2011A&A...527A..20G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST06:53:43

2011A&A...527A..20G - Astronomy and Astrophysics, volume 527A, 20-20 (2011/3-1)

An analysis of the CoRoT-2 system: a young spotted star and its inflated giant planet.

GUILLOT T. and HAVEL M.

Abstract (from CDS):

CoRoT-2b is one of the most anomalously large exoplanet known. Given its high mass, its large radius cannot be explained by standard evolution models. Interestingly, the planet's parent star is an active, rapidly rotating solar-like star with with spots covering a large fraction (7-20%) of its visible surface. We attempt to constrain the properties of the star-planet system and understand whether the planet's inferred large size may be caused a systematic error in the inferred parameters, and if not, how it can be explained. We combine stellar and planetary evolution codes based on all available spectroscopic and photometric data to obtain self-consistent constraints on the system parameters. We find no systematic error in the stellar modeling (including spots and stellar activity) that would cause a ∼10% reduction in size of the star and thus the planet. Two classes of solutions are found: the usual main-sequence solution for the star yields for the planet a mass of 3.67±0.13MJ, a radius of 1.55±0.03RJ for an age that is at least 130Ma and should be younger than 500 Ma given the star's rapid rotation and significant activity. We identify another class of solutions on the pre-main sequence, for which the planet's mass is 3.45±0.27MJ and its radius is 1.50±0.06RJ for an age of 30 to 40Ma. These extremely young solutions provide the simplest explanation of the planet's size that can then be matched by a simple contraction from an initially hot, expanded state, if the atmospheric opacities are larger by a factor of ∼3 than usually assumed for solar composition atmospheres. Other solutions imply that the present inflated radius of CoRoT-2b is transient and the result of an event that occurred less than 20Ma ago, i.e., a giant impact with another Jupiter-mass planet, or interactions with another object in the system that caused a significant rise in the eccentricity followed by the rapid circularization of its orbit. Additional observations of CoRoT-2 that could help us to understand this system include searches for an infrared excess, a debris disk, and additional companions. The determination of a complete infrared lightcurve including both the primary and secondary transits would also be extremely valuable to constrain the planet's atmospheric properties and determine the planet-to-star radius ratio in a manner less vulnerable to systematic errors caused by stellar activity.

Abstract Copyright:

Journal keyword(s): stars: individual: CoRoT-2 - planetary systems - planets and satellites: physical evolution - stars: pre-main sequence

Simbad objects: 51

goto Full paper

goto View the reference in ADS

Number of rows : 51

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 WASP-1 V* 00 20 40.0746033057 +31 59 23.953709844   12.06 11.31     F7V 105 1
2 HD 17156 PM* 02 49 44.4866941172 +71 45 11.632197644   8.78 8.16     G0 145 2
3 WASP-11 ** 03 09 28.5427034552 +30 40 24.868785834   12.58 11.57 11.42   K3V 69 1
4 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2979 0
5 BD+57 793 * 04 21 52.7044170433 +57 49 01.892074012   10.27 9.85     F5V 130 2
6 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2654 0
7 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 534 1
8 WASP-12 ** 06 30 32.7966788910 +29 40 20.266334158   12.14 11.57     G0V 229 2
9 CoRoT-5 EB* 06 45 06.5406880497 +00 48 54.906888317   14.67 14.018 13.82 13.29 F9V 35 1
10 CoRoT-1 * 06 48 19.1724141241 -03 06 07.710423478     13.6 13.44 12.88 G0V 106 2
11 CoRoT-1b Pl 06 48 19.1724141241 -03 06 07.710423478           ~ 150 1
12 CoRoT-4 * 06 48 46.7133639143 -00 40 21.969520601       13.42   F0V 57 1
13 HAT-P-9 * 07 20 40.4562402899 +37 08 26.342807726   12.35 12.34 12.08   F 44 1
14 XO-4 * 07 21 33.1602110129 +58 16 05.111704885   11.15 10.81     ~ 51 1
15 XO-5 * 07 46 51.9615004947 +39 05 40.460564688     12.1 11.95   G8V 39 1
16 BD+50 1471 PM* 07 48 06.4726006390 +50 13 32.921121328   12.002 11.138 10.669 10.243 G9V 140 1
17 OGLE-TR 211 * 10 40 14.3825488221 -62 27 20.019051097       15.24   ~ 33 1
18 OGLE-TR 132 V* 10 50 34.5945727713 -61 57 26.140283621         15.72 F 94 1
19 OGLE-TR 113 SB* 10 52 24.2808297652 -61 26 48.845891762     16.08 15.41 14.42 K 112 1
20 OGLE-TR 111 V* 10 53 17.8066842748 -61 24 20.606379347     16.96 16.05 15.55 G 90 1
21 OGLE-TR 182 * 11 09 18.7248184151 -61 05 42.963716098     16.84 16.37   ~ 33 1
22 HAT-P-3 * 13 44 22.5939154049 +48 01 43.206257583   12.53 11.86     ~ 68 1
23 BD+22 2716 * 14 33 06.3573673505 +21 53 40.982782397   10.194 9.745     F5V 80 1
24 BD+36 2593 * 15 19 57.9205371377 +36 13 46.737977732   11.83 11.12     F 83 1
25 BD+28 2507 V* 16 02 11.8463105423 +28 10 10.419642379   11.88 11.25     G1V 91 1
26 HD 147506 * 16 20 36.3579144486 +41 02 53.109043943   9.15 8.69     F8V 139 2
27 HD 149026 PM* 16 30 29.6184841164 +38 20 50.310893575   8.75 8.14     G0IV 195 1
28 OGLE-TR 10 EB* 17 51 28.2589927588 -29 52 35.232998832     15.780 16.193 14.92 G2V 84 1
29 TrES-3 Pl 17 52 07.0185036683 +37 32 46.237002085           ~ 192 2
30 TrES-4 Pl 17 53 13.0490781575 +37 12 42.586106196           ~ 180 2
31 OGLE-TR 56 EB* 17 56 35.5015759807 -29 32 21.476706712     16.560 16.07 15.30 ~ 158 1
32 HAT-P-5 * 18 17 37.3127577964 +36 37 17.168584830   12.92 11.95     G1V 52 1
33 BD+35 3293 V* 18 34 31.6255913635 +35 39 41.489193276   11.07 10.63 10.52   F7V 108 1
34 NAME V672 Lyr b Pl 19 04 09.8516024106 +36 37 57.445911611           ~ 310 1
35 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 280 2
36 CoRoT-2 * 19 27 06.4944821296 +01 23 01.357597206   13.422 12.568 12.204 11.49 G7V+K9V 211 2
37 CoRoT-2b Pl 19 27 06.4944821296 +01 23 01.357597206           ~ 178 1
38 CoRoT-3 EB* 19 28 13.2642482783 +00 07 18.614302248   14.199 13.292 13.099 12.54 F3V 66 1
39 BD+47 2846 Er* 19 28 59.3538131541 +47 58 10.216250846   10.97 10.48     F6V 254 2
40 HD 189733 BY* 20 00 43.7130382888 +22 42 39.071811263 9.241 8.578 7.648 7.126 6.68 K2V 720 1
41 WASP-2 ** 20 30 54.1279218812 +06 25 46.338261893   13 11.98     K1.5+M1V-M4V 117 2
42 HD 197286 PM* 20 44 10.2207500229 -39 13 30.859306335   9.98 9.50     F5V 62 1
43 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1468 1
44 HD 209458 V* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 994 1
45 BD+34 4779b Pl 22 52 09.8635559135 +35 26 49.606963112           ~ 63 1
46 BD+34 4779 PM* 22 52 09.8635559135 +35 26 49.606963112   10.77 10.36 10.15   F8V 64 1
47 BD+37 4734B PM* 22 57 46.8443014981 +38 40 30.355384717   10.82 9.87     G0V 143 1
48 WASP-10 V* 23 15 58.3005497925 +31 27 46.294728182   12.4   12.03   K5V 74 1
49 WASP-4 PM* 23 34 15.0858223039 -42 03 41.049468209   13.51 12.48 11.9   G7V 128 1
50 BD+41 4831 * 23 39 05.8101319829 +42 27 57.503480354   10.88 10.47     F8V 70 1
51 WASP-5 V* 23 57 23.7565609528 -41 16 37.745589460   12.71 12.3 11.82 11.44 G4V 89 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2011A&A...527A..20G and select 'bookmark this link' or equivalent in the popup menu


2020.07.13-06:53:43

© Université de Strasbourg/CNRS

    • Contact