J/A+A/622/A156ivo://CDS.VizieR/J/A+A/622/A156doi:10.26093/cds/vizier.36220156CDSCugno G.Quanz S.P.Hunziker S.Stolker T.Schmid H.M.Avenhaus H.,Baudoz P.Bohn A.J.Bonnefoy M.Buenzli E.Chauvin G.Cheetham A.,Desidera S.Dominik C.Feautrier P.Feldt M.Ginski C.Girard J.H.,Gratton R.Hagelberg J.Hugot E.Janson M.Lagrange A.-M.Langlois M.,Magnard Y.Maire A.-L.Menard F.Meyer M.Milli J.Mordasini C.,Pinte C.Pragt J.Roelfsema R.Rigal F.Szulagyi J.van Boekel R.,van der Plas G.Vigan A.Wahhaj Z.Zurlo A.2019-02-26T12:45:58Z2019-02-15T08:25:44ZCDS support team

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

cds-question@unistra.fremission-line-starsvisible-astronomyh-alpha-photometryIn recent years, our understanding of giant planet formation progressed substantially. There have even been detections of a few young protoplanet candidates still embedded in the circumstellar disks of their host stars. The exact physics that describes the accretion of material from the circumstellar disk onto the suspected circumplanetary disk and eventually onto the young, forming planet is still an open question. We seek to detect and quantify observables related to accretion processes occurring locally in circumstellar disks, which could be attributed to young forming planets. We focus on objects known to host protoplanet candidates and/or disk structures thought to be the result of interactions with planets. We analyzed observations of six young stars and their surrounding environments with the SPHERE/ZIMPOL instrument on the Very Large Telescope (VLT) in the H{alpha} filter (656nm) and a nearby continuum filter (644.9nm). We redetect the known accreting M-star companion HD142527 B with the highest published signal to noise to date in both H{alpha} and the continuum. No other companions are detected. We analyzed observations of six young stars (age 3.5-10Myr) and their surrounding environments with the SPHERE/ZIMPOL instrument on the Very Large Telescope (VLT) in the H{alpha}filter (656nm) and a nearby continuum filter (644.9nm). We applied several point spread function (PSF) subtraction techniques to reach the highest possible contrast near the primary star, specifically investigating regions where forming companions were claimed or have been suggested based on observed disk morphology.2019A&A...622A.156Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/622/A156CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/622/A156https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/622/A156http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/622/A156https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/622/A156https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/622/A156http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/622/A156GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/622/A156/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/622/A156/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/622/A156/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/622/A156/list?GETtext/xml+votable180.050000true233.356-70.19478890.0055555555555555566/21012 28762 38382 41181 42595 44049https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/622/A156?format=asciiOpticaldefaultJ/A+A/622/A156/listList of fits imagesTitleTitle of the FITS filemeta.title;meta.fitscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.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.fitscharSimbadSimbad column added by the CDSmeta.ref.urlchar