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The Asymmetric Bipolar Fe II Jet and H2 Outflow of TMC1A Resolved with JWST's NIRSpec IFU by Assani, Korash; Harsono, Daniel; Ramsey, Jon; Li, Zhi-Yun; Bjerkeli, Per; Pontoppidan, Klaus; Tychoniec, Łukasz; Calcutt, Hannah; Kristensen, Lars; Jorgensen, Jes; Plunkett, Adele; van Gelder, Martijn; Francis, Logan is a scholarly article available to read on EtoBox.

What is The Asymmetric Bipolar Fe II Jet and H2 Outflow of TMC1A Resolved with JWST's NIRSpec IFU about?

(abridged) Protostellar outflows exhibit large variations in their structure depending on the observed gas emission. This study analyzes the atomic jet and molecular outflow in the Class I protostar, TMC1A to characterize morphology and identify previously undetected spatial features with JWST's NIRSpec IFU. In addition to identifying a large number of Fe II and H2 lines, we have detected the bipolar Fe jet by revealing, for the first time, the presence of a red-shifted atomic jet. Similarly, the red-shifted component of the H2 slower wide-angle outflow is observed. Both Fe II and H2 red-shifted emission exhibit significantly lower flux densities compared to their blue-shifted counterparts. Additionally, we report the detection of a collimated high-velocity (100 km s-1), blue-shifted H2 outflow, suggesting the presence of a molecular jet in addition to the well-known wider angle low-velocity structure. The Fe II and H2 jets show multiple intensity peaks along the jet axis, which may be associated with ongoing or recent outburst events. In addition to the variation in their intensities, the H2 wide-angle outflow exhibits a "ring"-like structure. The blue-shifted H2 outflow also show

Author

Assani, Korash; Harsono, Daniel; Ramsey, Jon; Li, Zhi-Yun; Bjerkeli, Per; Pontoppidan, Klaus; Tychoniec, Łukasz; Calcutt, Hannah; Kristensen, Lars; Jorgensen, Jes; Plunkett, Adele; van Gelder, Martijn; Francis, Logan

Published

2024

Language

EN