SIMBAD references

2010A&A...520A..66B - Astronomy and Astrophysics, volume 520, A66-66 (2010/9-2)

Transiting exoplanets from the CoRoT space mission. XI. CoRoT-8b: a hot and dense sub-Saturn around a K1 dwarf.

BORDE P., BOUCHY F., DELEUIL M., CABRERA J., JORDA L., LOVIS C., CSIZMADIA S., AIGRAIN S., ALMENARA J.M., ALONSO R., AUVERGNE M., BAGLIN A., BARGE P., BENZ W., BONOMO A.S., BRUNTT H., CARONE L., CARPANO S., DEEG H., DVORAK R., ERIKSON A., FERRAZ-MELLO S., FRIDLUND M., GANDOLFI D., GAZZANO J.-C., GILLON M., GUENTHER E., GUILLOT T., GUTERMAN P., HATZES A., HAVEL M., HEBRARD G., LAMMER H., LEGER A., MAYOR M., MAZEH T., MOUTOU C., PAETZOLD M., PEPE F., OLLIVIER M., QUELOZ D., RAUER H., ROUAN D., SAMUEL B., SANTERNE A., SCHNEIDER J., TINGLEY B., UDRY S., WEINGRILL J. and WUCHTERL G.

Abstract (from CDS):

We report the discovery of CoRoT-8b, a dense small Saturn-class exoplanet that orbits a K1 dwarf in 6.2 days, and we derive its orbital parameters, mass, and radius. We analyzed two complementary data sets: the photometric transit curve of CoRoT-8b as measured by CoRoT and the radial velocity curve of CoRoT-8 as measured by the HARPS spectrometer. We find that CoRoT-8b is on a circular orbit with a semi-major axis of 0.063±0.001AU. It has a radius of 0.57±0.02RJ, a mass of 0.22±0.03MJ, and therefore a mean density of 1.6±0.1g/cm3. With 67% of the size of Saturn and 72% of its mass, CoRoT-8b has a density comparable to that of Neptune (1.76g/cm3). We estimate its content in heavy elements to be 47-63M⊕, and the mass of its hydrogen-helium envelope to be 7-23M⊕. At 0.063AU, the thermal loss of hydrogen of CoRoT-8b should be no more than ∼0.1% over an assumed integrated lifetime of 3Ga.

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Journal keyword(s): planets and satellites: detection - stars: fundamental parameters - techniques: photometric - techniques: spectroscopic - techniques: radial velocities - planets and satellites: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+A/520/A66): lc_white.dat lc_blue.dat lc_green.dat lc_red.dat rv.dat>

Simbad objects: 12

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