2014A&A...569A..74B


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.30CEST18:58:35

2014A&A...569A..74B - Astronomy and Astrophysics, volume 569A, 74-74 (2014/9-1)

Revisiting the transits of CoRoT-7b at a lower activity level.

BARROS S.C.C., ALMENARA J.M., DELEUIL M., DIAZ R.F., CSIZMADIA Sz., CABRERA J., CHAINTREUIL S., COLLIER CAMERON A., HATZES A., HAYWOOD R., LANZA A.F., AIGRAIN S., ALONSO R., BORDE P., BOUCHY F., DEEG H.J., ERIKSON A., FRIDLUND M., GRZIWA S., GANDOLFI D., GUILLOT T., GUENTHER E., LEGER A., MOUTOU C., OLLIVIER M., PASTERNACKI T., PAETZOLD M., RAUER H., ROUAN D., SANTERNE A., SCHNEIDER J. and WUCHTERL G.

Abstract (from CDS):

The first super-Earth with measured radius discovered was CoRoT-7b and it has opened the new field of rocky exoplanet characterisation. To better understand this interesting system, new observations were taken with the CoRoT satellite. During this run 90 new transits were obtained in the imagette mode. These were analysed together with the previous 151 transits obtained in the discovery run and HARPS radial velocity observations to derive accurate system parameters. A difference is found in the posterior probability distribution of the transit parameters between the previous CoRoT run (LRa01) and the new run (LRa06). We propose that this is due to an extra noise component in the previous CoRoT run suspected of being transit spot occultation events. These lead to the mean transit shape becoming V-shaped. We show that the extra noise component is dominant at low stellar flux levels and reject these transits in the final analysis. We obtained a planetary radius, Rp=1.585±0.064R, in agreement with previous estimates. Combining the planetary radius with the new mass estimates results in a planetary density of 1.19 ±0.27ρ which is consistent with a rocky composition. The CoRoT-7 system remains an excellent test bed for the effects of activity in the derivation of planetary parameters in the shallow transit regime.

Abstract Copyright:

Journal keyword(s): stars: individual: CoRoT -7b - planetary systems - stars: activity - techniques: photometric - methods: observational

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 CoRoT-7 * 06 43 49.4690410679 -01 03 46.825797768   12.78 11.73 11.36 10.87 K0V 174 1
2 CoRoT-7b Pl 06 43 49.4690410679 -01 03 46.825797768           ~ 350 1
3 CoRoT-7d Pl? 06 43 49.4690410679 -01 03 46.825797768           ~ 12 1
4 CoRoT-7c Pl 06 43 49.4690410679 -01 03 46.825797768           ~ 40 1
5 CoRoT-8b Pl 19 26 21.2426686221 +01 25 35.178176730           ~ 43 1
6 CoRoT-2b Pl 19 27 06.4944821296 +01 23 01.357597206           ~ 182 1
7 Kepler-17b Pl 19 53 34.8642919207 +47 48 54.049941399           ~ 75 1
8 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1491 1
9 WASP-10b Pl 23 15 58.3005497925 +31 27 46.294728182           ~ 92 1

    Equat.    Gal    SGal    Ecl

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2020.09.30-18:58:35

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