M
Matthieu Castro
Researcher at Federal University of Rio Grande do Norte
Publications - 43
Citations - 1078
Matthieu Castro is an academic researcher from Federal University of Rio Grande do Norte. The author has contributed to research in topics: Stars & Metallicity. The author has an hindex of 17, co-authored 42 publications receiving 1000 citations. Previous affiliations of Matthieu Castro include Paul Sabatier University.
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Journal ArticleDOI
The radius and mass of the close solar twin 18 Scorpii derived from asteroseismology and interferometry
Michael Bazot,Michael J. Ireland,Daniel Huber,Timothy R. Bedding,A.-M. Broomhall,Tiago L. Campante,Tiago L. Campante,Hervé Carfantan,William J. Chaplin,Yvonne Elsworth,Jorge Melendez,Jorge Melendez,Pascal Petit,S. Théado,Valérie Van Grootel,Torben Arentoft,Martin Asplund,Matthieu Castro,Jørgen Christensen-Dalsgaard,J. D. do Nascimento,B. Dintrans,Xavier Dumusque,Hans Kjeldsen,Harold A. McAlister,Travis S. Metcalfe,Mário J. P. F. G. Monteiro,Nuno C. Santos,Sérgio F. Sousa,Judit Sturmann,L. Sturmann,T. ten Brummelaar,Nils H. Turner,Sylvie Vauclair +32 more
TL;DR: In this paper, the authors used HARPS for seismology and used the PAVO beam-combiner at CHARA for interferometry on the star 18 Sco to compare the solar twins directly to the Sun.
Journal ArticleDOI
High precision abundances of the old solar twin HIP 102152: Insights on Li depletion from the oldest sun
TalaWanda R. Monroe,Jorge Melendez,Ivan Ramirez,David Yong,Maria Bergemann,Martin Asplund,Megan Bedell,Marcelo Tucci Maia,Jacob L. Bean,Karin Lind,Alan Alves-Brito,Luca Casagrande,Matthieu Castro,José Dias do Nascimento,Michael Bazot,Fabrício C. Freitas +15 more
TL;DR: In this paper, the first detailed chemical abundance analysis of the old 8.2?Gyr solar twin, HIP 102152, was presented, with precisions as high as 0.004 dex (1%), using ultra high-resolution (R = 110,000), high S/N UVES spectra obtained on the 8. 2?m Very Large Telescope.
Journal ArticleDOI
Low abundances of heavy elements in the solar outer layers: comparisons of solar models with helioseismic inversions
TL;DR: In this paper, an undermetallic accretion at the beginning of the main sequence was used to obtain a good agreement between helioseismic inversions and solar models that present the old mixture in the interior and new chemical composition in the convective zone.
Journal ArticleDOI
Age and mass of solar twins constrained by lithium abundance
J. D. do Nascimento,Matthieu Castro,Jorge Melendez,Michael Bazot,S. Theado,G. F. Porto de Mello,J. R. De Medeiros +6 more
TL;DR: In this paper, a grid of evolutionary models with non-standard mixing at several metallicities with the Toulouse-Geneva code was computed for a range of stellar masses assuming an error bar of ±50 K in Teff.
Journal ArticleDOI
18 Sco: A SOLAR TWIN RICH IN REFRACTORY AND NEUTRON-CAPTURE ELEMENTS. IMPLICATIONS FOR CHEMICAL TAGGING*
Jorge Melendez,Ivan Ramirez,Amanda I. Karakas,David Yong,TalaWanda R. Monroe,Megan Bedell,Maria Bergemann,Martin Asplund,Marcelo Tucci Maia,Jacob L. Bean,José Dias do Nascimento,José Dias do Nascimento,Michael Bazot,Alan Alves-Brito,Fabrício C. Freitas,Matthieu Castro +15 more
TL;DR: In this article, the chemical composition and stellar parameters of the solar twin 18 Sco in a strictly differential sense relative to the Sun were studied using high-resolution (R ∼ 110,000), high signal-to-noise ratio (800-1,000) Very Large Telescope UVES spectra.