J/A+A/553/A27ivo://CDS.VizieR/J/A+A/553/A27doi:10.26093/cds/vizier.35530027CDSKorhonen H.Gonzalez J.F.Briquet M.Flores SorianoM.Hubrig S.,Savanov I.Hackman T.Ilyin I.V.Eulaers E.and Pessemier W.2017-07-03T14:27:07Z2013-04-25T08:34:31ZCDS support team

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

cds-question@unistra.frmultiple-starsb-starsradial-velocityspectroscopyTime series of high-resolution spectra of the late B-type star HD 11753 exhibiting HgMn chemical peculiarity are used to study the surface distribution of different chemical elements and their temporal evolution. High-resolution and high signal-to-noise ratio spectra were obtained using the CORALIE spectrograph at La Silla in 2000, 2009, and 2010. Surface maps of YII, SrII, TiII, and CrII were calculated using the Doppler imaging technique. The results were also compared to equivalent width measurements. The evolution of chemical spots both on short and long time scales were investigated. We determine the binary orbit of HD 11753 and fine-tune the rotation period of the primary. The earlier discovered fast evolution of the chemical spots is confirmed by an analysis using both the chemical spot maps and equivalent width measurements. In addition, a long-term decrease in the overall YII and SrII abundances is discovered. A detailed analysis of the chemical spot configurations reveals some possible evidence that a very weak differential rotation is operating in HD 11753.2013A&A...553A..27Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/553/A27CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/553/A27https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/553/A27http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/553/A27https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/553/A27https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/553/A27http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/553/A27GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/553/A27/rvRadial velocities of HD 11753recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date (HJD-2400000)dtime.epochdoublePhaseOrbital phasetime.phasefloatRVRadial velocity measurementkm/sphys.veloc;pos.heliocentricfloate_RVError of the measurementkm/sstat.errorfloatO-CResidual observed-minus-calculatedkm/sstat.fit.residualfloatInst[HCFR] Instrument information (1)meta.note;instrchar