2011A&A...535A.116D


Query : 2011A&A...535A.116D

2011A&A...535A.116D - Astronomy and Astrophysics, volume 535A, 116-116 (2011/11-1)

Prospecting transit duration variations in extrasolar planetary systems.

DAMIANI C. and LANZA A.F.

Abstract (from CDS):

Transiting planetary systems allow us to extract geometrical information, e.g., the angle ε between the orbital angular momentum and the stellar spin, that can be used to discriminate among different formation and evolutionary scenarios. This angle is constrained by means of the Rossiter-McLaughlin effect observed on radial velocity and can be subject to large uncertainties, especially for hot stars (Teff>6250K). It is thus interesting to have an alternative method to constrain the value of the obliquity ε and to detect companions that might have disturbed the orbit of the planet. We show how the long-term variations in the transit duration (TDV) can be used to constrain the obliquity of the stellar rotation axis. Our calculations may also be used to put an upper limit on the contribution of geometrical effects to the TDVs, thus allowing us to indirectly infer the presence of additional companions. We introduce a simple theory to describe the secular variations in the orbital elements and their effects on the TDVs with a general formulation valid for both oblique and eccentric systems. Parameters or orbital elements that cannot be directly measured, such as the longitude of the ascending node of the orbit, are avoided thus allowing us to perform a straightforward application.We compute the expected TDVs for the presently known transiting systems, adopting their parameters found in the literature. Considering the capabilities of the present or next generation space-borne telescopes, we point out the systems that could be readily observed and discuss the constraints derivable on their fundamental parameters. Measured TDVs can be used to constrain the obliquity of the stars (and possibly of the planets in systems younger than 10-100Myr), giving information about the formation scenarios, the strength of the tidal coupling, and the internal structure of both the stars and the planets. Moreover, they can provide an indirect indication of other bodies, even with a mass comparable with that of the Earth, because they give rise to additional contributions to the nodal precession.

Abstract Copyright:

Journal keyword(s): planetary systems - planet-star interactions - stars: rotation

Simbad objects: 25

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Number of rows : 25
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 HD 10069 SB* 01 37 25.0332798696 -45 40 40.374717456   9.74 9.30     F6IV/V 211 1
2 HD 15082 dS* 02 26 51.0582618096 +37 33 01.736482032   8.41 8.14     kA5hA8mF4 180 1
3 BD+57 793 * 04 21 52.7048156328 +57 49 01.889294952   10.27 9.85     F5V 147 2
4 WASP-12 ** 06 30 32.7966092352 +29 40 20.263502460   12.14 11.57     G0V 289 2
5 CoRoT-1 * 06 48 19.1723766840 -03 06 07.710745140     13.6 13.44 12.88 G0V 122 2
6 HAT-P-24 * 07 15 18.0193656720 +14 15 45.408025008   12.21 11.76 11.71   F8 45 1
7 HAT-P-9 * 07 20 40.4564614032 +37 08 26.342829060   12.35 12.34 12.08   F 52 1
8 WASP-19 V* 09 53 40.0765648584 -45 39 33.057187596   13.05 12.31 12.12 11.35 G8V 168 2
9 OGLE2-TR L9 * 11 07 55.1808382920 -61 08 46.537684260       14.60   F3 34 1
10 HAT-P-21 * 11 25 05.9859193536 +41 01 40.664937216   12.56 11.46 11.71   G3 32 1
11 CD-27 10695 * 15 59 50.9491505016 -28 03 42.312819096   11.83 11.59 11.31 10.92 F4 111 1
12 HD 146389 * 16 15 50.3653280520 +10 01 57.284258556   9.866 9.39 9.22   F8 53 1
13 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 163 2
14 BD+38 2917 * 17 20 27.8781604680 +38 14 31.908984936   10.41 9.99     F5V 64 1
15 V* V5127 Sgr EB* 17 51 50.8845340566 -29 54 43.691222337     14.862   14.01 A3V 10 0
16 TrES-4 Pl 17 53 13.0490781575 +37 12 42.586106196           ~ 203 2
17 OGLE-TR 56 EB* 17 56 35.5016678064 -29 32 21.479240220     16.560 16.07 15.30 ~ 166 1
18 BD+35 3293 V* 18 34 31.6252443960 +35 39 41.491899468   11.07 10.63 10.52   F7V 123 1
19 CoRoT-11 EB* 18 42 44.9499236256 +05 56 15.652972716   13.73 12.939     F6V 50 1
20 Kepler-8 Ro* 18 45 09.1489991376 +42 27 03.891327156           F6V 102 1
21 CoRoT-2 * 19 27 06.4944378024 +01 23 01.359897468   13.422 12.568 12.204 11.49 G7V+K9V 241 2
22 BD+47 2846 Er* 19 28 59.3538826128 +47 58 10.217007804   10.97 10.48     F6V 292 2
23 HAT-P-23 * 20 24 29.7234392904 +16 45 43.811510112   13.05 11.94 12.27   G0 61 1
24 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1079 1
25 BD+41 4831 * 23 39 05.8102996968 +42 27 57.505293900   10.88 10.47     F8V 82 1

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2023.06.09-23:42:07

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