J/A+A/596/A76ivo://CDS.VizieR/J/A+A/596/A76doi:10.26093/cds/vizier.35960076CDSSissa E.Gratton R.Desidera S.Martinez Fiorenzano A.F.,Bonfanti A.Carolo E.Vassallo D.Claudi R.U.Endl M.Cosentino R.2018-03-20T13:23:06Z2016-12-02T08:02:04ZCDS support team

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

cds-question@unistra.frmultiple-starsradial-velocityspectroscopyStellar activity influences radial velocity (RV) measurements and can also mimic the presence of orbiting planets. As part of the search for planets around the components of wide binaries performed with the SARG High Resolution Spectrograph at the TNG, it was discovered that HD 200466A shows strong variation in RV that is well correlated with the activity index based on H{alpha}. We used SARG to study the H{alpha} line variations in each component of the binaries and a few bright stars to test the capability of the H{alpha} index of revealing the rotation period or activity cycle. We also analysed the relations between the average activity level and other physical properties of the stars. We finally tried to reveal signals in the RVs that are due to the activity. At least in some cases the variation in the observed RVs is due to the stellar activity. We confirm that H{alpha} can be used as an activity indicator for solar-type stars and as an age indicator for stars younger than 1.5Gyr.2016A&A...596A..76Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/596/A76CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/596/A76https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/596/A76http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/596/A76https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/596/A76https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/596/A76http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/596/A76GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/596/A76/table1 (Stellar parameters and SARG data (sum of tables 1 and 2 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/596/A76/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/596/A76/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/596/A76/table1?GETtext/xml+votable180.050000true242.601310643.8176450.0055555555555555566/548 1288 2284 3119 3319 3644 4009 4241 4597 4734 5831 5853 5907 8366 8614 8815 8952 9046 9403 9843 10358 10517 10954 11031 11180 11267 11969 12046 13297 13301 13326 13710 13987 14459 14822 17425 17441 18647 18748 19056 20145 22708 23319 25466 25906 27088 27646 27743 28270 28484 31261 31393 31621 32617 40293 40686 48915https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/596/A76?format=asciidefaultJ/A+A/596/A76/table1Stellar parameters and SARG data (sum of tables 1 and 2 of the paper)SimbadNameSimbad column added by the CDSmeta.idcharNobsNumber of observationsmeta.numberintJD0First observation (JD-2450000)dobs.param;obsdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharprimaryVmagV apparent magnitudemagphot.mag;em.opt.VfloatB-VB-V color indexmagphot.color;em.opt.B;em.opt.VfloatlogRHKlogR_HK activity indexphot.flux;arith.ratiofloatn_logRHK[DXU] Note on logRHK (1)meta.notecharVsiniProjected velocitykm/sphys.velocfloatTTemperatureKphys.temperatureintJDfLast observation (JD-2450000)dobs.param;obsdouble<Ha>Average value of H{alpha} indexspect.index;em.line.Halpha;stat.meanfloatDHaH{alpha} excessspect.index;em.line.Halphafloate_<Ha>Standard deviation of H{alpha} indexstat.errorfloatHaCShow the H{alpha} time seriesmeta.ref.urlchar_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.mainJ/A+A/596/A76/table5H{alpha} time seriesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharJDJulian date (JD-2450000)dtime.epochdoubleHa? H{alpha} indexspect.index;em.line.Halphadoublenullablee_Ha? H{alpha} index errorstat.errordoublenullableNote[0/1] Note (1)meta.noteint