Volatiles and refratories in solar analogs: No terrestial planet connection

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2011

Autores

Hernandez, JIG (Autor) Outra; Israelian, G (Autor) Outra; N.C. Santos (Autor) FCUP; Sousa, SG (Autor) FCUP; Delgado Mena, E (Autor) Outra; Neves, V (Autor) Outra; Udry, S (Autor) Outra

Ata de Conferência Internacional

Título: ASTROPHYSICS OF PLANETARY SYSTEMS: FORMATION, STRUCTURE, AND DYNAMICAL EVOLUTION

Páginas: 422-423

276th Symposium of the International-Astronomical-Union on Astrophysics of Planetary Systems: Formation, Structure, and Dynamical Evolution

Torino, ITALY, OCT 10-15, 2010

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-005-70N

DOI: 10.1017/s174392131102062x

Abstract (EN): We have analysed very high-quality HARPS and UVES spectra of 95 solar analogs, 24 hosting planets and 71 without detected planets; to search for any possible signature of terrestial planets in the chemical abundances of volatile and refractory elements with respect to the solar abundances. We demonstrate that stars with and without planets in this sample show similar mean abundance ratios, in particular, a sub-sample of 14 planet-host and 14 "single" solar analogs in the metallicity range 0.14 < [Fe/H] < 0.36. In addition, two of the planetary systems in this sub-sample, containing each of them a super-Earth-like planet with masses in the range similar to 7 - 11 Earth masses, have different volatile-to-refratory abundance ratios to what would be expected from the presence of a terrestial planets. Finally, we check that after removing the Galactic chemical evolution effects any possible difference in mean abundances, with respect to solar values, of refratory and volatile elements practically dissappears.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 2