J/A+A/591/A84ivo://CDS.VizieR/J/A+A/591/A84doi:10.26093/cds/vizier.35910084CDSAmmler-von Eiff M.Bedalov A.Kranhold C.Mugrauer M.Schmidt T.O.B.,Neuhaeuser R.Errmann R.2017-12-06T07:38:24Z2016-06-21T07:26:51ZCDS support team

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

cds-question@unistra.frmultiple-starsastrometryphotometryWe present the results of a survey to detect low-mass companions of Ursa Major (UMa) group members, carried out in 2003-2006 with NACO at the ESO VLT. While many extra-solar planets and planetary candidates have been found in close orbits around stars by the radial velocity and the transit methods, direct detections at wider orbits are rare. The UMa group, a young nearby stellar association at an age of about 200-600Myr, has not yet been addressed as a whole although its members represent a very interesting sample to search for and characterize substellar companions by direct imaging. Our goal was to find or to provide detection limits on wide substellar companions around nearby UMa group members using high-resolution imaging. We searched for faint companions around 20 UMa group members within 30pc. The primaries were placed below a semi-transparent coronagraph, a rarely used mode of NACO, to increase the dynamic range of the images. In most cases, second epoch images of companion candidates were taken to check whether they share common proper motion with the primary.2016A&A...591A..84Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/591/A84CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/105/226 : UMa Group (Soderblom+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/591/A84https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/591/A84http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/591/A84https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/591/A84https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/591/A84http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/591/A84GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/591/A84/stars (Basic stellar data of the stars in table D1 (from table A2 of the article))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/591/A84/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/591/A84/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/591/A84/stars?GETtext/xml+votable180.050000true27.3473333-10.70355560.0055555555555555566/4878 17486 21703 21726 22976 23342 23774 28696 36697 37508 491137.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/591/A84?format=asciiOpticaldefaultJ/A+A/591/A84/starsBasic stellar data of the stars in table D1 (from table A2 of the article)StarStar namemeta.id;meta.maincharprimaryDEJ2000Declination (J2000)pos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCandDisplay the astrometry and photometry of candidatesmeta.ref.urlcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainplxParallax (from Hipparcos, van Leeuwen, 2007, Cat. I/311)maspos.parallax.trigfloate_plxrms uncertainty on plxmasstat.error;pos.parallaxfloatSpTypeMK spectral type (1)src.spTypecharr_SpType[bcd] Reference for SpType (2)meta.ref;pos.framecharVmagV magnitudemagphot.mag;em.opt.VfloatKsmag2MASS Ks magnitude (Skrutskie et al., 2006, Cat. VII/233)magphot.mag;em.IR.KfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/591/A84/tabled1Astrometry and photometry of candidatese_SepDE1? Error bar of SepDE1arcsecstat.errorfloatnullableEpoch2? Date of 2nd epoch observation (1)time.epochnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of stellar target (HD or HIP ID)meta.id;meta.maincharEpoch1Date of 1st epoch observation (1)time.epochnullableIDSeq1Sequential ID of companion candidates in 1st epoch (IDNNNN)meta.idcharSepRA1? 1st epoch RA separation from central stararcsecpos.eq.ra;arith.difffloatnullablee_SepRA1? Error bar of SepRA1arcsecstat.errorfloatnullableSepDE1? 1st epoch DE separation from central stararcsecpos.eq.dec;arith.difffloatnullableIDSeq2Sequential ID of companion candidates in in 2nd epoch (IDNNNN) (2)meta.idcharSepRA2? 2nd epoch RA separation from central stararcsecpos.eq.ra;arith.difffloatnullablee_SepRA2? Error bar of SepRA2arcsecstat.errorfloatnullableSepDE2? 2nd epoch DE separation from central stararcsecpos.eq.dec;arith.difffloatnullablee_SepDE2? Error bar of SepDE2arcsecstat.errorfloatnullableKsmag? Ks band magnitude of candidate (3)magphot.mag;em.IR.Kfloatnullablee_Ksmag? Error bar of Ks band magnitudemagstat.error;phot.mag;em.IR.KfloatnullableoSepRA? Offset between epochs in (RA) (4)maspos.angDistanceintnullablee_oSepRA? Error bar of oSepRAmasstat.errorintnullableoSepDE? Offset between epochs (DE) (4)maspos.angDistanceintnullablee_oSepDE? Error bar of oSepDEmasstat.errorintnullable