Emission-line Data Cubes of the HH 32 Stellar Jet

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dc.citation.articleNumber165en_US
dc.citation.issueNumber4en_US
dc.citation.journalTitleThe Astronomical Journalen_US
dc.citation.volumeNumber160en_US
dc.contributor.authorHartigan, Patricken_US
dc.contributor.authorHillenbrand, Lynne A.en_US
dc.contributor.authorMatuszewski, Matueszen_US
dc.contributor.authorBorges, Arlindo Chanen_US
dc.contributor.authorNeill, James D.en_US
dc.contributor.authorMartin, D. Christopheren_US
dc.contributor.authorMorrissey, Patricken_US
dc.contributor.authorMoore, Anna M.en_US
dc.date.accessioned2020-10-15T19:35:58Zen_US
dc.date.available2020-10-15T19:35:58Zen_US
dc.date.issued2020en_US
dc.description.abstractWe analyze data cubes of over 60 emission lines in the HH 32 stellar jet acquired with the Keck Cosmic Web Imager (KCWI). The data cover the less explored blue portion of the spectrum between 3586 and 6351 Å and have both high spectral (R ~ 10,000) and spatial (lesssim1'') resolution. The study includes all three major ionization states of oxygen, three Balmer lines, multiple lines of Fe ii and Fe iii, and the first data cubes ever acquired for important unblended diagnostic lines such as He ii λ4686, Ca i λ3933, and Mg i] λ4571. The data cubes generally sort according to excitation and have a relatively continuous progression from the highest-excitation ions (He ii, O iii) through the intermediate-excitation ions (O i and H i) to the lowest-excitation ions (Ca ii and Mg i). Merging the KCWI cubes with Hubble Space Telescope images leads to several new insights about the flow, including evidence for bow shocks, partial bow shocks, spur shocks, Mach disks, jet deflection shocks, a wiggling jet, and potential shock precursors. The most surprising result is that one of the velocity components of Fe ii in the Mach disk suddenly increases in flux relative to other lines by a factor of two, implying that the Mach disk vaporizes dust in the jet. Hence, jets must accelerate or entrain dust to speeds of over 300 km s−1 without destroying the grains.en_US
dc.identifier.citationHartigan, Patrick, Hillenbrand, Lynne A., Matuszewski, Matuesz, et al.. "Emission-line Data Cubes of the HH 32 Stellar Jet." <i>The Astronomical Journal,</i> 160, no. 4 (2020) IOP: https://doi.org/10.3847/1538-3881/abadfa.en_US
dc.identifier.doihttps://doi.org/10.3847/1538-3881/abadfaen_US
dc.identifier.urihttps://hdl.handle.net/1911/109415en_US
dc.language.isoengen_US
dc.publisherIOPen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by IOP.en_US
dc.subject.keywordHerbig-Haro objectsen_US
dc.subject.keywordStellar jetsen_US
dc.subject.keywordAstrophysical dust processesen_US
dc.subject.keywordShocksen_US
dc.titleEmission-line Data Cubes of the HH 32 Stellar Jeten_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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