2008MNRAS.386.1644S


Query : 2008MNRAS.386.1644S

2008MNRAS.386.1644S - Mon. Not. R. Astron. Soc., 386, 1644-1666 (2008/May-3)

Homogeneous studies of transiting extrasolar planets - I. Light-curve analyses.

SOUTHWORTH J.

Abstract (from CDS):

I present a homogeneous analysis of the transit light curves of 14 well-observed transiting extrasolar planets. The light curves are modelled using jktebop, random errors are measured using Monte Carlo simulations and the effects of correlated noise are included using a residual-permutation algorithm. The importance of stellar limb darkening on the light-curve solutions and parameter uncertainties is investigated using five different limb darkening laws and including different numbers of coefficients as fitted parameters. The linear limb darkening law cannot adequately fit the Hubble Space Telescope (HST) photometry of HD209458, but the other four laws give very similar results to each other for all transit light curves. In most cases fixing the limb darkening coefficients at theoretically predicted values does not bias the results, but does cause the error estimates to be too small. The available theoretical limb darkening coefficients clearly disagree with empirical values measured from the HST light curves of HD209458; limb darkening must be included as fitted parameters when analysing high-quality light curves.

In most cases the results of my analysis agree with the values found by other authors, but the uncertainties I find can be significantly larger (by factors of up to 3). Despite these greater uncertainty estimates, the analyses of sets of independent light curves for both HD189733 and HD209458 lead to results which do not agree with each other. This discrepancy is worst for the ratio of the radii (6.7σ for HD189733 and 3.7σ for HD209458), which depends primarily on the depth of the transit. It is therefore not due to the analysis method but is present in the light curves. These underlying systematic errors cannot be detected from the reduced data alone unless at least three independent light curves are available for an individual planetary system.

The surface gravities of transiting extrasolar planets are known to be correlated with their orbital periods. New surface gravity values, calculated from the light-curve results and the stellar spectroscopic orbits, show that this correlation is still present. New high-precision light curves are needed for HD149026, OGLE-TR-10, OGLE-TR-56, OGLE-TR-132 and GJ436, and new radial velocity curves for the XO-1, WASP-1, WASP-2 and the OGLE (Optical Gravitational Lensing Experiment) planetary systems.


Abstract Copyright: © 2008 The Author. Journal compilation © 2008 RAS

Journal keyword(s): binaries: eclipsing - stars: fundamental parameters - planetary systems

Simbad objects: 45

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Number of rows : 45
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 WASP-1b Pl 00 20 40.0746033057 +31 59 23.953709844           ~ 127 1
3 HD 17156 PM* 02 49 44.4871034544 +71 45 11.629235988   8.78 8.16     F9V 163 2
4 BD+57 793 * 04 21 52.7048156328 +57 49 01.889294952   10.27 9.85     F5V 145 2
5 * bet Aur EB* 05 59 31.7229284 +44 56 50.757259 1.97 1.93 1.90 1.82 1.83 A1IV-Vp 412 0
6 BD+50 1471 PM* 07 48 06.4723053776 +50 13 32.920598923   12.002 11.138 10.669 10.243 G9V 162 1
7 OGLE-TR 211 * 10 40 14.3828284632 -62 27 20.018236464       15.24   ~ 34 1
8 OGLE-TR 132 V* 10 50 34.5943868112 -61 57 26.138690064         15.72 F 96 1
9 NAME OGLE-TR-132b Pl 10 50 34.5945727713 -61 57 26.140283621           ~ 103 1
10 OGLE-TR 113 SB* 10 52 24.2810533560 -61 26 48.845675976     16.08 15.41 14.42 K 116 1
11 NAME OGLE-TR-111b Pl 10 53 17.8066842748 -61 24 20.606379347           ~ 111 1
12 OGLE-TR 111 V* 10 53 17.8069115424 -61 24 20.607791112     16.96 16.05 15.55 G 92 1
13 OGLE-TR 182 * 11 09 18.7248783144 -61 05 42.962710884     16.84 16.37   ~ 35 1
14 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 592 1
15 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 739 1
16 HAT-P-3 * 13 44 22.5937349736 +48 01 43.205733624   12.53 11.86     K1V 79 1
17 BD+36 2593 * 15 19 57.9203617176 +36 13 46.738078788   11.83 11.12     F 100 1
18 BD+28 2507 V* 16 02 11.8462322592 +28 10 10.420201452   11.88 11.25     G1V 99 1
19 BD+28 2507b Pl 16 02 11.8463105423 +28 10 10.419642379           ~ 174 1
20 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 158 2
21 HD 149026b Pl 16 30 29.6184841164 +38 20 50.310893575           ~ 330 1
22 HD 149026 PM* 16 30 29.6185771608 +38 20 50.308980864   8.75 8.14     G0IV 219 1
23 NAME OGLE-TR-10b Pl 17 51 28.2589927588 -29 52 35.232998832           ~ 87 1
24 OGLE-TR 10 EB* 17 51 28.2593510544 -29 52 35.231024064     15.780 16.193 14.92 G2V 89 1
25 1SWASP J175207.01+373246.3 V* 17 52 07.0184259768 +37 32 46.237377840   13.114 12.402 12.06 11.603 G 69 1
26 TYC 2620-648-1 * 17 53 13.0489562760 +37 12 42.586493328   12.112 11.592     F8 44 2
27 NAME OGLE-TR-56b Pl 17 56 35.5015759807 -29 32 21.476706712           ~ 199 1
28 OGLE-TR 56 EB* 17 56 35.5016678064 -29 32 21.479240220     16.560 16.07 15.30 ~ 166 1
29 HAT-P-5 * 18 17 37.3126923960 +36 37 17.170401468   12.92 11.95     G1V 61 1
30 BD+35 3293 V* 18 34 31.6252443960 +35 39 41.491899468   11.07 10.63 10.52   F7V 122 1
31 V* V672 Lyr V* 19 04 09.8515616256 +36 37 57.446680296   12.35 11.42     K0V 105 1
32 NAME V672 Lyr b Pl 19 04 09.8516024106 +36 37 57.445911611           ~ 325 1
33 Kepler-1 Er* 19 07 14.0375836512 +49 18 59.091482160   11.85 11.25     G0V 164 2
34 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 313 2
35 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 834 1
36 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1323 1
37 WASP-2b Pl 20 30 54.1279218812 +06 25 46.338261893           ~ 99 1
38 WASP-2 V* 20 30 54.1282355304 +06 25 46.341284844   13 11.98     K1.5 130 1
39 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1070 1
40 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1741 1
41 BD+37 4734B PM* 22 57 46.8442481880 +38 40 30.358351704   10.82 9.87     G0V 158 1
42 NAME BD+37 4734Bb Pl 22 57 46.8443014981 +38 40 30.355384717           ~ 230 1
43 WASP-4 PM* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 159 1
44 BD+41 4831 * 23 39 05.8102996968 +42 27 57.505293900   10.88 10.47     F8V 80 1
45 WASP-5 V* 23 57 23.7564672192 -41 16 37.743700800   12.808 12.146 12.058 11.44 G4V 112 1

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2023.01.28-12:17:34

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