2013MNRAS.428..182B

Query : 2013MNRAS.428..182B

2013MNRAS.428..182B - Mon. Not. R. Astron. Soc., 428, 182-189 (2013/January-1)

Stellar companions to exoplanet host stars: Lucky imaging of transiting planet hosts.

BERGFORS C., BRANDNER W., DAEMGEN S., BILLER B., HIPPLER S., JANSON M., KUDRYAVTSEVA N., GEISSLER K., HENNING T. and KOHLER R.

Abstract (from CDS):

Observed properties of stars and planets in binary/multiple star systems provide clues to planet formation and evolution. We extended our survey for visual stellar companions to the hosts of transiting exoplanets by 21 stars, using the Lucky Imaging technique with the two AstraLux instruments: AstraLux Norte at the Calar Alto 2.2-m telescope and AstraLux Sur at the European Southern Observatory 3.5-m New Technology Telescope at La Silla. Typically, a sensitivity to companions of magnitude difference Δz' ~ 4 is achieved at angular separation ρ = 0.5arcsec and Δz' ≳ 6 for ρ = 1arcsec.

We present observations of two previously unknown binary candidate companions, to the transiting planet host stars HAT-P-8 and WASP-12, and derive photometric and astrometric properties of the companion candidates. The common proper motions of the previously discovered companion candidates with the exoplanet host stars TrES-4 and WASP-2 are confirmed from follow-up observations. A Bayesian statistical analysis of 31 transiting exoplanet host stars observed with AstraLux suggests that the companion star fraction of planet hosts is not significantly different from that of solar-type field stars, but that the binary separation is on average larger for planet host stars.


Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): techniques: high angular resolution - binaries: visual - planetary systems

Nomenclature: NAME Bergfors-6.

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3918 0
2 BD+57 793 * 04 21 52.7048156328 +57 49 01.889294952   10.27 9.85     F5V 152 2
3 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1620 1
4 NAME WASP-12BC LM* 06 30 32.71 +29 40 20.2           ~ 2 0
5 WASP-12b Pl 06 30 32.7966092352 +29 40 20.263502460           ~ 763 1
6 WASP-12 EB* 06 30 32.7966092352 +29 40 20.263502460   12.14 11.57     G0V 309 1
7 XO-4 * 07 21 33.1602434760 +58 16 05.109533364   11.15 10.81     F5 63 1
8 XO-5 * 07 46 51.9614762400 +39 05 40.460854956     12.1 11.95   G7 51 1
9 HAT-P-13 * 08 39 31.8072358440 +47 21 07.273799280   11.15 10.42 10.40   G4 136 2
10 BD+34 1976 V* 09 20 24.7145388600 +33 52 56.696039796   11.21 10.42     G1V 74 1
11 HD 80606 PM* 09 22 37.5768032712 +50 36 13.435326684   9.78 9.00     G8V 330 2
12 NGC 3603 OpC 11 15 10.8 -61 15 32           ~ 1067 1
13 CD-31 10766 * 13 55 42.7120177608 -32 09 34.616222028   11.396 10.910     F7 73 1
14 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 174 2
15 HD 149026 PM* 16 30 29.6185771608 +38 20 50.308980864   8.75 8.14     G0IV 235 1
16 TYC 2620-648-1 * 17 53 13.0489562760 +37 12 42.586493328   12.112 11.592     F8 46 2
17 [DHB2009] TrES-4/C * 17 53 13.0495966800 +37 12 44.138873736           K5.5-M0 12 2
18 BD+35 3293 V* 18 34 31.6252443960 +35 39 41.491899468   11.07 10.63 10.52   F7V 128 1
19 Kepler-1 EB* 19 07 14.0375836512 +49 18 59.091482160   11.85 11.25     G0V 176 2
20 Kepler-1B * 19 07 14.113 +49 18 58.29           K4.5-6 23 1
21 BD+47 2846 Er* 19 28 59.3538826128 +47 58 10.217007804   10.97 10.48     F6V 306 2
22 [NKB2010] HAT-P-7 East * 19 28 59.75 +47 58 10.3           M5V-M6V 2 0
23 BD+47 2936 EB* 19 50 50.2472976936 +48 04 51.101390496       8.8   K4V 300 2
24 WASP-2 V* 20 30 54.1282355304 +06 25 46.341284844   13 11.98     K1.5 139 1
25 WASP-2b Pl 20 30 54.1282355304 +06 25 46.341284844           ~ 108 1
26 ** DAE 10B * 20 30 54.179 +06 25 46.18           M0-1.5 23 1
27 HD 197286 PM* 20 44 10.2208462488 -39 13 30.855881604   9.98 9.50     F5V 80 1
28 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1115 1
29 BD+34 4779 PM* 22 52 09.8636387352 +35 26 49.608422844   10.77 10.36 10.15   F8V 82 1
30 BD+34 4779b Pl 22 52 09.8636387352 +35 26 49.608422844           ~ 81 1
31 WASP-4 EB* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 176 1
32 WASP-5 EB* 23 57 23.7564672192 -41 16 37.743700800   12.808 12.146 12.058 11.44 G4V 120 1

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