J/A+A/544/A106ivo://CDS.VizieR/J/A+A/544/A106doi:10.26093/cds/vizier.35440106CDSBazot M.Campante T.L.Chaplin W.J.Carfantan H.Bedding T.R.,Dumusque X.Broomhall A.-M.Petit P.Theado S.Van Grootel V.,Arentoft T.Castro M.Christensen-Dalsgaard J.do Nascimento Jr J.-D.,Dintrans B.Kjeldsen H.Monteiro M.J.P.F.G.Santos N.C.Sousa S.,Vauclair S.2017-06-27T06:38:50Z2012-08-09T08:12:30ZCDS support team

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

cds-question@unistra.frg-starsspectroscopyastronomical-modelsSolar twins have been a focus of attention for more than a decade, because their structure is extremely close to that of the Sun. Today, thanks to high-precision spectrometers, it is possible to use asteroseismology to probe their interiors. Our goal is to use time series obtained from the HARPS spectrometer to extract the oscillation frequencies of 18 Sco, the brightest solar twin. We used the tools of spectral analysis to estimate these quantities. We estimate 52 frequencies using a Markov Chain Monte-Carlo (MCMC) algorithm. After examination of their probability densities and comparison with results from direct MAP optimization, we obtain a minimal set of 21 reliable modes. The identification of each pulsation mode is straightforwardly accomplished by comparing to the well-established solar pulsation modes. We also derived some basic seismic indicators using these values. These results offer a good basis to start a detailed seismic analysis of 18 Sco using stellar models.2012A&A...544A.106Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/544/A106CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/544/A106https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/544/A106http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/544/A106https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/544/A106https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/544/A106http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/544/A106GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/544/A106/mcmcMarkov Chain obtain from our MCMC simulation. A burn-in sequence has been removed.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintnu1Frequency 1 (l=0)Hzem.freq;src.vardoublenu2Frequency 2 (l=0)Hzem.freq;src.vardoublenu3Frequency 3 (l=0)Hzem.freq;src.vardoublenu4Frequency 4 (l=0)Hzem.freq;src.vardoublenu5Frequency 5 (l=0)Hzem.freq;src.vardoublenu6Frequency 6 (l=0)Hzem.freq;src.vardoublenu7Frequency 7 (l=0)Hzem.freq;src.vardoublenu8Frequency 8 (l=0)Hzem.freq;src.vardoublenu9Frequency 9 (l=0)Hzem.freq;src.vardoublenu10Frequency 10 (l=0)Hzem.freq;src.vardoublenu11Frequency 11 (l=0)Hzem.freq;src.vardoublenu12Frequency 12 (l=0)Hzem.freq;src.vardoublenu13Frequency 13 (l=0)Hzem.freq;src.vardoublenu14Frequency 14 (l=1)Hzem.freq;src.vardoublenu15Frequency 15 (l=1)Hzem.freq;src.vardoublenu16Frequency 16 (l=1)Hzem.freq;src.vardoublenu17Frequency 17 (l=1)Hzem.freq;src.vardoublenu18Frequency 18 (l=1)Hzem.freq;src.vardoublenu19Frequency 19 (l=1)Hzem.freq;src.vardoublenu20Frequency 20 (l=1)Hzem.freq;src.vardoublenu21Frequency 21 (l=1)Hzem.freq;src.vardoublenu22Frequency 22 (l=1)Hzem.freq;src.vardoublenu23Frequency 23 (l=1)Hzem.freq;src.vardoublenu24Frequency 24 (l=1)Hzem.freq;src.vardoublenu25Frequency 25 (l=1)Hzem.freq;src.vardoublenu26Frequency 26 (l=1)Hzem.freq;src.vardoublenu27Frequency 27 (l=2)Hzem.freq;src.vardoublenu28Frequency 28 (l=2)Hzem.freq;src.vardoublenu29Frequency 29 (l=2)Hzem.freq;src.vardoublenu30Frequency 30 (l=2)Hzem.freq;src.vardoublenu31Frequency 31 (l=2)Hzem.freq;src.vardoublenu32Frequency 32 (l=2)Hzem.freq;src.vardoublenu33Frequency 33 (l=2)Hzem.freq;src.vardoublenu34Frequency 34 (l=2)Hzem.freq;src.vardoublenu35Frequency 35 (l=2)Hzem.freq;src.vardoublenu36Frequency 36 (l=2)Hzem.freq;src.vardoublenu37Frequency 37 (l=2)Hzem.freq;src.vardoublenu38Frequency 38 (l=2)Hzem.freq;src.vardoublenu39Frequency 39 (l=2)Hzem.freq;src.vardoublenu40Frequency 40 (l=3)Hzem.freq;src.vardoublenu41Frequency 41 (l=3)Hzem.freq;src.vardoublenu42Frequency 42 (l=3)Hzem.freq;src.vardoublenu43Frequency 43 (l=3)Hzem.freq;src.vardoublenu44Frequency 44 (l=3)Hzem.freq;src.vardoublenu45Frequency 45 (l=3)Hzem.freq;src.vardoublenu46Frequency 46 (l=3)Hzem.freq;src.vardoublenu47Frequency 47 (l=3)Hzem.freq;src.vardoublenu48Frequency 48 (l=3)Hzem.freq;src.vardoublenu49Frequency 49 (l=3)Hzem.freq;src.vardoublenu50Frequency 50 (l=3)Hzem.freq;src.vardoublenu51Frequency 51 (l=3)Hzem.freq;src.vardoublenu52Frequency 52 (l=3)Hzem.freq;src.vardoubleGamma1Linewidth {Gamma}_1_ of Lorentzian at 2800{mu}HzHzstat.fit.paramdoubleGamma2Linewidth {Gamma}_2_ of Lorentzian at 3600{mu}HzHzstat.fit.paramdouble