2010A&A...512A..77L


Query : 2010A&A...512A..77L

2010A&A...512A..77L - Astronomy and Astrophysics, volume 512, A77-77 (2010/3-1)

Hot Jupiters and the evolution of stellar angular momentum.

LANZA A.F.

Abstract (from CDS):

Giant planets orbiting main-sequence stars closer than 0.1 AU are called hot Jupiters. They interact with their stars affecting their angular momentum. Recent observations provide evidence of excess angular momentum in stars with hot Jupiters in comparison to stars with distant and less massive planets. This has been attributed to tidal interaction, but needs to be investigated in more detail considering other possible explanations because in several cases the tidal synchronization timescales are much longer than the ages of the stars. We select stars harbouring transiting hot Jupiters to study their rotation and find that those with an effective temperature Teff>6000K and a rotation period Prot≲10days are synchronized with the orbital motion of their planets or have a rotation period approximately twice that of the planetary orbital period. Stars with Teff≲6000K or Prot>10days show a general trend toward synchronization with increasing effective temperature or decreasing orbital period. We propose a model for the angular momentum evolution of stars with hot Jupiters to interpret these observations. It is based on the hypothesis that a close-in giant planet affects the coronal field of its host star leading to a topology with predominantly closed field lines. An analytic linear force-free model has been adopted to compute the radial extension of the corona and its angular momentum loss rate. The corona is more tightly confined in F-type stars and in G- and K-type stars with a rotation period shorter than ∼10 days. The angular momentum loss is produced by coronal eruptions similar to solar coronal mass ejections. The model predicts that F-type stars with hot Jupiters, Teff>6000K and an initial rotation period ≲10days suffer no or very little angular momentum loss during their main-sequence lifetime. This can explain their rotation as a remnant of their pre-main-sequence evolution. On the other hand, F-type stars with Prot>10days and G- and K-type stars experience a significant angular momentum loss during their main-sequence lifetime, but at a generally slower pace than similar stars without close-in massive planets. Considering a spread in their ages, this can explain the observed rotation period distribution of planet-harbouring stars.Our model can be tested observationally and has relevant consequences for the relationship between stellar rotation and close-in giant planets, as well as for the application of gyrochronology to estimate the age of planet-hosting stars.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: late-type - stars: rotation - stars: magnetic field - stars: coronae

Simbad objects: 63

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Number of rows : 63
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 WASP-1 V* 00 20 40.0745768856 +31 59 23.954809596   12.06 11.31     F7V 114 1
2 * ups And PM* 01 36 47.8415443907 +41 24 19.651368029 4.70 4.64 4.10 3.64 3.35 F9V 936 1
3 HD 10069 SB* 01 37 25.0332798696 -45 40 40.374717456   9.74 9.30     F6IV/V 201 1
4 HD 17156 PM* 02 49 44.4871034544 +71 45 11.629235988   8.78 8.16     F9V 163 2
5 WASP-11 ** 03 09 28.5433589520 +30 40 24.862993356   12.58 11.57 11.42   K3V 79 1
6 BD+57 793 * 04 21 52.7048156328 +57 49 01.889294952   10.27 9.85     F5V 145 2
7 WASP-12 ** 06 30 32.7966092352 +29 40 20.263502460   12.14 11.57     G0V 282 2
8 CoRoT-7 * 06 43 49.4690164104 -01 03 46.826642700   12.78 11.73 11.36 10.87 K0V 199 1
9 CoRoT-5 EB* 06 45 06.5406550272 +00 48 54.905787036   14.67 14.018 13.82 13.29 F9V 43 1
10 CoRoT-1 * 06 48 19.1723766840 -03 06 07.710745140     13.6 13.44 12.88 G0V 120 2
11 CoRoT-4 * 06 48 46.7134456728 -00 40 21.969631416       13.42   F0V 68 1
12 HAT-P-9 * 07 20 40.4564614032 +37 08 26.342829060   12.35 12.34 12.08   F 52 1
13 XO-4 * 07 21 33.1602434760 +58 16 05.109533364   11.15 10.81     ~ 59 1
14 XO-5 * 07 46 51.9614762400 +39 05 40.460854956     12.1 11.95   G8V 47 1
15 BD+50 1471 PM* 07 48 06.4723053776 +50 13 32.920598923   12.002 11.138 10.669 10.243 G9V 162 1
16 HAT-P-13 * 08 39 31.8072358440 +47 21 07.273799280   11.15 10.42 10.40   G4 128 2
17 BD+34 1976 V* 09 20 24.7145388600 +33 52 56.696039796   11.21 10.42     G1V 68 1
18 HD 80606 PM* 09 22 37.5768032712 +50 36 13.435326684   9.78 9.00     G8V 312 2
19 OGLE-TR 211 * 10 40 14.3828284632 -62 27 20.018236464       15.24   ~ 34 1
20 OGLE-TR 132 V* 10 50 34.5943868112 -61 57 26.138690064         15.72 F 96 1
21 OGLE-TR 113 SB* 10 52 24.2810533560 -61 26 48.845675976     16.08 15.41 14.42 K 116 1
22 OGLE-TR 111 V* 10 53 17.8069115424 -61 24 20.607791112     16.96 16.05 15.55 G 92 1
23 OGLE2-TR L9 * 11 07 55.1808382920 -61 08 46.537684260       14.60   F3 34 1
24 OGLE-TR 182 * 11 09 18.7248783144 -61 05 42.962710884     16.84 16.37   ~ 35 1
25 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 592 1
26 HAT-P-3 * 13 44 22.5937349736 +48 01 43.205733624   12.53 11.86     K1V 79 1
27 * tau Boo Ro* 13 47 15.7381720026 +17 27 24.809555600 5.02 4.98 4.49 4.09 3.85 F7IV-V 953 1
28 CD-31 10766 * 13 55 42.7120177608 -32 09 34.616222028   11.396 10.910     F7 68 1
29 HAT-P-12 PM* 13 57 33.4668726399 +43 29 36.601508739   12.6 12.84     K5 76 1
30 WASP-16 * 14 18 43.9225013904 -20 16 31.843626168   12.51 11.29 11.00 10.49 G3V 67 1
31 BD+22 2716 * 14 33 06.3571702344 +21 53 40.981395876   10.194 9.745     F5V 93 1
32 BD+36 2593 * 15 19 57.9203617176 +36 13 46.738078788   11.83 11.12     F 100 1
33 CD-27 10695 * 15 59 50.9491505016 -28 03 42.312819096   11.83 11.59 11.31 10.92 F4 110 1
34 BD+28 2507 V* 16 02 11.8462322592 +28 10 10.420201452   11.88 11.25     G1V 99 1
35 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 158 2
36 HD 149026 PM* 16 30 29.6185771608 +38 20 50.308980864   8.75 8.14     G0IV 219 1
37 OGLE-TR 10 EB* 17 51 28.2593510544 -29 52 35.231024064     15.780 16.193 14.92 G2V 89 1
38 TrES-3 Pl 17 52 07.0185036683 +37 32 46.237002085           ~ 218 2
39 TrES-4 Pl 17 53 13.0490781575 +37 12 42.586106196           ~ 197 2
40 OGLE-TR 56 EB* 17 56 35.5016678064 -29 32 21.479240220     16.560 16.07 15.30 ~ 166 1
41 HAT-P-5 * 18 17 37.3126923960 +36 37 17.170401468   12.92 11.95     G1V 61 1
42 BD+35 3293 V* 18 34 31.6252443960 +35 39 41.491899468   11.07 10.63 10.52   F7V 122 1
43 CoRoT-6 * 18 44 17.4078666144 +06 39 47.513042100   14.68 13.80 14.18   F5V 46 1
44 NAME V672 Lyr b Pl 19 04 09.8516024106 +36 37 57.445911611           ~ 325 1
45 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 313 2
46 HD 179949 BY* 19 15 33.2300695008 -24 10 45.671448072   6.772 6.237     F8V 389 1
47 CoRoT-2 * 19 27 06.4944378024 +01 23 01.359897468   13.422 12.568 12.204 11.49 G7V+K9V 239 2
48 CoRoT-3 EB* 19 28 13.2642131544 +00 07 18.613986132   14.199 13.292 13.099 12.54 F3V 75 1
49 BD+47 2846 Er* 19 28 59.3538826128 +47 58 10.217007804   10.97 10.48     F6V 289 2
50 BD+47 2936 EB* 19 50 50.2472976936 +48 04 51.101390496       8.8   K4V 269 2
51 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 834 1
52 HD 192263 BY* 20 13 59.8455790536 -00 52 00.769626768 9.447 8.724 7.767 7.231 6.771 K1/2V 232 1
53 WASP-2 V* 20 30 54.1282355304 +06 25 46.341284844   13 11.98     K1.5 130 1
54 HD 197286 PM* 20 44 10.2208462488 -39 13 30.855881604   9.98 9.50     F5V 75 1
55 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1070 1
56 BD+34 4779 PM* 22 52 09.8636387352 +35 26 49.608422844   10.77 10.36 10.15   F8V 76 1
57 BD+37 4734B PM* 22 57 46.8442481880 +38 40 30.358351704   10.82 9.87     G0V 158 1
58 WASP-6 * 23 12 37.7368282608 -22 40 26.273805024   12.90 11.91     G8V 86 1
59 WASP-10 V* 23 15 58.3006181424 +31 27 46.296056268   12.4   12.03   K5V 85 1
60 WASP-4 PM* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 159 1
61 BD+41 4831 * 23 39 05.8102996968 +42 27 57.505293900   10.88 10.47     F8V 80 1
62 WASP-5 V* 23 57 23.7564672192 -41 16 37.743700800   12.808 12.146 12.058 11.44 G4V 112 1
63 CD-35 16019 PM* 23 59 36.0711872328 -35 01 52.923618408   10.49 9.87 9.91   G6 103 0

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2023.01.30-05:31:19

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