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http://hdl.handle.net/20.500.12386/32750
Titolo: | Resolving the Collimation Zone of an Intermediate-mass Protostellar Jet | Autori: | Rodríguez-Kamenetzky, Adriana R. Carrasco-González, Carlos Rodríguez, Luis F. Ray, Tom P. SANNA, ALBERTO MOSCADELLI, Luca Hoare, Melvin Galván-Madrid, Roberto Shang, Hsien Lizano, Susana Eislöffel, Jochen Lim, Jeremy Torrelles, José M. Ho, Paul Feeney-Johansson, Anton |
Data pubblicazione: | 2022 | Rivista: | THE ASTROPHYSICAL JOURNAL LETTERS | Numero: | 931 | Fascicolo: | 2 | Da pagina:: | L26 | Abstract: | We report new VLA and e-MERLIN high-resolution and -sensitivity images of the triple radio continuum source in the Serpens star-forming region. These observations allowed us to perform a deep multifrequency, multiepoch study by exploring the innermost regions (≲100 au) of an intermediate-mass young stellar object for the first time, with a physical resolution of ~15 au. The kinematic analysis of knots recently ejected by the protostar indicates that the jet is undergoing episodic variations in velocity. In addition, our multifrequency images reveal striking characteristics, e.g., a highly collimated ionized stream that would be launched at a radial distance of ~0.4 au from the protostar and a narrow (~28 au wide) ionized cavity that would be excited by the interaction of a wide-angle component with the surrounding toroid of infalling material. In light of these results, we propose the scenario in which both a highly collimated jet and a wide-angle wind coexist as the most plausible to explain our observations, either launched by the X-wind or X-plus-disk-wind mechanism. | URI: | http://hdl.handle.net/20.500.12386/32750 | URL: | https://iopscience.iop.org/article/10.3847/2041-8213/ac6fd1 https://api.elsevier.com/content/abstract/scopus_id/85131420225 |
ISSN: | 2041-8205 | DOI: | 10.3847/2041-8213/ac6fd1 | Bibcode ADS: | 2022ApJ...931L..26R | Fulltext: | open |
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