2009A&A...506..287L


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET20:15:35

2009A&A...506..287L - Astronomy and Astrophysics, volume 506, 287-302 (2009/10-4)

Transiting exoplanets from the CoRoT space mission. VIII. CoRoT-7b: the first super-earth with measured radius.

LEGER A., ROUAN D., SCHNEIDER J., BARGE P., FRIDLUND M., SAMUEL B., OLLIVIER M., GUENTHER E., DELEUIL M., DEEG H.J., AUVERGNE M., ALONSO R., AIGRAIN S., ALAPINI A., ALMENARA J.M., BAGLIN A., BARBIERI M., BRUNTT H., BORDE P., BOUCHY F., CABRERA J., CATALA C., CARONE L., CARPANO S., CSIZMADIA Sz., DVORAK R., ERIKSON A., FERRAZ-MELLO S., FOING B., FRESSIN F., GANDOLFI D., GILLON M., GONDOIN P., GRASSET O., GUILLOT T., HATZES A., HEBRARD G., JORDA L., LAMMER H., LLEBARIA A., LOEILLET B., MAYOR M., MAZEH T., MOUTOU C., PAETZOLD M., PONT F., QUELOZ D., RAUER H., RENNER S., SAMADI R., SHPORER A., SOTIN C., TINGLEY B., WUCHTERL G., ADDA M., AGOGUE P., APPOURCHAUX T., BALLANS H., BARON P., BEAUFORT T., BELLENGER R., BERLIN R., BERNARDI P., BLOUIN D., BAUDIN F., BODIN P., BOISNARD L., BOIT L., BONNEAU F., BORZEIX S., BRIET R., BUEY J.-T., BUTLER B., CAILLEAU D., CAUTAIN R., CHABAUD P.-Y., CHAINTREUIL S., CHIAVASSA F., COSTES V., CUNHA PARRO V., DE OLIVEIRA FIALHO F., DECAUDIN M., DEFISE J.-M., DJALAL S., EPSTEIN G., EXIL G.-E., FAURE C., FENOUILLET T., GABORIAUD A., GALLIC A., GAMET P., GAVALDA P., GROLLEAU E., GRUNEISEN R., GUEGUEN L., GUIS V., GUIVARC'H V., GUTERMAN P., HALLOUARD D., HASIBA J., HEURIPEAU F., HUNTZINGER G., HUSTAIX H., IMAD C., IMBERT C., JOHLANDER B., JOURET M., JOURNOUD P., KARIOTY F., KERJEAN L., LAFAILLE V., LAFOND L., LAM-TRONG T., LANDIECH P., LAPEYRERE V., LARQUE T., LAUDET P., LAUTIER N., LECANN H., LEFEVRE L., LERUYET B., LEVACHER P., MAGNAN A., MAZY E., MERTENS F., MESNAGER J.-M., MEUNIER J.-C., MICHEL J.-P., MONJOIN W., NAUDET D., NGUYEN-KIM K., ORCESI J.-L., OTTACHER H., PEREZ R., PETER G., PLASSON P., PLESSERIA J.-Y., PONTET B., PRADINES A., QUENTIN C., REYNAUD J.-L., ROLLAND G., ROLLENHAGEN F., ROMAGNAN R., RUSS N., SCHMIDT R., SCHWARTZ N., SEBBAG I., SEDES G., SMIT H., STELLER M.B., SUNTER W., SURACE C., TELLO M., TIPHENE D., TOULOUSE P., ULMER B., VANDERMARCQ O., VERGNAULT E., VUILLEMIN A. and ZANATTA P.

Abstract (from CDS):

We report the discovery of very shallow (ΔF/F≃3.4x10–4), periodic dips in the light curve of an active V=11.7 G9V star observed by the CoRoT satellite, which we interpret as caused by a transiting companion. We describe the 3-colour CoRoT data and complementary ground-based observations that support the planetary nature of the companion. We used CoRoT colours information, good angular resolution ground-based photometric observations in- and out- of transit, adaptive optics imaging, near-infrared spectroscopy, and preliminary results from radial velocity measurements, to test the diluted eclipsing binary scenarios. The parameters of the host star were derived from optical spectra, which were then combined with the CoRoT light curve to derive parameters of the companion. We examined all conceivable cases of false positives carefully, and all the tests support the planetary hypothesis. Blends with separation >0.40"or triple systems are almost excluded with a 8x10–4 risk left. We conclude that, inasmuch we have been exhaustive, we have discovered a planetary companion, named CoRoT-7b, for which we derive a period of 0.853 59±3x10–5-day and a radius of Rp=1.68 ±0.09R. Analysis of preliminary radial velocity data yields an upper limit of 21M for the companion mass, supporting the finding. CoRoT-7b is very likely the first Super-Earth with a measured radius. This object illustrates what will probably become a common situation with missions such as Kepler, namely the need to establish the planetary origin of transits in the absence of a firm radial velocity detection and mass measurement. The composition of CoRoT-7b remains loosely constrained without a precise mass. A very high surface temperature on its irradiated face, ≃1800-2600K at the substellar point, and a very low one, ≃50K, on its dark face assuming no atmosphere, have been derived.

Abstract Copyright:

Journal keyword(s): techniques: photometric - techniques: spectroscopic - planetary systems - techniques: high angular resolution - techniques: radial velocities

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2740 0
2 HD 48497 V* 06 43 36.0863978671 -01 20 48.433759958   7.40 7.51     B5V 15 1
3 CoRoT-7b Pl 06 43 49.4690410679 -01 03 46.825797768           ~ 364 1
4 CoRoT-7 * 06 43 49.4690410679 -01 03 46.825797768   12.78 11.73 11.36 10.87 K0V 176 1
5 V* YY Gem BY* 07 34 37.4475372002 +31 52 10.181030942 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 826 0
6 Ross 905 PM* 11 42 11.0933874353 +26 42 23.658083337   12.06 10.613 10.272 8.24 M3V 518 1
7 NAME OGLE-TR-56b Pl 17 56 35.5015759807 -29 32 21.476706712           ~ 195 1
8 CoRoT-2b Pl 19 27 06.4944821296 +01 23 01.357597206           ~ 192 1

    Equat.    Gal    SGal    Ecl

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