J/AJ/167/127ivo://CDS.VizieR/J/AJ/167/127doi:10.26093/cds/vizier.51670127CDSBajaj N.S.Pascucci I.Gorti U.Alexander R.Sellek A.Morrison J.,Gaspar A.Clarke C.Xie C.Ballabio G.Deng D.2024-11-06T20:19:29Z2024-05-31T12:23:19ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frg-starsinfrared-astronomyspectroscopyUnderstanding when and how circumstellar disks disperse is crucial to constrain planet formation and migration. Thermal winds powered by high-energy stellar photons have long been theorized to drive disk dispersal. However, evidence for these winds is currently based only on small (~3-6km/s) blueshifts in [NeII] 12.81{mu}m lines, which does not exclude MHD winds. We report JWST MIRI MRS spectro-imaging of TCha, a disk with a large dust gap (~30au in radius) and blueshifted [NeII] emission. We detect four forbidden noble gas lines, [ArII], [ArIII], [NeII], and [NeIII], of which [ArIII] is the first detection in any protoplanetary disk. We use line flux ratios to constrain the energy of the ionizing photons and find that argon is ionized by extreme ultraviolet, whereas neon is most likely ionized by X-rays. After performing continuum and point-spread function subtraction on the integral field unit cube, we discover a spatial extension in the [NeII] emission off the disk continuum emission. This is the first spatially resolved [NeII] disk wind emission. The mostly ionic spectrum of TCha, in combination with the extended [NeII] emission, points to an evolved stage for any inner MHD wind and is consistent with the existence of an outer thermal wind ionized and driven by high-energy stellar photons. This work acts as a pathfinder for future observations aiming at investigating disk dispersal using JWST.2024AJ....167..127Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/127CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/480/735 : Young local stellar associations (Fernandez+, 2008)J/MNRAS/435/1325 : Membership of the {epsilon} Cha association (Murphy+, 2013)J/A+A/620/A87 : Ejection processes in NGC 2264 (McGinnis+, 2018)J/AJ/161/87 : Gaia data for members of eCha (Dickson-Vandervelde+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/167/127https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/167/127http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/167/127https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/167/127https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/167/127http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/167/127GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/AJ/167/127/fig1The JWST MIRI MRS spectrum of T CharecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWave[4.9/28.8] Wavelengthumem.wldoubleFlux[0/4.58]? Flux densityJyphot.flux.density;em.IRdoublenullable