J/A+A/649/A25ivo://CDS.VizieR/J/A+A/649/A25doi:10.26093/cds/vizier.36490025CDSde Boer J.Ginski C.Chauvin G.Menard F.Benisty M.Dominik C.,Maaskant K.Girard J.H.van der Plas G.Garufi A.Perrot C.Stolker T.,Avenhaus H.Bohn A.Delboulbe A.Jaquet M.Buey T.Moeller-Nilsson O.,Pragt J.Fusco T.2021-07-05T12:05:46Z2021-05-07T07:23:45ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starspolarimetryDuring the evolution of protoplanetary disks into planetary systems we expect to detect signatures that trace mechanisms such as planet-disk interaction. Protoplanetary disks display a large variety of structures in recently published high-spatial resolution images. However, the three-dimensional morphology of these disks is often difficult to infer from the two-dimensional projected images we observe. We aim to detect signatures of planet-disk interaction by studying the scattering surface of the protoplanetary disk around HD34282 We spatially resolved the disk using the high-contrast imager VLT/SPHERE in polarimetric imaging mode. We retrieved a profile for the height of the scattering surface to create a height-corrected deprojection, which simulates a face-on orientation. The detected disk displays a complex scattering surface. An inner clearing or cavity extending up to r<0.28" (88au) is surrounded by a bright inclined (i=56{deg}) ring with a position angle of 119{deg}. The center of this ring is offset from the star along the minor axis with 0.07", which can be explained with a disk height of 26au above the midplane. Outside this ring, beyond its southeastern ansa we detect an azimuthal asymmetry or blob at r~0.4". At larger separation, we detect an outer disk structure that can be fitted with an ellipse, which is compatible with a circular ring seen at r=0.62" (=190au) and a height of 77au. After applying a height-corrected deprojection we see a circular ring centered on the star at 88 au; what had seemed to be a separate blob and outer ring could now both be part of a single-armed spiral. We present the first scattered-light image of the disk around HD 34282 and resolve a disk with an inner cavity up to r~90au and a highly structured scattering surface of an inclined disk at a large height H_scat_/r=0.29" above the midplane at the inner edge of the outer disk. Based on the current data it is not possible to conclude decisively whether H_scat_/r remains constant or whether the surface is flared with at most H_scat_ {prop.to} r^1.35^, although we favor the constant ratio based on our deprojections. The height-corrected deprojection allows for a more detailed interpretation of the observed structures, from which we discern the first detection of a single-armed spiral in a protoplanetary disk.2021A&A...649A..25Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/649/A25CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/649/A25https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/649/A25http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/649/A25https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/649/A25https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/649/A25http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/649/A25GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/649/A25/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/649/A25/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/649/A25/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/649/A25/list?GETtext/xml+votable180.050000true79.00196-9.809830.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/649/A256/21418https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/649/A25?format=asciidefaultJ/A+A/649/A25/listList of fits imagesrecnoRecord 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.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar