PROJECT-J: JWST Observations of HH46 IRS and Its Outflow. Overview and First Results

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dc.citation.articleNumber168en_US
dc.citation.issueNumber2en_US
dc.citation.journalTitleThe Astrophysical Journalen_US
dc.citation.volumeNumber967en_US
dc.contributor.authorNisini, Brunellaen_US
dc.contributor.authorNavarro, Maria Gabrielaen_US
dc.contributor.authorGiannini, Teresaen_US
dc.contributor.authorAntoniucci, Simoneen_US
dc.contributor.authorPatrick, J. Kavanaghen_US
dc.contributor.authorHartigan, Patricken_US
dc.contributor.authorBacciotti, Francescaen_US
dc.contributor.authorGaratti, Alessio Caratti oen_US
dc.contributor.authorNoriega-Crespo, Albertoen_US
dc.contributor.authorDishoeck, Ewine F. vanen_US
dc.contributor.authorWhelan, Emma T.en_US
dc.contributor.authorArce, Hector G.en_US
dc.contributor.authorCabrit, Sylvieen_US
dc.contributor.authorCoffey, Deirdreen_US
dc.contributor.authorFedele, Davideen_US
dc.contributor.authorEislöffel, Jochenen_US
dc.contributor.authorPalumbo, Maria Elisabettaen_US
dc.contributor.authorPodio, Lindaen_US
dc.contributor.authorRay, Tom P.en_US
dc.contributor.authorSchultze, Meganen_US
dc.contributor.authorUrso, Riccardo G.en_US
dc.contributor.authorAlcalá, Juan M.en_US
dc.contributor.authorBautista, Manuel A.en_US
dc.contributor.authorCodella, Claudioen_US
dc.contributor.authorGreene, Thomas P.en_US
dc.contributor.authorManara, Carlo F.en_US
dc.date.accessioned2024-08-29T21:11:44Zen_US
dc.date.available2024-08-29T21:11:44Zen_US
dc.date.issued2024en_US
dc.description.abstractWe present the first results of the JWST program PROJECT-J (PROtostellar JEts Cradle Tested with JWST), designed to study the Class I source HH46 IRS and its outflow through NIRSpec and MIRI spectroscopy (1.66–28 μm). The data provide line images (∼6.″6 in length with NIRSpec, and up to ∼20″ with MIRI) revealing unprecedented details within the jet, the molecular outflow, and the cavity. We detect, for the first time, the redshifted jet within ∼90 au from the source. Dozens of shock-excited forbidden lines are observed, including highly ionized species such as [Ne iii] 15.5 μm, suggesting that the gas is excited by high velocity (>80 km s−1) shocks in a relatively high-density medium. Images of H2 lines at different excitations outline a complex molecular flow, where a bright cavity, molecular shells, and a jet-driven bow shock interact with and are shaped by the ambient conditions. Additional NIRCam 2 μm images resolve the HH46 IRS ∼110 au binary system and suggest that the large asymmetries observed between the jet and the H2 wide-angle emission could be due to two separate outflows being driven by the two sources. The spectra of the unresolved binary show deep ice bands and plenty of gaseous lines in absorption, likely originating in a cold envelope or disk. In conclusion, JWST has unraveled for the first time the origin of the HH46 IRS complex outflow demonstrating its capability to investigate embedded regions around young stars, which remain elusive even at near-IR wavelengths.en_US
dc.identifier.citationNisini, B., Navarro, M. G., Giannini, T., Antoniucci, S., Patrick, J. K., Hartigan, P., Bacciotti, F., Garatti, A. C. o, Noriega-Crespo, A., Dishoeck, E. F. van, Whelan, E. T., Arce, H. G., Cabrit, S., Coffey, D., Fedele, D., Eislöffel, J., Palumbo, M. E., Podio, L., Ray, T. P., … Manara, C. F. (2024). PROJECT-J: JWST Observations of HH46 IRS and Its Outflow. Overview and First Results. The Astrophysical Journal, 967(2), 168. https://doi.org/10.3847/1538-4357/ad3d5aen_US
dc.identifier.digitalNisini_2024_ApJ_967_168en_US
dc.identifier.doihttps://doi.org/10.3847/1538-4357/ad3d5aen_US
dc.identifier.urihttps://hdl.handle.net/1911/117719en_US
dc.language.isoengen_US
dc.publisherIOP Publishingen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titlePROJECT-J: JWST Observations of HH46 IRS and Its Outflow. Overview and First Resultsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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