J/A+A/648/A19ivo://CDS.VizieR/J/A+A/648/A19doi:10.26093/cds/vizier.36480019CDSWoelfer L.Facchini S.Kurtovic N.T.Teague R.van Dishoeck E.F.,Benisty M.Ercolano B.Lodato G.Miotello A.Rosotti G.Testi L.,Ubeira Gabellini M.G.2021-07-05T08:59:42Z2021-04-07T10:47:01ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsmillimeter-astronomysubmillimeter-astronomyco-line-emissionWe used spatially resolved ALMA observations of the three CO isotopologues ^12^CO, ^13^CO and C^18^O (J=2-1) from CQ Tau to analyse the brightness temperature and kinematics of the gas disc. We detect significant spiral structures in both the brightness temperature and the rotation velocity of ^12^CO after subtraction of an azimuthally symmetric model, which may be tracing planet-disc interactions with an embedded planet or low-mass companion. The brightness temperature spirals are morphologically connected to spirals observed in NIR scattered light in the same disc, indicating a common origin. Together with the observed large dust and gas cavity, these spiral structures support the hypothesis of a massive embedded companion in the CQ Tau disc.2021A&A...648A..19Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/648/A19CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/648/A19https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/648/A19http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/648/A19https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/648/A19https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/648/A19http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/648/A19GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/648/A19/list (List of FITS image cubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/648/A19/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/648/A19/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/648/A19/list?GETtext/xml+votable180.050000true83.9936224.748240.0055555555555555566/24277https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/648/A19?format=asciiMillimeterRadiodefaultJ/A+A/648/A19/listList of FITS image cubesrecnoRecord 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 slicesmeta.numberintObs.dateObservation datestime.epoch;obsnullableFreqRest frequencyGHzem.freqdoublebFreqLower value of frequency intervalGHzem.freq;stat.minfloatBFreqUpper value of frequency intervalGHzem.freq;stat.maxfloatdFreqFrequency resolutionHzspect.resolutionintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fits