J/A+A/534/A58ivo://CDS.VizieR/J/A+A/534/A58doi:10.26093/cds/vizier.35340058CDSPepe F.Lovis C.Segransan D.Benz W.Bouchy F.Dumusque X.Mayor M.,Queloz D.Santos N.C.Udry S.2017-06-26T11:50:28Z2011-10-03T08:04:23ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsradial-velocityIn 2009 we started, within the dedicated HARPS-Upgrade GTO program, an intense radial-velocity monitoring of a few nearby, slowly-rotating and quiet solar-type stars. The goal of this campaign is to gather, with high cadence and continuity, very-precise radial-velocity data in order to detect tiny signatures of very-low-mass stars potentially in the habitable zone of their parent stars. 10 stars have been selected among the most stable stars of the original HARPS high-precision program, uniformly spread in hour angle, such that three to four of them are observable at any time of the year. For each star we record 50 data points spread over the observing season. The data point consists of three nightly observations of a total integration time of 10 minutes each and separated by 2 hours. This is an observational strategy adopted to minimize stellar pulsation and granulation noise. In this paper we present the first results of this ambitious program. The radial-velocity data and the orbital parameters of five new and one confirmed low-mass planets around the stars HD 20794, HD 85512 and HD 192310, respectively, are reported and discussed, among which a system of three super-Earths and one harboring a 3.6-Earth-mass planet at the inner edge of the habitable zone. This result already confirms previous indications that low-mass planets seem to be very frequent around solar-type stars and that this occurrence frequency may be higher than 30%.2011A&A...534A..58Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/534/A58CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/474/293 : Radial velocities of GJ 674 (Bonfils+, 2007)J/A+A/469/L43 : Radial velocities of Gl 581 (Udry+, 2007)J/A+A/496/513 : RV of 6 stars with long-period giant planets (Moutou+, 2009)J/A+A/496/521 : Radial velocities of HD 45364 (Correia+, 2009)J/A+A/496/527 : Radial velocity of HD 47186 and HD 181433 (Bouchy+, 2009)J/A+A/507/487 : GJ 581 radial velocity curve (Mayor+, 2009)J/A+A/512/A46 : Radial velocities of BD-08 2823 (Hebrard+, 2010)J/A+A/512/A47 : Radial velocities of 3 stars with giant planets (Santos+ 2010)J/A+A/512/A48 : HD125612, HD215497, HIP5158 HARPS RV curves (Lo Curto+, 2010)J/A+A/523/A15 : RV data for the 8 targets (Naef+, 2010)J/A+A/526/A111 : HD 85390, 90156 and 103197 radial velocity (Mordasini+, 2011)J/A+A/526/A112 : Radial velocities of HARPS metal-poor sample (Santos+ 2011)J/A+A/526/A141 : HIP 85647 & Gl 676A radial velocities (Forveille+, 2011)J/A+A/527/L11 : HAT-P-6 radial velocity curve (Hebrard+, 2011)J/A+A/527/A63 : 7 new HARPS planetary systems radial velocities (Moutou+ 2011)J/A+A/528/A111 : GJ3634 radial velocity and 4.5um flux (Bonfils+, 2011)J/A+A/528/A112 : Radial velocities of HD 10180 (Lovis+, 2011)J/A+A/531/A24 : WASP-23 photometric and radial velocity data (Triaud+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/534/A58https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/534/A58http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/534/A58https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/534/A58https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/534/A58http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/534/A58GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/534/A58/table1HD 20794 HARPS datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Datedtime.epochdoubleRVRadial velocitykm/sspect.dopplerVeloc;pos.heliocentricdoublee_RVrms uncertainty on radial velocitykm/sstat.errordoubleFWHMCross-correlation function (CCF) FWHMkm/sspect.line.widthdoublee_FWHMrms uncertainty on CCF FWHMkm/sstat.error;phys.angSizedoubleSpanBisector span of the cross-correlation functionkm/sphys.velocdoublee_Spanrms uncertainty on bisector spankm/sstat.errordoublelogR'(HK)Activity index logR'(HK)phot.flux;arith.ratiofloate_logR'(HK)rms uncertainty on logR'(HK)stat.errorfloatJ/A+A/534/A58/table2HD 85512 HARPS datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Datedtime.epochdoubleRVRadial velocitykm/sspect.dopplerVeloc;pos.heliocentricdoublee_RVrms uncertainty on radial velocitykm/sstat.errordoubleFWHMCross-correlation function (CCF) FWHMkm/sspect.line.widthdoublee_FWHMrms uncertainty on CCF FWHMkm/sstat.error;phys.angSizedoubleSpanBisector span of the cross-correlation functionkm/sphys.velocdoublee_Spanrms uncertainty on bisector spankm/sstat.errordoublelogR'(HK)Activity index logR'(HK)phot.flux;arith.ratiofloate_logR'(HK)rms uncertainty on logR'(HK)stat.errorfloatJ/A+A/534/A58/table3HD 192310 HARPS datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Datedtime.epochdoubleRVRadial velocitykm/sspect.dopplerVeloc;pos.heliocentricdoublee_RVrms uncertainty on radial velocitykm/sstat.errordoubleFWHMCross-correlation function (CCF) FWHMkm/sspect.line.widthdoublee_FWHMrms uncertainty on CCF FWHMkm/sstat.error;phys.angSizedoubleSpanBisector span of the cross-correlation functionkm/sphys.velocdoublee_Spanrms uncertainty on bisector spankm/sstat.errordoublelogR'(HK)Activity index logR'(HK)phot.flux;arith.ratiofloate_logR'(HK)rms uncertainty on logR'(HK)stat.errorfloat