JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region
Outflows and winds launched from young stars play a crucial role in the evolution of protostars and the early stages of planet formation. However, the specific details of the mechanism behind these phenomena, including how they affect the protoplanetary disk structure, are still debated. We present...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/acdfca |
| _version_ | 1827828595704201216 |
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| author | D. Harsono P. Bjerkeli J. P. Ramsey K. M. Pontoppidan L. E. Kristensen J. K. Jørgensen H. Calcutt Z-Y. Li A. Plunkett |
| author_facet | D. Harsono P. Bjerkeli J. P. Ramsey K. M. Pontoppidan L. E. Kristensen J. K. Jørgensen H. Calcutt Z-Y. Li A. Plunkett |
| author_sort | D. Harsono |
| collection | DOAJ |
| description | Outflows and winds launched from young stars play a crucial role in the evolution of protostars and the early stages of planet formation. However, the specific details of the mechanism behind these phenomena, including how they affect the protoplanetary disk structure, are still debated. We present JWST NIRSpec integral field unit observations of atomic and H _2 lines from 1 to 5.1 μ m toward the low-mass protostar TMC1A. For the first time, a collimated atomic jet is detected from TMC1A in the [Fe ii ] line at 1.644 μ m along with corresponding extended H _2 2.12 μ m emission. Toward the protostar, we detected spectrally broad H i and He i emissions with velocities up to 300 km s ^−1 that can be explained by a combination of protostellar accretion and a wide-angle wind. The 2 μ m continuum dust emission, H i , He i , and O i all show emission from the illuminated outflow cavity wall and scattered line emission. These observations demonstrate the potential of JWST to characterize and reveal new information about the hot inner regions of nearby protostars; in this case, a previously undetected atomic wind and ionized jet in a well-known outflow. |
| first_indexed | 2024-03-12T03:52:05Z |
| format | Article |
| id | doaj.art-fb755282440d4e0684b1f5942172d240 |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-12T03:52:05Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj.art-fb755282440d4e0684b1f5942172d2402023-09-03T12:20:26ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019512L3210.3847/2041-8213/acdfcaJWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock RegionD. Harsono0https://orcid.org/0000-0001-6307-4195P. Bjerkeli1https://orcid.org/0000-0002-7993-4118J. P. Ramsey2https://orcid.org/0000-0002-3835-3990K. M. Pontoppidan3https://orcid.org/0000-0001-7552-1562L. E. Kristensen4https://orcid.org/0000-0003-1159-3721J. K. Jørgensen5https://orcid.org/0000-0001-9133-8047H. Calcutt6https://orcid.org/0000-0003-3393-294XZ-Y. Li7https://orcid.org/0000-0002-7402-6487A. Plunkett8https://orcid.org/0000-0002-9912-5705Institute of Astronomy, Department of Physics, National Tsing Hua University , Hsinchu, Taiwan ; dharsono@gapp.nthu.edu.twChalmers University of Technology , Department of Space, Earth and Environment, SE-412 96 Gothenburg, SwedenDepartment of Astronomy, University of Virginia , Charlottesville, VA 22904, USASpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USANiels Bohr Institute, University of Copenhagen , Øster Voldgade 5–7, DK-1350 Copenhagen K., DenmarkNiels Bohr Institute, University of Copenhagen , Øster Voldgade 5–7, DK-1350 Copenhagen K., DenmarkInstitute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń , ul. Grudzikadzka 5, 87–100 Toruń, PolandDepartment of Astronomy, University of Virginia , Charlottesville, VA 22904, USANational Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903, USAOutflows and winds launched from young stars play a crucial role in the evolution of protostars and the early stages of planet formation. However, the specific details of the mechanism behind these phenomena, including how they affect the protoplanetary disk structure, are still debated. We present JWST NIRSpec integral field unit observations of atomic and H _2 lines from 1 to 5.1 μ m toward the low-mass protostar TMC1A. For the first time, a collimated atomic jet is detected from TMC1A in the [Fe ii ] line at 1.644 μ m along with corresponding extended H _2 2.12 μ m emission. Toward the protostar, we detected spectrally broad H i and He i emissions with velocities up to 300 km s ^−1 that can be explained by a combination of protostellar accretion and a wide-angle wind. The 2 μ m continuum dust emission, H i , He i , and O i all show emission from the illuminated outflow cavity wall and scattered line emission. These observations demonstrate the potential of JWST to characterize and reveal new information about the hot inner regions of nearby protostars; in this case, a previously undetected atomic wind and ionized jet in a well-known outflow.https://doi.org/10.3847/2041-8213/acdfcaJetsH I line emissionYoung stellar objectsProtostars |
| spellingShingle | D. Harsono P. Bjerkeli J. P. Ramsey K. M. Pontoppidan L. E. Kristensen J. K. Jørgensen H. Calcutt Z-Y. Li A. Plunkett JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region The Astrophysical Journal Letters Jets H I line emission Young stellar objects Protostars |
| title | JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region |
| title_full | JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region |
| title_fullStr | JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region |
| title_full_unstemmed | JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region |
| title_short | JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region |
| title_sort | jwst peers into the class i protostar tmc1a atomic jet and spatially resolved dissociative shock region |
| topic | Jets H I line emission Young stellar objects Protostars |
| url | https://doi.org/10.3847/2041-8213/acdfca |
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