Volatiles and refratories in solar analogs: No terrestial planet connection

• Type: Article in International Conference Proceedings Book
• Date: 2011

Authors

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

Conference proceedings International

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

Pages: 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

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 1 Citation

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 2