J/A+A/505/859ivo://CDS.VizieR/J/A+A/505/859doi:10.26093/cds/vizier.35050859CDSZechmeister M.Kuerster M.Endl M.2018-01-04T08:22:35Z2009-12-26T10:18:26ZCDS support team

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

cds-question@unistra.frm-starsdwarf-starsradial-velocityWe present radial velocity (RV) measurements of our sample of 40 M dwarfs from our planet search programme with VLT+UVES begun in 2000. Although with our RV precision down to 2-2.5m/s and timebase line of up to 7 years we are capable of finding planets of few Earth masses in the close-in habitable zones of M dwarfs, there is no detection of a planetary companion. To demonstrate this we present mass detection limits allowing us to exclude Jupiter mass planets up to 1AU for most of our sample stars. We identified 6 M dwarfs that host a brown dwarf or low mass stellar companion. With the exception of these, all other sample stars show low RV variability with an rms <20m/s. Some high proper motion stars exhibit a linear RV trend consistent with their secular acceleration. Furthermore, we examine our data sets for a possible correlation between RVs and stellar activity as seen in variations of the Halpha line strength. For Barnard's star we found a significant anticorrelation, but most of the sample stars do not show such a correlation.2009A&A...505..859Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/505/859CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/505/859https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/505/859http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/505/859https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/505/859https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/505/859http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/505/859GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/505/859/targets (Targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/505/859/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/505/859/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/505/859/targets?GETtext/xml+votable180.050000true269.45207644.69340140.0055555555555555566/16391 16462 16635 16910 20515 20896 21149 21171 21527 21646 22626 23286 24713 25154 29374 31781 33545 34924 35288 35366 35388 35830 36174 37942 38820 40250 41252 41591 41660 42314 42982 43569 43970 44541 45434 45543 46218 47206 47337 48902 48926https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/505/859?format=asciiOpticaldefaultJ/A+A/505/859/targetsTargetsplotVelocity curvemeta.ref.urlcharVmagV magnitudemagphot.mag;em.opt.VfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharONameOther namemeta.idcharNNumber of measurementsmeta.numberintTTime baselinedtime.intervalintsigmaRadial velocity scatterm/sstat.error;phys.veloc.dispersionfloat<sigma>Mean radial velocity measurement errorm/sstat.error;spect.dopplerVelocfloatComCommentmeta.notechardHeliocentric distance (1)pcpos.distance;pos.heliocentricfloatMassStellar mass (2)solMassphys.massfloatpmRAProper motion along RAmas/yrpos.pm;pos.eq.radoublee_pmRArms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion along DEmas/yrpos.pm;pos.eq.decdoublee_pmDErms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatplxParallax (1)maspos.parallax.trigfloate_plxrms uncertainty on plxmasstat.error;pos.parallaxfloatSASecular acceleration (d(RV(t))/dt)m.s**-1.yr**-1phys.accelerationfloate_SArms uncertainty on SAm.s**-1.yr**-1stat.errorfloatFileNameName of the file with radial velocity measurements in "rv" subdirectorymeta.id;meta.filecharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainSpTypeMK spectral typesrc.spTypechar