2009A&A...498..567D


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.19CET16:52:33

2009A&A...498..567D - Astronomy and Astrophysics, volume 498, 567-574 (2009/5-1)

Binarity of transit host stars. Implications for planetary parameters.

DAEMGEN S., HORMUTH F., BRANDNER W., BERGFORS C., JANSON M., HIPPLER S. and HENNING T.

Abstract (from CDS):

Straight-forward derivation of planetary parameters can only be achieved in transiting planetary systems. However, planetary attributes such as radius and mass strongly depend on stellar host parameters. Discovering a transit host star to be multiple leads to a necessary revision of the derived stellar and planetary parameters. Based on our observations of 14 transiting exoplanet hosts, we derive parameters of the individual components of three transit host stars (WASP-2, TrES-2, and TrES-4) which we detected to be binaries. Two of these have not been known to be multiple before. Parameters of the corresponding exoplanets are revised. High-resolution ``Lucky Imaging'' with AstraLux at the 2.2m Calar Alto telescope provided near diffraction limited images in i' and z' passbands. These results have been combined with existing planetary data in order to recalibrate planetary attributes. Despite the faintness (Δmag∼4) of the discovered stellar companions to TrES-2, TrES-4, and WASP-2, light-curve deduced parameters change by up to more than 1σ. We discuss a possible relation between binary separation and planetary properties, which - if confirmed - could hint at the influence of binarity on the planet formation process.

Abstract Copyright:

Journal keyword(s): instrumentation: high angular resolution - stars: binaries: general - planets and satellites: general - stars: individual: WASP-2 - stars: individual: TrES-2 - stars: individual: TrES-4

Nomenclature: Table 4: [DHB2009] WASP-2/C N=1, [DHB2009] TrES-N/C (Nos TrES-2/C, TrES-4/C).

Simbad objects: 28

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Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 WASP-1 V* 00 20 40.0746033057 +31 59 23.953709844   12.06 11.31     F7V 106 1
2 BD+71 31 PM* 00 43 44.3495933172 +72 10 43.120084659 10.41 10.60   10.0   F5 68 0
3 * nu. And SB* 00 49 48.8473652 +41 04 44.076380 3.80 4.38 4.53 4.56 4.71 B5V 198 0
4 HD 17156 PM* 02 49 44.4866941172 +71 45 11.632197644   8.78 8.16     G0 147 2
5 BD+50 1471 PM* 07 48 06.4726006390 +50 13 32.921121328   12.002 11.138 10.669 10.243 G9V 142 1
6 * rho01 Cnc PM* 08 52 35.8113282132 +28 19 50.956901366 7.45 6.82   5.4   K0IV-V 990 1
7 Ross 905 PM* 11 42 11.0933874353 +26 42 23.658083337   12.06 10.613 10.272 8.24 M3V 515 1
8 * tau Boo Ro* 13 47 15.74340 +17 27 24.8552 5.02 4.98 4.49 4.09 3.85 F7IV-V 895 1
9 1SWASP J175207.01+373246.3 V* 17 52 07.0185036683 +37 32 46.237002085   13.114 12.402 12.06 11.603 G 64 1
10 TrES-3 Pl 17 52 07.0185036683 +37 32 46.237002085           ~ 199 2
11 [DHB2009] TrES-4/C * 17 53 13.0483509717 +37 12 44.131472948           K5.5-M0 11 2
12 TYC 2620-648-1 * 17 53 13.0490781575 +37 12 42.586106196   12.112 11.592     F8 43 2
13 TrES-4 Pl 17 53 13.0490781575 +37 12 42.586106196           ~ 184 2
14 HAT-P-5 * 18 17 37.3127577964 +36 37 17.168584830   12.92 11.95     G1V 54 1
15 Ross 711 SB* 18 35 19.1686791536 +28 41 55.413970670   11.83   11.2   A8 89 0
16 NAME V672 Lyr b Pl 19 04 09.8516024106 +36 37 57.445911611           ~ 312 1
17 V* V672 Lyr V* 19 04 09.8516024106 +36 37 57.445911611   12.35 11.42     K0V 102 1
18 Kepler-1 Er* 19 07 14.0379171930 +49 18 59.090895318   11.85 11.25     G0V 156 2
19 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 287 2
20 Kepler-1B * 19 07 14.113 +49 18 58.29           K4.5-6 23 1
21 HD 189733 BY* 20 00 43.7130382888 +22 42 39.071811263 9.241 8.578 7.648 7.126 6.68 K2V 744 1
22 WASP-2 V* 20 30 54.1279218812 +06 25 46.338261893   13 11.98     K1.5 120 1
23 WASP-2b Pl 20 30 54.1279218812 +06 25 46.338261893           ~ 91 1
24 ** DAE 10B * 20 30 54.179 +06 25 46.18           M0-1.5 22 1
25 TYC 511-2229-1 * 20 42 14.5846009500 +00 08 59.674982481 11.888 11.878 11.424 11.151 10.877 F5 14 0
26 HD 209458 V* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 1005 1
27 BD+37 4734B PM* 22 57 46.8443014981 +38 40 30.355384717   10.82 9.87     G0V 145 1
28 BD+41 4831 * 23 39 05.8101319829 +42 27 57.503480354   10.88 10.47     F8V 72 1

    Equat.    Gal    SGal    Ecl

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2021.01.19-16:52:33

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