J/AJ/161/78ivo://CDS.VizieR/J/AJ/161/78doi:10.26093/cds/vizier.51610078CDSMatthews E.C.Hinkley S.Stapelfeldt K.Vigan A.Mawet D.,Crossfield I.J.M.David T.J.Mamajek E.Meshkat T.Morales F.,Padgett D.2021-07-05T13:17:15Z2021-05-19T06:40:51ZCDS support team

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

cds-question@unistra.frexoplanetsm-starsastrometryinfrared-astronomyDebris disk stars are good targets for high-contrast imaging searches for planetary systems, since debris disks have been shown to have a tentative correlation with giant planets. We selected 20 stars identified as debris disk hosts by the WISE mission, with particularly high levels of warm dust. We observed these with the VLT/SPHERE high-contrast imaging instrument with the goal of finding planets and imaging the disks in scattered light. Our survey reaches a median 5{sigma} sensitivity of 10.4MJ at 25au and 5.9MJ at 100au. We identified three new stellar companions (HD18378B, HD19257B, and HD133778B): two are mid-M-type stars and one is a late-K or early-M star. Three additional stars have very widely separated stellar companions (all at >2000au) identified in the Gaia catalog. The stars hosting the three SPHERE-identified companions are all older (>~700Myr), with one having recently left the main sequence and one a giant star. We infer that the high volumes of dust observed around these stars has been caused by a recent collision between the planets and planetesimal belts in the system, although for the most evolved star, mass loss could also be responsible for the infrared excess. Future mid-infrared spectroscopy or polarimetric imaging may allow the positions and spatial extent of these dust belts to be constrained, thereby providing evidence as to the true cause of the elevated levels of dust around these old systems. None of the disks in this survey is resolved in scattered light.2021AJ....161...78Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/78CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC1989)I/259 : The Tycho-2 Catalogue (Hog+ 2000)II/311 : WISE All-Sky Data Release (Cutri+ 2012)I/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+,2007)J/A+AS/85/915 : Walraven Photometry southern OB associations (de Geus+,1990)J/A+AS/104/429 : uvby Photometry of G-type dwarfs (Olsen 1994)J/ApJS/99/135 : Rotation and Spectral Peculiarities (Abt+ 1995)J/AJ/117/354 : OB associations from Hipparcos (de Zeeuw+, 1999)J/ApJ/541/841 : UBV photometry and ages of Trapezium systems (Abt+, 2000)J/MNRAS/313/43 : OB association members in ACT+TRC Catalogs (Hoogerwerf, 2000)J/ApJ/620/1010 : Spitzer 24{mu}m photometry of A dwarfs (Rieke+, 2005)J/ApJ/653/675 : Spitzer 24{mu}m photometry of A dwarfs (Su+, 2006)J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)J/ApJ/660/1556 : Characterization of dusty debris disks (Rhee+, 2007)J/ApJS/168/297 : Stellar parameters of nearby cool stars (Takeda+, 2007)J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)J/MNRAS/416/3108 : Membership of Sco OB2 moving group (Rizzuto+, 2011)J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)J/ApJ/756/133 : ScoCen debris disks around B- and A-type stars (Chen+, 2012)J/MNRAS/426/91 : Kepler stars with infrared excess (Kennedy+, 2012)J/MNRAS/427/343 : Infrared excesses of Hipparcos stars (McDonald+, 2012)J/ApJ/745/147 : Binaries among debris disk stars (Rodriguez+, 2012)J/A+A/537/A120 : Rotational velocities of A-type stars. IV. (Zorec+, 2012)J/ApJS/208/29 : HIP stars with 22{mu}m excess (Wu+, 2013)J/ApJS/211/25 : Spitzer/IRS debris disk catalog. I. (Chen+, 2014)J/ApJS/212/10 : WISE IR excesses for stars within 75pc (Patel+, 2014)J/ApJ/794/146 : M dwarfs with IR excess (Theissen+, 2014)J/ApJ/804/146 : Atmospheric parameters for nearby B-F stars (David+, 2015)J/ApJS/225/15 : IR excess stars from Tycho-2 and AllWISE (Cotten+, 2016)J/A+A/594/A63 : International Deep Planet Survey results (Galicher+, 2016)J/A+A/591/A108 : HD61005 SPHERE H and Ks images (Olofsson+, 2016)J/MNRAS/461/794 : Scorpius-Centaurus K-Type Stars (Pecaut+, 2016)J/A+A/587/A57 : HR 8799e and HR 8799d spectra (Zurlo+, 2016)J/AJ/154/245 : Imaging survey Spitzer-detected debris disks (Meshkat+, 2017)J/AJ/153/165 : Collisions of terrestrial worlds (Theissen+, 2017)J/A+A/603/A3 : VLT/NaCo Large program. IV. Statistical analysis (Vigan+,2017)J/ApJ/856/23 : BANYAN. XI. The BANYAN {Sigma} algorithm (Gagne+, 2018)J/ApJ/868/43 : AO images of WISE YSO candidates (Silverberg+, 2018)J/A+A/624/A87 : Discovery of a resolved disk around Wray 15-788 (Bohn+, 2019)J/AJ/158/13 : The first 300 stars observed by the GPIES (Nielsen+, 2019)J/AJ/160/24 : Circumstellar dust of 104 stars with GPIES (Esposito+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/78https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/78/table3 (Astrometry for each individual candidate at each epoch)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/78/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/78/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/78/table3?GETtext/xml+votable180.050000true43.5565733-62.23440920.0055555555555555566/875 29259 33550 37237 42655 42746 42875 43115 43279 44142 44688 47708 47717 48021https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/78?format=asciiInfrareddefaultJ/AJ/161/78/table3Astrometry for each individual candidate at each epochrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget identificationmeta.id;meta.maincharObs[2015/2018] Observation date, yeartime.epoch;obsNcand[1/98] Candidate number for Targetmeta.numberintPA[0.88/359]? Position angle, east of northdegpos.posAngfloatnullableflag[1/2]? observation flag (1)meta.code.errorintnullablee_PA[0.14/0.47]? Uncertainty in PAdegstat.errorfloatnullableSep[349/6316]? Separationmaspos.angDistancefloatnullablee_Sep[2/12]? Uncertainty in Sepmasstat.errorfloatnullabledRA[-5839/6008]? Offset in Right Ascensionmaspos.eq.ra;arith.difffloatnullablee_dRA[2.8/14.7]? Uncertainty in dRAmasstat.errorfloatnullabledDE[-5845/5995]? Offset in Right Ascensionmaspos.eq.dec;arith.difffloatnullablee_dDE[2.8/14.7]? Uncertainty in dDEmasstat.errorfloatnullablestatusStatus of candidate (2)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.main