup from S(8) to S(1) rotational transitions, indicating the disk wind as its origin. The outflow from TMC1-E protostar shows spatially extended emission lines of [Ne II], [Ne III], [Ar II], and [Ar III], with their line ratios consistent with UV radiation as a source of ionization. With ALMA, we detected an accretion streamer infalling from >1000 au scales onto the TMC1-E component. The TMC1-W protostar powers a collimated jet, detected with [Fe II] and [Ni II], making it consistent with energetic flow. A much weaker ionized jet is observed from TMC1-E, and both jets appear strikingly parallel to each other, indicating that the disks are co-planar. TMC1-W is associated with strong emission from hydrogen recombination lines, tracing the accretion onto the young star. Conclusions. MIRI-MRS observations provide an unprecedented view of protostellar accretion and ejection processes on 20 au scales. Observations of a binary Class I protostellar system show that the two processes are clearly intertwined, with accretion from the envelope onto the disk influencing a wide-angle wind ejected on disk scales. Finally, the accretion from the protostellar disk onto the protostar is associated with the source launching a collimated high-velocity jet within the innermost regions of the disk.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- stars: low-mass
- stars: protostars
- ISM: jets and outflows
- techniques: spectroscopic
- accretion, accretion disks
- infrared: ISM
Publication and Content Type
- art (subject category)
- ref (subject category)
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Tychoniec, Łukas ...
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Van Gelder, M. L ...
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van Dishoeck, E. ...
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Francis, L.
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Rocha, W. R.M.
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Garatti, A. Cara ...
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show more...
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Beuther, H.
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Gieser, C.
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Justtanont, Kay, ...
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Linnartz, H.
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Le Gouellec, Val ...
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Perotti, G.
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Devaraj, Rangasw ...
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Tabone, Benoît
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Ray, Tom
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Brunken, N. G.C.
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Chen, Y.
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Kavanagh, Patric ...
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Klaassen, Pamela
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Slavicinska, K.
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Gudel, M.
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Östlin, G.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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Chalmers University of Technology