Abstract
The CoRoT exoplanet science team announces the discovery of CoRoT-11b, a
fairly massive hot-Jupiter transiting a V = 12.9 mag F6 dwarf star (M_*
= 1.27±0.05 M⊙, R_* = 1.37±0.03
R⊙, Teff = 6440±120 K), with an orbital
period of P = 2.994329±0.000011 days and semi-major axis a =
0.0436±0.005 AU. The detection of part of the radial velocity
anomaly caused by the Rossiter-McLaughlin effect shows that the
transit-like events detected by CoRoT are caused by a planet-sized
transiting object in a prograde orbit. The relatively high projected
rotational velocity of the star (v sin i = 40±5 km
s-1) places CoRoT-11 among the most rapidly rotating planet
host stars discovered so far. With a planetary mass of Mp =
2.33±0.34 MJup and radius Rp
=1.43±0.03 RJup, the resulting mean density of
CoRoT-11b (ρp = 0.99±0.15 g/cm3) can be
explained with a model for an inflated hydrogen-planet with a solar
composition and a high level of energy dissipation in its interior.
The CoRoT space mission, launched on 2006 December 27, has been
developed and is operated by CNES, with the contribution of Austria,
Belgium, Brazil, ESA (RSSD and Science Programme), Germany and Spain.
Original language | English |
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Journal | Astronomy and Astrophysics |
Volume | 524 |
Early online date | 23 Nov 2010 |
DOIs | |
Publication status | Published - 01 Dec 2010 |
Externally published | Yes |
Keywords
- planetary systems
- techniques: photometric
- techniques: radial velocities
- techniques: spectroscopic