2008A&A...482L..21A


Query : 2008A&A...482L..21A

2008A&A...482L..21A - Astronomy and Astrophysics, volume 482, L21-24 (2008/5-2)

Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star.

ALONSO R., AUVERGNE M., BAGLIN A., OLLIVIER M., MOUTOU C., ROUAN D., DEEG H.J., AIGRAIN S., ALMENARA J.-M., BARBIERI M., BARGE P., BENZ W., BORDE P., BOUCHY F., DE LA REZA R., DELEUIL M., DVORAK R., ERIKSON A., FRIDLUND M., GILLON M., GONDOIN P., GUILLOT T., HATZES A., HEBRARD G., KABATH P., JORDA L., LAMMER H., LEGER A., LLEBARIA A., LOEILLET B., MAGAIN P., MAYOR M., MAZEH T., PAETZOLD M., PEPE F., PONT F., QUELOZ D., RAUER H., SHPORER A., SCHNEIDER J., STECKLUM B., UDRY S. and WUCHTERL G.

Abstract (from CDS):

The CoRoT mission, a pioneer in exoplanet searches from space, has completed its first 150 days of continuous observations of ∼12000 stars in the galactic plane. An analysis of the raw data identifies the most promising candidates and triggers the ground-based follow-up. We report on the discovery of the transiting planet CoRoT-Exo-2b, with a period of 1.743 days, and characterize its main parameters. We filter the CoRoT raw light curve of cosmic impacts, orbital residuals, and low frequency signals from the star. The folded light curve of 78 transits is fitted to a model to obt.ain the main parameters. Radial velocity data obtained with the SOPHIE, CORALIE and HARPS spectrographs are combined to characterize the system. The 2.5-min binned phase-folded light curve is affected by the effect of sucessive occultations of stellar active regions by the planet, and the dispersion in the out of transit part reaches a level of 1.09x10–4 in flux units. We derive a radius for the planet of 1.465±0.029RJupand a mass of 3.31±0.16MJup, corresponding to a density of 1.31±0.04g/cm3. The large radius of CoRoT-Exo-2b cannot be explained by current models of evolution of irradiated planets.

Abstract Copyright:

Journal keyword(s): stars: planetary systems - techniques: photometric - techniques: radial velocity

Nomenclature: CoRoT-N (No. 2), CoRoT-Na (No. 2b).

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 CoRoT-1b Pl 06 48 19.1724141241 -03 06 07.710423478           ~ 166 1
2 NAME OGLE-TR-56b Pl 17 56 35.5015759807 -29 32 21.476706712           ~ 197 1
3 V* V672 Lyr V* 19 04 09.8515616256 +36 37 57.446680296   12.35 11.42     K0V 104 1
4 NAME V672 Lyr b Pl 19 04 09.8516024106 +36 37 57.445911611           ~ 321 1
5 CoRoT-2 * 19 27 06.4944378024 +01 23 01.359897468   13.422 12.568 12.204 11.49 G7V+K9V 231 2
6 CoRoT-2b Pl 19 27 06.4944821296 +01 23 01.357597206           ~ 216 1
7 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 816 1

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2022.10.02-01:29:58

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