2018A&A...620A.139L

Query : 2018A&A...620A.139L

2018A&A...620A.139L - Astronomy and Astrophysics, volume 620A139-139 (2018/12-1)

Incidence of planet candidates in open clusters and a planet confirmation.

LEAO I.C., CANTO MARTINS B.L., ALVES S., PEREIRA DE OLIVEIRA G., CORTES C., BRUCALASSI A., MELO C.H.F., DE FREITAS D.B., PASQUINI L. and DE MEDEIROS J.R.

Abstract (from CDS):


Context. Detecting exoplanets in clusters of different ages is a powerful tool for understanding a number of open questions, such as how the occurrence rate of planets depends on stellar metallicity, on mass, or on stellar environment.
Aims. We present the first results of our HARPS long-term radial velocity (RV) survey which aims to discover exoplanets around intermediate-mass (between ∼2 and 6M☉) evolved stars in open clusters.
Methods. We selected 826 bona fide HARPS observations of 114 giants from an initial list of 29 open clusters and computed the half-peak to peak variability of the HARPS RV measurements, namely ΔRV/2, for each target, to search for the best planet-host candidates. We also performed time series analyses for a few targets for which we have enough observations to search for orbital solutions.
Results. Although we attempted to rule out the presence of binaries on the basis of previous surveys, we detected 14 new binary candidates in our sample, most of them identified from a comparison between HARPS and CORAVEL data. We also suggest 11 new planet-host candidates based on a relation between the stellar surface gravity and ΔRV/2. Ten of the candidates are less than 3M☉, showing evidence of a low planet occurrence rate for massive stars. One of the planet-host candidates and one of the binary candidates show very clear RV periodic variations, allowing us to confirm the discovery of a new planet and to compute the orbital solution for the binary. The planet is IC 4651 9122b, with a minimum mass of msini=6.3MJ and a semimajor axis a=2.0AU. The binary companion is NGC 5822 201B, with a very low minimum mass of msini=0.11M☉ and a semimajor axis a=6.5AU, which is comparable to the Jupiter distance to the Sun.

Abstract Copyright: © ESO 2018

Journal keyword(s): planetary systems - open clusters and associations: general - stars: late-type - binaries: spectroscopic - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/620/A139): tablea1.dat rv.dat>

Simbad objects: 149

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Number of rows : 149
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 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
2 NGC 1662 OpC 04 48 48.5 +10 52 46   7.0 6.4     ~ 149 0
3 NGC 2204 1320 * 06 15 21.4239363336 -18 35 51.340169436   13.744 12.607     K0III 20 0
4 NGC 2204 4137 * 06 15 31.4037478800 -18 42 56.430322488   12.80 11.97     K4.5III 22 0
5 NGC 2204 OpC 06 15 31.5 -18 40 28   9.35 8.6     ~ 172 0
6 NGC 2204 2136 * 06 15 33.9319735176 -18 37 21.720113292   14.287 13.122     ~ 17 0
7 NGC 2204 3325 * 06 15 36.6640851696 -18 46 52.748599224   13.254 11.563     ~ 28 0
8 NGC 2204 3324 * 06 15 40.3868464944 -18 46 37.074766296   14.130 12.830     ~ 20 0
9 NGC 2204 2212 * 06 15 49.7008758624 -18 37 39.423747576   13.97 12.76     ~ 24 0
10 NGC 2251 OpC 06 34 44.8 +08 21 15   7.69 7.3     ~ 123 0
11 NGC 2324 OpC 07 04 08.5 +01 02 50   8.83 8.4     ~ 174 0
12 NGC 2345 14 * 07 08 17.4623355624 -13 11 30.485397912   12.79 10.73     K2II 9 0
13 NGC 2345 OpC 07 08 21.4 -13 11 44   8.58 7.7     ~ 92 0
14 NGC 2345 43 * 07 08 26.3197214208 -13 11 14.441334900   12.51 10.70     K0Ib-II 13 0
15 2MASS J07082701-1312329 s*r 07 08 27.0114912696 -13 12 32.987110284   12.44 10.40     K4Ib 15 0
16 NGC 2345 60 * 07 08 30.3703598472 -13 13 52.554084492   12.30 10.48     K2Ib-II 12 0
17 NGC 2354 152 * 07 13 46.6267341504 -25 43 33.839083236   13.994 12.870     ~ 8 0
18 NGC 2354 91 * 07 13 49.4610346272 -25 39 25.196935392   12.811 11.656     ~ 15 0
19 NGC 2354 183 * 07 13 51.9315243024 -25 44 24.215741448   12.805 11.555     ~ 21 0
20 NGC 2354 66 * 07 13 54.5053255920 -25 37 53.897588220   12.85 11.73     ~ 10 0
21 NGC 2354 OpC 07 13 59.2 -25 43 40   7.28 6.5     ~ 111 0
22 NGC 2354 205 * 07 13 59.2049827008 -25 45 50.095203876   12.33 11.13     ~ 16 0
23 CD-25 4246 SB* 07 14 11.2252745520 -25 46 15.779565192   11.928 11.001     ~ 12 0
24 CD-25 4253 * 07 14 24.2872555704 -25 41 30.473911932   12.86 11.73     ~ 15 0
25 NGC 2355 OpC 07 16 59.1 +13 46 09     9.7     ~ 127 0
26 NGC 2423 OpC 07 37 11.3 -13 51 45           ~ 175 0
27 Cl* Melotte 71 MMU 121 * 07 37 29.9573315112 -12 02 22.901550792   13.825 12.800     ~ 11 0
28 Cl* Melotte 71 MMU 130 * 07 37 30.0521376696 -12 04 23.530297008   13.786 12.687     ~ 13 0
29 Cl Melotte 71 OpC 07 37 31.3 -12 03 42   7.44 7.1     ~ 149 0
30 Cl* Melotte 71 MMU 23 * 07 37 42.4219976640 -12 04 54.559294572   11.75 10.78     ~ 10 0
31 2MASS J07374269-1207058 RG* 07 37 42.6950815368 -12 07 05.903456088   12.68 11.880     ~ 27 0
32 Cl* Melotte 71 HAS 3 * 07 37 57.7891920408 -12 06 39.475029276   12.97 12.140     ~ 9 0
33 NGC 2477 991 RB? 07 51 47.0434768992 -38 33 53.371889100   12.55 11.39     ~ 22 0
34 CD-38 3745 MS* 07 51 56.0037312984 -38 36 50.472131508   11.814 10.853     ~ 20 0
35 NGC 2477 OpC 07 52 11.4 -38 32 47   6.64 5.8     ~ 314 0
36 CD-38 3754 RB? 07 52 17.8470598896 -38 33 24.913229976   11.988 10.811     G8II 29 0
37 NGC 2506 3254 * 07 59 54.9267810480 -10 47 03.140116476   12.54 11.12   11.91 ~ 9 0
38 NGC 2506 OpC 08 00 02.3 -10 46 22   8.28 7.6     ~ 313 0
39 NGC 2506 2212 RB? 08 00 08.6771437008 -10 46 37.388330616   13.02 11.9   10.26 ~ 23 0
40 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
41 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
42 NGC 2818 3035 * 09 15 54.2675893944 -36 30 50.242348656   14.381 13.346     ~ 10 0
43 NGC 2818 OpC 09 16 10.8 -36 37 09           ~ 108 1
44 HD 298541 * 09 32 54.8464151088 -53 27 34.958949444   10.67 9.94     F5 10 0
45 NGC 2925 OpC 09 33 15.7 -53 24 39     8.3     ~ 80 0
46 HD 298542 * 09 33 18.1343790816 -53 27 24.976275408   10.923 9.894     F0 8 0
47 NGC 2972 3 * 09 40 11.9809818216 -50 20 01.122827964   13.38 12.12     ~ 9 0
48 NGC 2972 OpC 09 40 14.1 -50 19 36   10.72 9.9     ~ 65 0
49 NGC 2972 11 * 09 40 16.5578449560 -50 19 23.817480996   13.37 12.09     ~ 9 0
50 HD 87109 * 10 00 54.3327938808 -60 13 34.349481948   8.95 7.69     G8Ib/II 50 0
51 HD 304864 * 10 01 03.4534897200 -60 17 35.648838312   8.88 7.68     G5 31 1
52 NGC 3114 OpC 10 01 55.0 -60 02 16   4.47 4.2     ~ 213 0
53 HD 304859 * 10 02 57.1933495368 -60 14 22.769741148   9.82 8.49     K2 22 0
54 HD 87479 * 10 03 21.0890376072 -59 56 53.657333484   9.12 8.00     G5III 33 0
55 HD 87526 * 10 03 38.9749008744 -60 11 59.367431868   8.20 7.32     G0II 46 0
56 HD 87566 * 10 03 51.4943107536 -60 03 10.214049996   9.55 8.31     K1III 35 0
57 HD 87833 * 10 05 44.0902923984 -60 19 01.000791372   9.69 8.56     G8II/III 39 1
58 HD 95879 * 11 02 50.6037869376 -58 42 07.027505532   8.854 7.869 7.360 6.925 G8III 43 0
59 NGC 3532 OpC 11 05 33.9 -58 42 13           ~ 414 0
60 CPD-58 3077 * 11 05 45.6255877152 -58 40 39.418236120   9.130 8.189 7.671 7.182 G6III 34 0
61 HD 96445 * 11 05 58.7377615560 -58 43 29.386550208   8.677 7.702 7.200 6.747 G6II-III 41 0
62 CPD-58 3092 * 11 06 03.8390336712 -58 41 15.835743780   8.577 7.457 6.925 6.424 G9III 34 0
63 HD 96544 V* 11 06 29.2872551400 -58 40 30.086655600   7.31 6.03     K2II/III 44 0
64 HD 96789 * 11 07 57.3479444448 -58 17 26.366354556   8.350 6.978 6.374 5.757 K2II 39 0
65 IC 2714 190 * 11 16 48.9045959832 -62 43 43.496707332   12.41 11.32     ~ 15 0
66 IC 2714 5 * 11 17 21.8771679648 -62 49 45.817741128   12.20 11.10     ~ 20 0
67 IC 2714 110 * 11 17 30.5748059376 -62 42 27.318268728   12.73 11.73     ~ 19 0
68 IC 2714 OpC 11 17 30.9 -62 43 09     8.2     ~ 110 0
69 IC 2714 121 * 11 17 31.1586029160 -62 43 19.509066048   12.06 10.80     ~ 17 0
70 CPD-62 1958 * 11 17 31.8381153384 -62 44 42.354475260   11.95 11.04     ~ 14 0
71 CPD-62 1960 * 11 17 35.2177606944 -62 43 44.723869320   12.12 11.13     ~ 14 0
72 IC 2714 87 * 11 17 46.8476688864 -62 36 49.492415592   12.602 11.395     ~ 25 0
73 IC 2714 53 * 11 18 15.8550088104 -62 42 03.928323564   12.796 11.522     ~ 17 0
74 CD-42 6963 * 11 25 16.1744004384 -43 14 24.079251516   11.93 10.78     ~ 50 0
75 NGC 3680 OpC 11 25 19.8 -43 14 38   8.40 7.6     ~ 340 0
76 CD-42 6977 * 11 25 38.0643019800 -43 16 06.379106556   12.1 10.8     ~ 45 0
77 CD-42 6976 MS* 11 25 38.6652469728 -43 13 58.792503612   11.56 10.69     G0V 41 0
78 CD-42 6981 * 11 25 48.5315765064 -43 09 52.530808176   12.043 10.886 10.08 9.829 ~ 65 0
79 CD-42 6983 * 11 25 49.9058331792 -43 12 15.712705908   11.3 10.02     K0III 43 0
80 NGC 3680 53 * 11 26 36.4327300968 -43 15 13.920198264   11.8 10.7     K1IV 38 0
81 NGC 3960 28 * 11 50 26.7644632512 -55 40 28.208115516   14.21 13.01     ~ 19 0
82 NGC 3960 OpC 11 50 36.4 -55 40 40   9.07 8.3     ~ 152 0
83 NGC 3960 44 * 11 50 37.3438774680 -55 41 02.900203944   13.87 12.67     ~ 9 0
84 NGC 4349 5 * 12 23 45.4987367544 -61 52 15.531318048   12.846 11.511     ~ 19 0
85 NGC 4349 53 * 12 23 46.0976991888 -61 54 36.174977604   12.45 11.33     ~ 8 0
86 NGC 4349 9 * 12 23 46.8795265680 -61 50 55.966453224   12.925 11.594     ~ 13 0
87 NGC 4349 OpC 12 24 14.1 -61 52 11   8.01 7.4     ~ 124 0
88 CD-53 5815 * 15 02 54.1051176408 -54 12 51.500033784 12.01 10.94 9.72     ~ 26 0
89 Cl* NGC 5822 MMU 348 * 15 03 00.4686830640 -54 28 17.643958896   12.04 10.97     ~ 18 0
90 CD-53 5820 * 15 03 15.8333959824 -54 16 39.167262732 12.01 10.91 9.69     ~ 24 0
91 Cl* NGC 5822 MMU 224 * 15 03 22.8542829960 -54 26 32.861730804 12.579 11.52 10.84     ~ 25 0
92 NGC 5822 87 * 15 03 49.4167331160 -54 20 10.602411612 12.61 11.88 10.84 10.285   ~ 33 0
93 CD-53 5829 * 15 03 50.0100652272 -54 14 30.313520772 11.97 11.33 10.26     ~ 31 0
94 HD 132944 * 15 04 02.2509606456 -54 20 21.053959332 11.54 10.36 9.08 8.387   G8/K1(III) 42 0
95 NGC 5822 OpC 15 04 08.3 -54 21 52           ~ 238 0
96 NGC 5822 6 * 15 04 21.2481969024 -54 23 05.624212416 12.50 11.80 10.78     ~ 22 0
97 CD-54 6003 * 15 04 30.3797958024 -54 31 44.812346808 12.11 10.80 9.47     ~ 28 0
98 CD-54 6002 * 15 04 30.5182328328 -54 35 48.846190632   11.51 10.47     ~ 30 0
99 CPD-53 6243 * 15 04 39.4239264528 -54 21 04.106654280 12.20 11.43 10.37 9.820   ~ 33 0
100 CD-53 6474 s*r 16 12 56.9036999088 -54 13 13.513528128   10.595 8.753 9.15   K2Ib 39 0
101 NGC 6067 OpC 16 13 10.2 -54 13 48           ~ 239 0
102 NGC 6067 298 * 16 13 18.4716565752 -54 14 04.065973152       9.41   A5II 28 0
103 HD 145415 ** 16 13 35.670936 -54 07 36.44616       9.21   B3 13 0
104 NGC 6134 62 RB? 16 27 36.0181608144 -49 09 56.163243456   13.204 11.892     ~ 14 0
105 NGC 6134 75 RB? 16 27 42.2754818304 -49 06 36.165240468   13.678 12.394     ~ 21 0
106 NGC 6134 129 RB? 16 27 46.0757406840 -49 05 29.618272248   13.41 12.53     ~ 25 0
107 NGC 6134 OpC 16 27 48.5 -49 09 40   7.89 7.2     ~ 166 0
108 NGC 6208 OpC 16 49 20.5 -53 43 27   8.06 7.2     ~ 94 0
109 NGC 6208 31 * 16 49 20.5348251192 -53 42 15.684360408   12.77 11.60     ~ 12 0
110 NGC 6208 19 * 16 49 25.1093385600 -53 42 48.736022328   11.99 11.22 10.84   K0/K1III/IV 13 0
111 HD 322658 * 17 04 35.9743761504 -37 59 31.050945060   9.27 8.16     K 42 0
112 NGC 6281 OpC 17 04 44.6 -37 57 08           ~ 156 0
113 HD 322660 * 17 04 47.5386458304 -37 53 14.732713824   9.04 7.94     G 32 0
114 CD-49 11399 * 17 24 33.4011541224 -49 54 56.091318048   11.79 10.44     ~ 29 0
115 CD-49 11401 * 17 24 41.5351328856 -49 59 06.472009932   11.401 10.363     ~ 47 0
116 CD-49 11402 * 17 24 46.7176119264 -49 54 06.987841164   12.027 10.894     ~ 47 0
117 IC 4651 OpC 17 24 48.5 -49 55 23           ~ 374 0
118 IC 4651 29 * 17 24 49.4898016320 -49 57 26.935027812   12.03 10.90     K0III 38 0
119 CD-49 11404 * 17 24 50.0710852992 -49 56 56.079791376   11.5 10.7     ~ 58 0
120 CD-49 11404b Pl 17 24 50.0710852992 -49 56 56.079791376           ~ 3 0
121 CD-49 11415 * 17 24 54.1498716864 -49 53 07.518967440   11.76 10.44     ~ 44 0
122 IC 4651 812 * 17 25 03.0270115512 -50 04 17.562097668   12.01 11.09     ~ 21 0
123 IC 4651 137 * 17 25 13.2150725040 -49 59 29.431690224   11.27 11.00     K0III 33 0
124 CD-31 14532 * 17 46 42.21 -31 27 35.2   11.85 10.69     ~ 6 0
125 NGC 6425 OpC 17 46 55.2 -31 29 57   7.90 7.2     ~ 75 0
126 CD-31 14549 * 17 47 04.1142188400 -31 33 20.504278728   12.009 10.788     ~ 14 0
127 HD 312343 * 17 56 23.0378988696 -19 08 58.659514116   10.84 9.54     K0 21 0
128 M 23 OpC 17 56 56.2 -18 58 21           ~ 144 0
129 BD-18 4710 * 17 57 03.1665412368 -18 59 13.932075768   10.71 9.42     ~ 15 0
130 NGC 6633 OpC 18 27 30.2 +06 38 21           ~ 423 0
131 HD 170174 RG* 18 27 54.7371519576 +06 36 00.341804160   9.39 8.31     G9IIIFe0.5: 88 0
132 HD 170231 RG* 18 28 00.1840379880 +06 54 51.426979884   9.72 8.69     G8IIb 59 0
133 BD+06 3796 * 18 28 17.6377551864 +06 46 00.033458880   9.96 8.98     G6IIIbFe-1 50 0
134 HD 170292 * 18 28 22.9728031560 +06 42 29.251388160   9.80 8.77     G6.5IIIFe-0.5CH0.5 56 0
135 BD+05 3805 * 18 35 47.4314134440 +05 20 17.105979624 10.39 10.57 9.54     G8 31 0
136 HD 171658 * 18 35 58.4613268896 +05 24 59.985225180 9.72 10.08 8.86     K5 38 0
137 BD+05 3818 * 18 36 33.2283499464 +05 12 42.780591540 9.83 10.28 9.01     K0 32 0
138 BD+05 3829 * 18 37 05.2144598832 +05 17 31.621063920 10.58 10.93 9.83     G5 51 0
139 BD+05 3833 * 18 37 20.7739949622 +05 53 43.109227904 10.08 10.43 9.46     G0 32 0
140 BD+05 3835 * 18 37 30.2982427272 +05 12 15.715653660 10.47 10.85 9.77     G5 43 0
141 BD+05 3839 * 18 37 34.2155606904 +05 28 33.420811116 10.30 10.50 9.46     ~ 48 0
142 BD+05 3840 * 18 37 35.8279260456 +05 15 37.811128716 9.44 9.43 8.06     K2 37 0
143 BD+05 3858 * 18 38 20.7633328128 +05 26 02.301879660 10.05 10.46 9.46     ~ 37 0
144 IC 4756 OpC 18 38 39.0 +05 26 14           ~ 274 0
145 BD+05 3868 * 18 38 43.7886124608 +05 14 19.935885012 10.05 10.38 9.36     G 46 0
146 BD+05 3873 * 18 38 52.9301191680 +05 20 16.508925924 9.93 10.10 9.05     K0 55 0
147 BD+05 3882 * 18 39 17.8751122128 +05 13 48.737856648 10.09 10.37 9.36     G0 48 0
148 BD+05 3906 * 18 40 18.5164988640 +05 18 51.727114368 10.08 10.35 9.27     G5 28 0
149 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0

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