J/A+A/670/L1ivo://CDS.VizieR/J/A+A/670/L1doi:10.26093/cds/vizier.36709001CDSStadler J.Benisty M.Izquierdo A.Facchini S.Teague R.Kurtovic N.,Pinilla P.Bae J.Ansdell M.Loomis R.Mayama S.Perez L.M.Testi L.2024-11-06T20:02:51Z2023-01-27T09:45:53ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsgalaxy-classification-systemsmillimeter-astronomysubmillimeter-astronomyTransition disks are protoplanetary disks with inner cavities possibly cleared by massive companions. Observing them at high resolution is ideal for mapping their velocity structure and probing companion-disk interactions. We present Atacama Large Millimeter/submillimeter Array (ALMA) Band 6 dust and gas observations of the transition disk around RXJ1604.3-2130 A, known to feature nearly symmetric shadows in scattered light, and aim to search for non-Keplerian features. We studied the 12CO line channel maps and moment maps of the line-of-sight velocity and peak intensity. We fitted a Keplerian model of the channel-by-channel emission to study line profile differences and produced deprojected radial profiles for all velocity components. The ^12^CO emission is detected out to R~1.8" (265au). It shows a cavity inward of 0.39" (~56au) and within the dust continuum ring (at ~0.56", i.e., 81au). Azimuthal brightness variations in the ^12^CO line and dust continuum are broadly aligned with the shadows detected in scattered-light observations. We find a strong localized non-Keplerian feature toward the west within the continuum ring at R=41+/-10au and PA=280+/-2deg. It accounts Dv_phi_/v_kep_~0.4 or Dv_z_/v_kep_~0.04, depending on if the perturbation is in the rotational or vertical direction. A tightly wound spiral is also detected and extends over 300deg in azimuth, possibly connected to the localized non-Keplerian feature. Finally, a bending of the iso-velocity contours within the gas cavity indicates a highly perturbed inner region, possibly related to the presence of a misaligned inner disk. While broadly aligned with the scattered-light shadows, the localized non-Keplerian feature cannot be solely due to changes in temperature. Instead, we interpret the kinematical feature as tracing a massive companion located at the edge of the dust continuum ring. We speculate that the spiral is caused by buoyancy resonances driven by planet-disk interactions. However, this potential planet at ~41au cannot explain the gas-depleted cavity, the low accretion rate, and the misaligned inner disk, which suggests the presence of another companion closer in.2023A&A...670L...1Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/670/L1CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/598/A43 : 2MASS J16042165-2130284 high-contrast images (Canovas+, 2017)J/A+A/633/A37 : RXJ1604.3-2130A griz and JHK light curveshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/670/L1https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/670/L1http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/670/L1https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/670/L1https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/670/L1http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/670/L1GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/670/L1/list (*Information of fits datacube)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/670/L1/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/670/L1/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/670/L1/list?GETtext/xml+votable180.050000true241.09015-21.508060.0055555555555555566/44361https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/670/L1?format=asciiOpticalMillimeterdefaultJ/A+A/670/L1/list*Information of fits datacuberecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNzNumber of pixels along Z-axismeta.numberintObs.dateObservation datestime.epoch;obsnullablebFREQLower value of frequency intervalHzem.freqdoubleBFREQUpper value of frequency intervalHzem.freqdoubledFREQFrequency resolutionHzspect.resolutionfloatsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fits