J/ApJ/860/124ivo://CDS.VizieR/J/ApJ/860/124doi:10.26093/cds/vizier.18600124CDSDong R.Liu S.-Y.Eisner J.Andrews S.Fung J.Zhu Z.Chiang E.,Hashimoto J.Liu H.B.Casassus S.Esposito T.Hasegawa Y.Muto T.,Pavlyuchenkov Y.Wilner D.Akiyama E.Tamura M.Wisniewski J.2019-08-21T10:36:54Z2019-07-31T13:49:55ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsmillimeter-astronomysubmillimeter-astronomySpatially resolved structures in protoplanetary disks hint at unseen planets. Previous imaging observations of the transitional disk around MWC 758 revealed an inner cavity, a ring-like outer disk, emission clumps, and spiral arms, all possibly generated by companions. We present ALMA dust continuum observations of MWC 758 at 0.87mm wavelength with 43x39mas angular resolution (6.9x6.2au) and 20{mu}Jy/beam rms. The central submillimeter emission cavity is revealed to be eccentric; once deprojected, its outer edge can be well fitted by an ellipse with an eccentricity of 0.1 and one focus on the star. The broad ring-like outer disk is resolved into three narrow rings with two gaps in between. The outer two rings tentatively show the same eccentricity and orientation as the innermost ring bounding the inner cavity. The two previously known dust emission clumps are resolved in both the radial and azimuthal directions, with radial widths equal to ~4x the local scale height. Only one of the two spiral arms previously imaged in near-infrared (NIR) scattered light is revealed in ALMA dust emission, at a slightly larger stellocentric distance owing to projection effects. We also submit evidence of disk truncation at ~100au based on comparing NIR imaging observations with models. The spirals, the north clump, and the truncated disk edge are all broadly consistent with the presence of one companion exterior to the spirals at roughly 100au.2018ApJ...860..124Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/860/124CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)J/ApJ/745/174 : Evolutionary models of young gas-giant planets (Spiegel+, 2012)J/A+A/556/A123 : Near-IR imaging polarimetry of HD142527 (Canovas+, 2013)J/A+A/560/A105 : SAO 206462 polarised Ks image (Garufi+, 2013)J/A+A/578/L6 : Polarized images of MWC758 (Benisty+, 2015)J/A+A/611/A74 : Angular differential imaging of MCW 758 (Reggiani+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/860/124https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/860/124http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/860/124https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/860/124https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/860/124http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/860/124GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/860/124/fits (Summary of the FITS files in subdirectory fits)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/860/124/fits?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/860/124/fits?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/860/124/fits?GETtext/xml+votable180.050000true82.6147225.332390.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJ/860/1246/24279https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/860/124?format=asciiMillimeterdefaultJ/ApJ/860/124/fitsSummary of the FITS files in subdirectory fitsrecnoRecord 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.mainNx[4500] Number of pixels along X-axis (NAXIS1)meta.numberintNy[4500] Number of pixels along Y-axis (NAXIS2)meta.numberintDateUTC observation datetime.epoch;obscharFreq[3.43493e+11/3.43493e+11] FrequenceHzem.freqdoubleSizeSize of the FITS fileKibytephys.size;meta.fitsintFileNameName of the file in subdirectory fits (1)meta.id;meta.filechar