J/A+A/543/A45ivo://CDS.VizieR/J/A+A/543/A45doi:10.26093/cds/vizier.35430045CDSMortier A.Santos N.C.Sozzetti A.Mayor M.Latham D.Bonfils X.,Udry S.2017-09-27T05:55:59Z2012-06-25T07:54:33ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsgiant-starsThe discovery of about 700 extrasolar planets, so far, has lead to the first statistics concerning extrasolar planets. The presence of giant planets seems to depend on stellar metallicity and mass. For example, they are more frequent around metal-rich stars, with an exponential increase in planet occurrence rates with metallicity. We analyzed two samples of metal-poor stars (-2.0<[Fe/H]<0.0) to see if giant planets are indeed rare around these objects. Radial velocity datasets were obtained with two different spectrographs (HARPS and HIRES). Detection limits for these data, expressed in minimum planetary mass and period, are calculated. These produce trustworthy numbers for the planet frequency. A general Lomb Scargle (GLS) periodogram analysis was used together with a bootstrapping method to produce the detection limits. Planet frequencies were calculated based on a binomial distribution function within metallicity bins. Almost all hot Jupiters and most giant planets should have been found in these data. Hot Jupiters around metal-poor stars have a frequency lower than 1.0% at one sigma. Giant planets with periods up to 1800 days, however, have a higher frequency of 2.63^+2.5^_-0.89_%. Taking into account the different metallicities of the stars, we show that giant planets appear to be very frequent (4.48^+4.04^_-1.38_%) around stars with [Fe/H]>-0.7, while they are rare around stars with [Fe/H]<-0.7. We conclude that giant planet frequency is indeed a strong function of metallicity, even in the low-metallicity tail. However, the frequencies are most likely higher than previously thought.2012A&A...543A..45Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/543/A45CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/697/544 : Planets orbiting metal-poor dwarfs. II. (Sozzetti+, 2009)J/A+A/526/A99 : Metal-poor solar-type stars spectroscopy & masses (Sousa+ 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/543/A45https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/543/A45http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/543/A45https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/543/A45https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/543/A45http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/543/A45GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/543/A45/table1 (Relevant values for the stars in the samples)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/543/A45/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/543/A45/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/543/A45/table1?GETtext/xml+votable180.050000true266.8665375-8.77992690.0055555555555555566/23 47 373 710 733 758 798 944 1556 1583 1626 1642 2133 2141 2488 3072 3444 4455 4526 5589 5614 5793 6256 6277 6679 6721 6793 7016 7087 7141 7565 7683 8195 8235 8253 8532 8802 8873 9058 9082 10426 10579 10886 11004 11176 11263 11270 11512 11612 11935 12332 12424 12451 12650 12704 12714 12854 12901 13028 13055 13075 13162 14534 14778 14881 14931 15009 15722 15727 15818 16759 17047 17206 17245 17249 17332 17564 17726 17744 17795 17923 17947 17952 18035 18561 18615 18827 18839 18867 18883 19179 19217 19272 19466 19626 19848 20020 20082 20495 20661 21128 21550 21696 21809 21989 22048 22118 22518 22527 22754 23015 23096 23213 23785 23886 24048 24099 24249 24353 24775 24853 24876 25015 25136 25981 26292 26305 26324 26522 26576 27255 27661 27741 27915 27981 28038 28336 28421 28664 29006 29521 29596 29765 29833 29941 29958 30047 30166 30196 30233 30296 30577 30825 30907 30974 31048 31100 31172 31347 31480 31503 31520 31650 31770 31772 31813 32072 32100 32335 32751 34684 35152 36527 36540 36586 37164 37232 37252 37789 37831 37995 38138 38216 38283 38566 38986 39030 39316 39984 40965 40988 41107 41460 41591 42166 42928 43001 43068 43280 43287 43310 43567 43641 44015 44426 44608 44653 44683 44816 44910 44951 45022 45446 45682 45721 45837 45907 46053 46076 47137 47674 47930 48260 48335 48490 48495 48731 48736 48763 48846 49028 49035 49042https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/543/A45?format=asciidefaultJ/A+A/543/A45/table1Relevant values for the stars in the samplesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharNAmount of measurementsmeta.numberintrmsMean rms of measurementsm/sinstr.det.noisefloattspanTimespan of the measurementsdtime.intervalintTeffEffective temperatureKphys.temperature.effectiveinte_Teff? rms uncertainty on TeffKstat.error;phys.temperature.effectiveintnullable[Fe/H]Metallicitylog(Sun)phys.abund.Zfloate_[Fe/H]? rms uncertainty on [Fe/H]log(Sun)stat.error;phys.abund.FefloatnullableMassStellar masssolMassphys.massfloate_Mass? rms uncertainty on MasssolMassstat.error;phys.massfloatnullableSampleSample the star belongs to (HARPS or KECK)meta.id;instrcharRef[1/2] Reference (1)meta.ref;pos.frameintdataDisplay reference datameta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_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.main