Probing Jets from Young Embedded Sources: Clues from HST Near-IR [Fe ii] Images

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dc.citation.articleNumber23en_US
dc.citation.issueNumber1en_US
dc.citation.journalTitleThe Astrophysical Journalen_US
dc.citation.volumeNumber919en_US
dc.contributor.authorErkal, Jessicaen_US
dc.contributor.authorNisini, Brunellaen_US
dc.contributor.authorCoffey, Deirdreen_US
dc.contributor.authorBacciotti, Francescaen_US
dc.contributor.authorHartigan, Patricken_US
dc.contributor.authorAntoniucci, Simoneen_US
dc.contributor.authorGiannini, Teresaen_US
dc.contributor.authorEislöffel, Jochenen_US
dc.contributor.authorManara, Carlo Feliceen_US
dc.date.accessioned2021-10-11T16:08:47Zen_US
dc.date.available2021-10-11T16:08:47Zen_US
dc.date.issued2021en_US
dc.description.abstractWe present near-infrared [Fe ii] images of four Class 0/I jets (HH 1/2, HH 34, HH 111, HH 46/47) observed with the Hubble Space Telescope (HST) Wide Field Camera 3. The unprecedented angular resolution allows us to measure proper motions, jet widths and trajectories, and extinction along the jets. In all cases, we detect the counterjet, which was barely visible or invisible at shorter wavelengths. We measure tangential velocities of a few hundred kilometers per second, consistent with previous HST measurements over 10 years ago. We measure the jet width as close as a few tens of au from the star, revealing high collimations of about 2° for HH 1, HH 34, and HH 111 and about 8° for HH 46, all of which are preserved up to large distances. For HH 34, we find evidence of a larger initial opening angle of about 7°. Measurement of knot positions reveals deviations in trajectory of both the jet and counterjet of all sources. Analysis of asymmetries in the inner knot positions for HH 111 suggests the presence of a low mass stellar companion at separation 20–30 au. Finally, we find extinction values of 15–20 mag near the source, which gradually decrease moving downstream along the jet. These observations have allowed us to study the counterjet at unprecedentedly high angular resolution and will be a valuable reference for planning future JWST mid-infrared observations that will peer even closer into the jet engine.en_US
dc.identifier.citationErkal, Jessica, Nisini, Brunella, Coffey, Deirdre, et al.. "Probing Jets from Young Embedded Sources: Clues from HST Near-IR [Fe ii] Images." <i>The Astrophysical Journal,</i> 919, no. 1 (2021) IOP Publishing: https://doi.org/10.3847/1538-4357/ac06c5.en_US
dc.identifier.doihttps://doi.org/10.3847/1538-4357/ac06c5en_US
dc.identifier.urihttps://hdl.handle.net/1911/111540en_US
dc.language.isoengen_US
dc.publisherIOP Publishingen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by IOP Publishing.en_US
dc.titleProbing Jets from Young Embedded Sources: Clues from HST Near-IR [Fe ii] Imagesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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