J/A+A/681/L2ivo://CDS.VizieR/J/A+A/681/L2doi:10.26093/cds/vizier/bc-n9/wcCDSRen B.B.Xie C.Benisty M.Dong R.Bae J.Stolker T.,van Holstein R.G.Debes J.H.Garufi A.Ginski C.Kraus S.2026-07-03T06:35:56Z2023-12-22T12:49:14ZCDS support team

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

cds-question@unistra.frvariable-starsinterstellar-mediumpolarimetryinfrared-astronomyWhile nearly two dozen spiral arms have been detected from planet-forming disks in near-infrared scattered light, none of their substellar drivers has been confirmed. By observing spiral systems in at least two epochs spanning multiple years and measuring the motion of the spirals, we can distinguish what causes the spirals and locate the orbits of the driving planets if the spirals are triggered by them. Upon a recent validation of this approach using the comotion between a stellar companion and a spiral, we obtained a second-epoch observation for the spiral system in the disk of V1247 Ori in the H-band polarized scattered light using Very Large Telescope (VLT), SPHERE, and IRDIS. By combining our observations with archival IRDIS data, we established a 4.8yr timeline to constrain the spiral motion of V1247 Ori. We obtained a pattern speed of 0.40+/-0.10deg/yr for the northeast spiral. This corresponds to an orbital period of 900+/-220yr, and the semimajor axis of the hidden planetary driver therefore is 118+/-20au for a 2.0+/-0.1M_{sun}_ central star. The location agrees with the gap in ALMA dust-continuum observations, which provides joint support for the hypothesis that a companion drives the scattered-light spirals while carving a millimeter gap. With an angular separation of 0.29"+/-0.05", this hidden companion is an ideal target for JWST imaging.2024A&A...681L...2Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/681/L2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/681/L2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/681/L2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/681/L2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/681/L2https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/681/L2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/681/L2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/681/L2/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/681/L2/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/681/L2/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/681/L2/list?GETtext/xml+votable180.050000true84.521875-1.2560250.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/681/L26/22861https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/681/L2?format=asciiInfrareddefaultJ/A+A/681/L2/listList of fits imagesDEJ2000Declination (J2000)pos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datetime.epoch;obsnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar