Bibcode
Ecuvillon, Alexandra; Israelian, Garik; Pont, F.; Santos, Nuno Cardoso; Mayor, Michel
Referencia bibliográfica
"JENAM-2007, "Our non-stable Universe", held 20-25 August 2007 in Yerevan, Armenia. Abstract book, p. 7-7"
Advertised on:
8
2007
Número de citas
0
Número de citas referidas
0
Descripción
We present a detailed study on the kinematics of metal-rich stars with
and without planets, and their relation with the Hyades, Sirius and
Hercules dynamical streams in the solar neighbourhood. We compare the
kinematic behaviour of known planet-host stars to the remaining targets
belonging to the CORALIE volume-limited sample, in particular to its
metal-rich population. The high average metallicity of the Hyades stream
is confirmed. The planet-host targets show a kinematic behaviour similar
to that of the metal-rich comparison subsample, rather than to that of
the comparison sample as a whole, thus supporting a primordial origin
for the metal excess observed in stars with known planetary companions.
According to the scenarios proposed as an explanation for the dynamical
streams, systems with giant planets could have formed more easily in
metal-rich inner Galactic regions.