Title : The radius and mass of the close solar twin 18 Scorpii derived from asteroseismology and interferometry Language : English Author, co-author : Bazot, Michaël [Centro de Astrofísica da Universidade do Porto > >] Ireland, M. J. [University of Sydney > School of Physics > Sydney Institute for Astronomy (SIfA) >] Huber, D. [University of Sydney > School of Physics > Sydney Institute for Astronomy (SIfA) >] Bedding, T. R. [University of Sydney > School of Physics > Sydney Institute for Astronomy (SIfA) >] Broomhall, A.-M. [University of Birmingham > School of Physics and Astronomy >] Campante, A.-M. [Centro de Astrofísica da Universidade do Porto > >] Carfantan, H. [Université de Toulouse > Laboratoire Astrophysique de Toulouse - Tarbes >] Chaplin, W. J. [University of Birmingham > School of Physics and Astronomy >] Elsworth, Y. [University of Birmingham > School of Physics and Astronomy >] Melendez, J. [Centro de Astrofísica da Universidade do Porto > >] Petit, Pascal [Université de Toulouse > Laboratoire Astrophysique de Toulouse - Tarbes >] Théado, Sylvie [Université de Toulouse > Laboratoire Astrophysique de Toulouse - Tarbes >] Van Grootel, Valérie [Université de Toulouse > Laboratoire Astrophysique de Toulouse - Tarbes > > >] Arentoft, T. [Aarhus Universitet > Institut for Fysik og Astronomi >] Asplund, M. [> >] Castro, M. [> >] Christensen-Dalsgaard, J. [> >] Do Nascimento, J. D. [> >] Dintrans, B. [> >] Dumusque, X. [> >] Kjeldsen, H. [> >] McAlister, H. A. [> >] Metcalfe, T. S. [> >] Monteiro, M.J.P.F.G. [> >] Santos, N. C. [> >] Sousa, S. [> >] Sturmann, J. [> >] Sturmann, L. [> >] Ten Brummelaar, T. N. [> >] Turner, N. [> >] Vauclair, S. [> >] Publication date : Feb-2011 Journal title : Astronomy and Astrophysics Publisher : EDP Sciences Volume : 526 Pages : L4 Audience : International ISSN : 0004-6361 e-ISSN : 1432-0746 City : Les Ulis Country : France Keywords : [en] stars: individual: 18 Sco ; stars: oscillations ; techniques: radial velocities ; techniques: interferometric ; methods: data analysisAbstract : [en] The growing interest in solar twins is motivated by the possibility of comparing them directly to the Sun. To carry on this kind of analysis, we need to know their physical characteristics with precision. Our first objective is to use asteroseismology and interferometry on the brightest of them: 18 Sco. We observed the star during 12 nights with HARPS for seismology and used the PAVO beam-combiner at CHARA for interferometry. An average large frequency separation 134.4 ± 0.3 μHz and angular and linear radiuses of 0.6759 ± 0.0062 mas and 1.010 ± 0.009 Rsun were estimated. We used these values to derive the mass of the star, 1.02 ± 0.03 Msun.Permalink : http://hdl.handle.net/2268/109064 
[Université de Toulouse > Laboratoire Astrophysique de Toulouse - Tarbes > > >]
