These results were presented this week at the IAU symposium 253 in Massachusetts, USA.
COROT has now been operating for 510 days, and the mission started observations of its sixth star field at the beginning of May this year. During this observation phase, which will last 5 months, the spacecraft will simultaneously observe 12 000 stars.
The two new planets are gas giants of the hot Jupiter type, which orbit very close to their parent star and tend to have extensive atmospheres because heat from the nearby star gives them energy to expand.
In addition, an oddity dubbed ‘COROT-exo-3b’ has raised particular interest among astronomers. It appears to be something between a brown dwarf, a sub-stellar object without nuclear fusion at its core but with some stellar characteristics, and a planet. Its radius is too small for it to be a super-planet.
If it is a star, it would be among the smallest ever detected. Follow-up observations from the ground have pinned it at 20 Jupiter massses. This makes it twice as dense as the metal Platinum.
Scientists suspect that with the detection of COROT-exo-3b, they might just have discovered the missing link between stars and planets.
COROT has also detected extremely faint signals that, if confirmed, could indicate the existence of another exoplanet, with a radius as small as 1.7 times that of Earth.
This is an encouraging sign in the delicate and difficult search for small, rocky exoplanets that COROT has been designed for.
Malcolm Fridlund | alfa
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