Bibcode
González-Hernández, J. I.; Israelian, G.; Santos, N. C.; Sousa, S.; Delgado-Mena, E.; Neves, V.; Udry, S.
Bibliographical reference
Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held in Madrid, September 13 - 17, 2010, Eds.: M. R. Zapatero Osorio, J. Gorgas, J. Maíz Apellániz, J. R. Pardo, and A. Gil de Paz., p. 576-582
Advertised on:
11
2011
Citations
3
Refereed citations
2
Description
We present the detailed chemical abundance patterns of 95 solar analogs,
24 hosting planets and 71 without detected planets, using very
high-quality HARPS and UVES spectra. We explore the possibility that the
presence of terrestial planets could affect the volatile-to-refratory
abundance ratios. We do not see any clear difference between the stars
with and without planets, either in solar twins or in the whole sample
of solar analogs. We also select a sub-sample of 28 solar analogs, 14
with and 14 without planets, in the metallicity range 0.14<
[Fe/H]}<0.36 and find the same abundance pattern for both star with
and without planets. In particular, two of the planetary systems, which
contain each of them a Super-Earth like planet, show abundance patterns
not consistent with the presence of terrestial planets. We demonstrate
that the Galactic chemical evolution effects are probably responsible
for any possible difference in mean abundances of refratory and volatile
elements in these solar analogs with respect to the solar values.