2011A&A...525A..65P


Query : 2011A&A...525A..65P

2011A&A...525A..65P - Astronomy and Astrophysics, volume 525A, 65-65 (2011/1-1)

The barycentric motion of exoplanet host stars. Tests of solar spin-orbit coupling.

PERRYMAN M.A.C. and SCHULZE-HARTUNG T.

Abstract (from CDS):

Empirical evidence suggests a tantalising but unproven link between various indicators of solar activity and the barycentric motion of the Sun. The latter is exemplified by transitions between regular and more disordered motion modulated by the motions of the giant planets, and rare periods of retrograde motion with negative orbital angular momentum. An examination of the barycentric motion of exoplanet host stars, and their stellar activity cycles, has the potential of proving or disproving the Sun's motion as an underlying factor in the complex patterns of short- and long-term solar variability indices, by establishing whether such correlations exist in other planetary systems. In either case, these studies may lead to further insight into the nature of the solar dynamo. Some 40 multiple exoplanet systems are now known, all with reasonably accurate orbital elements. The forms and dynamical functions of the barycentric motion of their host stars are examined. These results can be compared with long-term activity indicators of exoplanet host stars, as they become available, to examine whether the correlations claimed for the Sun also exist in other systems. Published orbital elements of multiple exoplanetary systems are used to examine their host star barycentric motions. For each system, we determine analytically the orbital angular momentum of the host star, and its rate of change. A variety of complex patterns of barycentric motions of exoplanet host stars is demonstrated, depending on the number, masses and orbits of the planets. Each of the behavioural types proposed to correlate with solar activity are also evident in exoplanet host stars: repetitive patterns influenced by massive multiple planets, epochs of rapid change in orbital angular momentum, and intervals of negative orbital angular momentum. The study provides the basis for independent investigations of the widely-studied but unproven suggestion that the Sun's motion is somehow linked to various indicators of solar activity. We show that, because of the nature of their barycentric motions, the host stars HD 168443 and HD 74156 offer particularly powerful tests of this hypothesis.

Abstract Copyright:

Journal keyword(s): astrometry - planets and satellites: general - Sun: activity - stars: activity

Simbad objects: 41

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Number of rows : 41
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 HD 9446 PM* 01 33 20.1847092432 +29 15 54.539434692   9.03   8.0   G5V 58 1
2 * ups And PM* 01 36 47.8415443907 +41 24 19.651368029 4.70 4.64 4.10 3.64 3.35 F9V 918 1
3 HD 11964 PM* 01 57 09.6074243168 -10 14 32.732533622   7.25 6.42     G9VCN+1 168 1
4 HD 12661 PM* 02 04 34.2881404104 +25 24 51.513637932   8.16   7.0   K0V 244 1
5 BD+20 518 PM* 03 11 14.2301712744 +21 05 50.493993288   9.26 8.50     G6V 100 1
6 HD 37124 PM* 05 37 02.4866159419 +20 43 50.832948117   8.35   7.2   G4IV-V 280 2
7 HD 38529 PM* 05 46 34.9131388488 +01 10 05.502949860       5.4   G8III/IV 330 2
8 HD 40307 PM* 05 54 04.2405000288 -60 01 24.493007640 8.814 8.097 7.147 6.597 6.119 K2.5V 228 1
9 HD 45364 PM* 06 25 38.4743561928 -31 28 51.430718388   8.82 8.06     G8V 113 1
10 HD 47186 PM* 06 36 08.7879310512 -27 37 20.268367464   8.36 7.63     G6V 124 1
11 CoRoT-7 * 06 43 49.4690164104 -01 03 46.826642700   12.78 11.73 11.36 10.87 K0V 189 1
12 HD 60532 PM* 07 34 03.1805638968 -22 17 45.843172440 5.02 4.94 4.39     F6IV-V 213 1
13 HD 69830 PM* 08 18 23.9469682407 -12 37 55.817187530   6.74 5.95     G8:V 494 1
14 HD 73526 PM* 08 37 16.4833548528 -41 19 08.790456324   9.69 9.00     G6V 177 2
15 HAT-P-13 * 08 39 31.8072358440 +47 21 07.273799280   11.15 10.42 10.40   G4 123 2
16 HD 74156 PM* 08 42 25.1219511432 +04 34 41.145751740       7.2   G1V 213 2
17 * rho01 Cnc PM* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1037 1
18 HD 82943 PM* 09 34 50.7353072232 -12 07 46.369202196   7.17 6.53     F9VFe+0.5 435 2
19 BD-08 2823 PM* 10 00 47.7204762252 -09 31 00.044866538   10.94 9.874 9.801   K4:V 60 1
20 BD+20 2457 * 10 16 44.8671846183 +19 53 29.010025880   10.99 9.74     K2 54 1
21 * 47 UMa PM* 10 59 27.9727514012 +40 25 48.920572724   5.66   4.7   G1-VFe-0.5 748 1
22 HD 108874 PM* 12 30 26.8817398344 +22 52 47.377485192   9.49   8.3   G9V 148 1
23 * 61 Vir PM* 13 18 24.3139864471 -18 18 40.297748582 5.710 5.440 4.740     G6.5V 631 1
24 * tau Boo Ro* 13 47 15.7381720026 +17 27 24.809555600 5.02 4.98 4.49 4.09 3.85 F7IV-V 942 1
25 HD 128311 BY* 14 36 00.5602765558 +09 44 47.454573266 9.232 8.441 7.446 6.895 6.425 K3V 288 1
26 * 23 Lib PM* 15 13 28.6669233518 -25 18 33.653388418   7.168 6.46 6.43   G6IV-V 281 1
27 BD-07 4003 BY* 15 19 26.8269387505 -07 43 20.189497466 13.403 11.76 10.560 9.461 8.911 M3V 589 2
28 HD 147018 PM* 16 23 00.1478804220 -61 41 19.559913914   9.07 8.30     G8/K0V 59 1
29 HD 155358 PM* 17 09 34.6176428924 +33 21 21.085565784       7.0   G0 146 1
30 * mu. Ara PM* 17 44 08.7031414872 -51 50 02.591603160   5.85 5.15     G3IV-V 498 2
31 HD 168443 PM* 18 20 03.9332862096 -09 35 44.614653900   7.62 6.92     G6V 294 1
32 HD 169830 * 18 27 49.4849984976 -29 49 00.700831380   6.406 5.902 7.01   F7V 264 1
33 HD 181433 PM* 19 25 09.5666936172 -66 28 07.676956827   9.42 8.38     K3III-IV 113 1
34 HD 183263 * 19 28 24.5713671072 +08 21 29.004515424   8.51 7.86     G2IV 112 1
35 * 16 Cyg B PM* 19 41 51.9726777456 +50 31 03.089030916 7.07 6.86 6.20 5.76 5.42 G3V 839 1
36 HD 187123 PM* 19 46 58.1122487784 +34 25 10.281404460       7.4   G2V 231 1
37 HD 190360 PM* 20 03 37.4050868074 +29 53 48.492435887   6.44   5.2   G7IV-V 415 1
38 HD 202206 PM* 21 14 57.7686051936 -20 47 21.161521320   8.79 8.07     G6V 210 1
39 HD 215497 PM* 22 46 36.7539769920 -56 35 58.326725148   9.92 8.95     K3V 48 1
40 BD-15 6290 BY* 22 53 16.7325836486 -14 15 49.304052185 12.928 11.749 10.192 9.013 7.462 M3.5V 925 1
41 HD 217107 ** 22 58 15.5408995872 -02 23 43.383234768   6.919 6.163     G8IV/V 347 1

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2022.07.05-17:11:02

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