2016A&A...589A..58E

Query : 2016A&A...589A..58E

2016A&A...589A..58E - Astronomy and Astrophysics, volume 589A58-58 (2016/5-1)

High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). I. Lucky imaging observations of 101 systems in the southern hemisphere.

EVANS D.F., SOUTHWORTH J., MAXTED P.F.L., SKOTTFELT J., HUNDERTMARK M., JORGENSEN U.G., DOMINIK M., ALSUBAI K.A., ANDERSEN M.I., BOZZA V., BRAMICH D.M., BURGDORF M.J., CICERI S., D'AGO G., FIGUERA JAIMES R., GU S.-H., HAUGBOLLE T., HINSE T.C., JUNCHER D., KAINS N., KERINS E., KORHONEN H., KUFFMEIER M., MANCINI L., PEIXINHO N., POPOVAS A., RABUS M., RAHVAR S., SCHMIDT R.W., SNODGRASS C., STARKEY D., SURDEJ J., TRONSGAARD R., VON ESSEN C., WANG Y.-B. and WERTZ O.

Abstract (from CDS):

Context. Wide binaries are a potential pathway for the formation of hot Jupiters. The binary fraction among host stars is an important discriminator between competing formation theories, but has not been well characterised. Additionally, contaminating light from unresolved stars can significantly affect the accuracy of photometric and spectroscopic measurements in studies of transiting exoplanets.
Aims. We observed 101 transiting exoplanet host systems in the Southern hemisphere in order to create a homogeneous catalogue of both bound companion stars and contaminating background stars, in an area of the sky where transiting exoplanetary systems have not been systematically searched for stellar companions. We investigate the binary fraction among the host stars in order to test theories for the formation of hot Jupiters.
Methods. Lucky imaging observations from the Two Colour Instrument on the Danish 1.54m telescope at La Silla were used to search for previously unresolved stars at small angular separations. The separations and relative magnitudes of all detected stars were measured. For 12 candidate companions to 10 host stars, previous astrometric measurements were used to evaluate how likely the companions are to be physically associated.
Results. We provide measurements of 499 candidate companions within 20 arcsec of our sample of 101 planet host stars. 51 candidates are located within 5 arcsec of a host star, and we provide the first published measurements for 27 of these. Calibrations for the plate scale and colour performance of the Two Colour Instrument are presented.
Conclusions. We find that the overall multiplicity rate of the host stars is 38+17–13%, consistent with the rate among solar-type stars in our sensitivity range, suggesting that planet formation does not preferentially occur in long period binaries compared to a random sample of field stars. Long period stellar companions (P>10yr) appear to occur independently of short period companions, and so the population of close-in stellar companions is unconstrained by our study.

Abstract Copyright: © ESO, 2016

Journal keyword(s): planets and satellites: dynamical evolution and stability - planets and satellites: formation - techniques: high angular resolution - binaries: visual

VizieR on-line data: <Available at CDS (J/A+A/589/A58): table1.dat table4.dat table8.dat>

Simbad objects: 85

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Number of rows : 85
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 WASP-44 * 00 15 36.7694650296 -11 56 17.284833996   13.823 13.054 12.988 12.19 ~ 46 1
2 WASP-26 * 00 18 24.7008060816 -15 16 02.275778784   11.62 11.30 10.99 10.46 G0 66 1
3 WASP-45 PM* 00 20 56.9941303416 -35 59 53.746646676   13.33 11.80 12.20   ~ 43 1
4 EGGR 382 PM* 00 33 54.4629362352 -12 07 58.775300904 15.511 15.572 14.891 14.467 14.051 DC? 103 0
5 CD-34 241 * 00 41 46.9202319216 -33 39 08.430046524   11.696 11.208     F 17 0
6 CD-56 324 PM* 01 38 25.0565551464 -55 46 19.525595664   11.31 10.57     G5 48 0
7 BD-07 436 ** 02 28 37.226 -07 03 38.39   10.87 10.12 10.23   G9 51 0
8 WASP-22 * 03 31 16.3267124400 -23 49 10.840600632   12.38 11.99 11.41   G 78 1
9 WASP-98 * 03 53 42.9206066712 -34 19 41.585663208     13.0     G7 37 0
10 HATS-5 * 04 28 53.4832441440 -21 28 55.061983848   13.439 12.630     ~ 30 0
11 CPD-64 356 * 04 35 50.3301268152 -64 01 37.333851168   11.07 10.80     F2 46 0
12 BD-06 1077 * 05 04 19.6323194352 -06 13 47.378185788   11.55 10.94     ~ 56 1
13 V* V1174 Ori Or* 05 34 27.8529220296 -05 41 37.875014808 16.506 15.070 14.305   12.367 K4.5e 59 0
14 WASP-49 PM* 06 04 21.4735743408 -16 57 55.108744668   11.93 11.35     G6V 68 1
15 HATS-4 * 06 16 26.9016034152 -22 32 48.814145304   14.267 13.459     ~ 27 0
16 CoRoT-19 * 06 28 08.0586807504 -00 10 14.532816504   14.780 14.007 14.17 13.00 ~ 43 1
17 CoRoT-20 * 06 30 52.9022402976 +00 13 36.858436428   15.41 14.66 14.60 13.69 ~ 32 2
18 CoRoT-18 * 06 32 41.3776636176 -00 01 53.725599732   15.8 15.00 14.9 14.05 ~ 55 2
19 CPD-23 1329 * 06 33 24.2671186968 -23 29 10.297934988   10.78 10.34     F6 50 0
20 CoRoT-7 * 06 43 49.4690164104 -01 03 46.826642700   12.78 11.73 11.36 10.87 K0V 232 1
21 WASP-64 * 06 44 27.6050701128 -32 51 30.179289384           ~ 41 1
22 WASP-23 PM* 06 44 30.6133625784 -42 45 42.666796404   13.42 12.52 12.31   ~ 62 1
23 CoRoT-1 * 06 48 19.1723766840 -03 06 07.710745140     13.6 13.44 12.88 G0V 142 2
24 CoRoT-4 * 06 48 46.7134456728 -00 40 21.969631416       13.42   F0V 81 1
25 CoRoT-13 EB* 06 50 53.0726565720 -05 05 11.190799896   15.33 15.039 15.17 14.19 G0V 36 1
26 HAT-P-35 * 08 13 00.1784913648 +04 47 13.416267948   12.84 11.59 12.38   ~ 42 1
27 BD+06 1909 Em* 08 15 47.9802408792 +05 50 12.350816484   10.95 10.35     F7 85 1
28 WASP-36 Em* 08 46 19.2977439552 -08 01 37.015743396   13.1 12.7   12.05 G2 75 1
29 WASP-65 Em* 08 53 17.8288214088 +08 31 22.809193788   12.39 12.45 11.76   F9 31 1
30 WASP-19 * 09 53 40.0765648584 -45 39 33.057187596   13.05 12.31 12.12 11.35 G8V 207 2
31 WASP-66 * 10 32 53.9927754048 -34 59 23.457552792   12.00 11.60     F4 39 1
32 OGLE-TR 211 * 10 40 14.3828284632 -62 27 20.018236464       15.24   ~ 39 1
33 OGLE-TR 113 SB* 10 52 24.2810533560 -61 26 48.845675976     16.08 15.407 14.42 K 119 1
34 OGLE2-TR L9 * 11 07 55.1808382920 -61 08 46.537684260       14.60   F3 38 1
35 WASP-31 * 11 17 45.3578677224 -19 03 17.217631800   12.01 11.66 11.98   F: 87 1
36 HATS-1 * 11 42 06.0806028384 -23 21 17.431249716   12.729 12.059 12.08 11.38 ~ 44 1
37 HATS-2 * 11 46 57.3702458424 -22 33 46.817348148   14.53 13.62 13.40   ~ 50 1
38 CD-29 9873 * 12 42 28.4949559632 -30 38 23.529045948   12.36 11.63 11.39 10.78 G8V 76 1
39 WASP-42 PM* 12 51 55.5581398320 -42 04 25.096306584           ~ 39 1
40 WASP-55 * 13 35 01.9537865424 -17 30 12.527623872   12.69 11.75     G1 74 1
41 BD+00 3088 * 13 41 49.0301166312 -00 07 41.032748568   11.01 10.41 10.0 9.773 F8 52 1
42 CD-31 10766 * 13 55 42.7120177608 -32 09 34.616222028   11.396 10.910     F7 89 1
43 HAT-P-26 PM* 14 12 37.5331103311 +04 03 36.116569918   12.33 11.76 11.56   K1 81 1
44 WASP-16 * 14 18 43.9225013904 -20 16 31.843626168   12.51 11.29 11.00 10.49 G3V 88 1
45 WASP-39 * 14 29 18.4151689656 -03 26 40.204480380   12.93 12.09 12.17 11.29 ~ 106 1
46 WASP-37 * 14 47 46.5619510032 +01 03 53.799541704   13.304 12.704 12.87 12.24 G2V 45 1
47 HAT-P-27 * 14 51 04.1870399712 +05 56 50.548526376   13.18 12.19 11.98 11.23 G8 71 1
48 WASP-57 V* 14 55 16.8228361512 -02 03 27.599615424   13.6 13.04 12.90 12.243 G6 35 1
49 WASP-24 * 15 08 51.7367171808 +02 20 35.962165104   12.00 11.22 11.43   F8-9 71 1
50 CD-27 10695 * 15 59 50.9491505016 -28 03 42.312819096   11.83 11.59 11.31 10.92 F4 141 1
51 WASP-103 * 16 37 15.5765824488 +07 11 00.109678740     12.1     F8V 83 1
52 G 139-21 PM* 17 15 18.9339850845 +04 57 50.066612336     14.71 13.26 11.50 M4.5V 372 1
53 HAT-P-46 * 18 01 46.6085289960 -02 58 15.458098944   12.9 11.94 11.62 11.07 ~ 31 1
54 OGLE 3 * 18 04 43.45 -30 14 10.7     17.6     ~ 13 0
55 HAT-P-45 * 18 17 29.5774338144 -03 22 51.737462436   13.7 12.79 12.32 11.68 F5 25 1
56 CoRoT-25 * 18 42 31.1200340280 +06 30 49.746776256 15.93 15.84 15.02 14.61   ~ 18 1
57 CoRoT-11 EB* 18 42 44.9499236256 +05 56 15.652972716   13.488 12.869 12.869   F6V 57 1
58 CoRoT-9 * 18 43 08.8100358120 +06 12 14.913236808   14.57 13.46 13.75   G3V 56 1
59 CoRoT-6 * 18 44 17.4078666144 +06 39 47.513042100   14.68 13.80 14.18   F5V 56 1
60 Kepler-1b Pl 19 07 14.0375836512 +49 18 59.091482160           ~ 349 2
61 CoRoT-8 * 19 26 21.2425572360 +01 25 35.177500524   16.096 14.797 14.267 13.26 K1V 40 1
62 CoRoT-2 * 19 27 06.4944378024 +01 23 01.359897468   13.422 12.568 12.204 11.49 G7V+K9V 267 2
63 CoRoT-3 EB* 19 28 13.2642131544 +00 07 18.613986132   14.199 13.292 13.099 12.54 F3V 86 1
64 WASP-67 * 19 42 58.5218345280 -19 56 58.521259680   12.90 12.54     K0V 39 1
65 HAT-P-41 * 19 49 17.4398486136 +04 40 20.786070360   11.65 11.36     ~ 56 1
66 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 267 0
67 WASP-80 PM* 20 12 40.1693365800 -02 08 39.187438476   12.810 11.939 11.510 10.279 K7V-M0V 98 1
68 WASP-2 V* 20 30 54.1282355304 +06 25 46.341284844   13 11.98     K1.5 157 1
69 WASP-2B * 20 30 54.179 +06 25 46.18           M0-1.5 23 1
70 HD 196286 EB* 20 36 58.1225826000 -19 08 42.402731172   10.72 10.11 10.136   F7V 21 1
71 WASP-88 * 20 38 02.6869030656 -48 27 43.424304480   12.02 11.39     ~ 27 1
72 HD 197286 PM* 20 44 10.2208462488 -39 13 30.855881604   9.98 9.50     F5V 91 1
73 HATS-3 * 20 49 49.7853010920 -24 25 43.537820952   12.45 12.43     ~ 28 1
74 BD-05 5432 PM* 21 00 06.1968214728 -05 05 40.034944176   10.93 9.87     ~ 103 1
75 HD 358155 ** 21 01 54.480000 -13 25 59.71008   11.75 10.79 11.12   G4+K3 25 1
76 WASP-90 V* 21 02 07.6772028864 +07 03 22.517627472           F6 22 0
77 WASP-46 * 21 14 56.8598669520 -55 52 18.458085144   13.0   13.06 12.29 G6 56 1
78 NGC 7293 PN 22 29 38.5454047152 -20 50 13.747242408 11.894 13.158 13.524 13.689 13.898 DAO.5 983 1
79 LP 877-23 PM* 22 52 41.0353986762 -20 35 32.994432457   13.02 11.90     ~ 119 0
80 WASP-6 * 23 12 37.7368282608 -22 40 26.273805024   12.90 11.91     G8V 112 1
81 EGGR 264 WD* 23 19 35.3881861344 -17 05 28.465573380 13.279 14.132 14.111 14.07 14.049 DB3 131 0
82 Feige 110 HS* 23 19 58.3996844256 -05 09 56.171142864 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 673 1
83 WASP-28 * 23 34 27.8814904872 -01 34 48.110067912   12.61     11.47 F8-G0 54 1
84 CD-35 16019 PM* 23 59 36.0711872328 -35 01 52.923618408   10.49 9.87 9.91   G6 139 0
85 CD-35 16019B PM* 23 59 36.1282734288 -35 01 57.344841912           ~ 8 0

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