Fulltext

Volatiles and refratories in solar analogs: No terrestial planet connection

González Hernández, Jonay I. ; Israelian, Garik ; Santos, Nuno C. ; Sousa, Sergio ; Delgado-Mena, Elisa ; Neves, Vasco ; Udry, Stéphane

In: Proceedings of the International Astronomical Union, 2010, vol. 6, no. S276, p. 422-423

Add to personal list
    Title
    • Volatiles and refratories in solar analogs: No terrestial planet connection
    Author
    • González Hernández, Jonay I.. Instituto de Astrofísica de Canarias, C/ Via Láctea s/n, 38200 La Laguna, Spain email: jonay@iac.es
    • Israelian, Garik. Instituto de Astrofísica de Canarias, C/ Via Láctea s/n, 38200 La Laguna, Spain email: jonay@iac.es
    • Santos, Nuno C.. Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
    • Sousa, Sergio. Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
    • Delgado-Mena, Elisa. Instituto de Astrofísica de Canarias, C/ Via Láctea s/n, 38200 La Laguna, Spain email: jonay@iac.es
    • Neves, Vasco. Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
    • Udry, Stéphane. Observatoire Astronomique de l'Université de Genève, 51 Ch. des Maillettes, -Sauverny- Ch1290, Versoix, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Proceedings of the International Astronomical Union, 2010, vol. 6, no. S276, p. 422-423. Cambridge University Press
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:299613
    Summary
    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 ~ 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