2012ApJ...744..120E


Query : 2012ApJ...744..120E

2012ApJ...744..120E - Astrophys. J., 744, 120 (2012/January-2)

Mapping the shores of the brown dwarf desert. III. Young moving groups.

EVANS T.M., IRELAND M.J., KRAUS A.L., MARTINACHE F., STEWART P., TUTHILL P.G., LACOUR S., CARPENTER J.M. and HILLENBRAND L.A.

Abstract (from CDS):

We present the results of an aperture-masking interferometry survey for substellar companions around 67 members of the young (∼8-200 Myr) nearby (∼5-86 pc) AB Doradus, β Pictoris, Hercules-Lyra, TW Hya, and Tucana-Horologium stellar associations. Observations were made at near-infrared wavelengths between 1.2 and 3.8 µm using the adaptive optics facilities of the Keck II, Very Large Telescope UT4, and Palomar Hale Telescopes. Typical contrast ratios of ∼100-200 were achieved at angular separations between ∼40 and 320 mas, with our survey being 100% complete for companions with masses below ∼0.25 M across this range. We report the discovery of a 0.52±0.09 M companion to HIP 14807, as well as the detections and orbits of previously known stellar companions to HD 16760, HD 113449, and HD 160934. We show that the companion to HD 16760 is in a face-on orbit, resulting in an upward revision of its mass from M2 sin i ∼ 14 MJto M2= 0.28 ±0.04 M. No substellar companions were detected around any of our sample members, despite our ability to detect companions with masses below 80 MJ for 50 of our targets: of these, our sensitivity extended down to 40 MJ around 30 targets, with a subset of 22 subject to the still more stringent limit of 20 MJ. A statistical analysis of our non-detection of substellar companions allows us to place constraints on their frequency around ∼0.2-1.5 Mstars. In particular, considering companion mass distributions that have been proposed in the literature, we obtain an upper limit estimate of ∼9%-11% for the frequency of 20-80 MJcompanions between 3 and 30 AU at 95% confidence, assuming that their semimajor axes are distributed according to d{N}/da ∝a–1 in this range.

Abstract Copyright:

Journal keyword(s): binaries: general - brown dwarfs - stars: low-mass - stars: pre-main sequence

Simbad objects: 82

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Number of rows : 82
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 NAME THA As* 00 00 -62.0           ~ 433 0
2 HD 166 BY* 00 06 36.7840068588 +29 01 17.412693890   6.88   5.6   G8 335 1
3 HD 203 PM* 00 06 50.0863238088 -23 06 27.145662264   6.547 6.173   5.74 F3V 121 0
4 V* PW And RS* 00 18 20.8895755560 +30 57 22.129174872   9.78 8.86 8.3 7.78 K2V 115 1
5 HD 4277 * 00 45 50.8889516452 +54 58 40.201402716   8.35 7.81     F8V 56 0
6 HD 6569 PM* 01 06 26.1533050824 -14 17 47.105517192   10.35 9.52   8.55 K1V 55 0
7 BD-12 243 PM* 01 20 32.2680172224 -11 28 03.727949952   9.19 8.39     G9V 80 1
8 V* EX Cet BY* 01 37 35.4667815000 -06 45 37.529924796 8.862 8.459 7.656 7.218 6.817 K0/1V 124 0
9 V* DK Cet PM* 01 57 48.9775849512 -21 54 05.341104000   8.73 8.057   7.343 G4V 125 1
10 HD 14082 BY* 02 17 25.2869702592 +28 44 42.145069812   7.545 7.031 8.04   F5V 116 0
11 BD+30 397B PM* 02 27 28.0554707280 +30 58 40.362507732   14.05 12.55     K7 41 0
12 BD+30 397 PM* 02 27 29.2543096632 +30 58 24.596323968   11.3 10.12 9.32 8.78 K7V 98 1
13 BD+05 378 PM* 02 41 25.8882694248 +05 59 18.396173868   11.58 10.271   8.807 K6Ve 102 1
14 HD 16760B PM* 02 42 20.9504185128 +38 37 21.159114852   11.25 10.27     K2V 42 1
15 HD 16760 ** 02 42 21.3134499936 +38 37 07.231908072   9.45 8.76     G2V 81 1
16 HD 17332 ** 02 47 27.42146 +19 22 18.5443   7.55 6.87     G1V+G5V 96 0
17 V* IS Eri BY* 03 09 42.2876014080 -09 34 46.583173740   9.27 8.49   7.64 G8/K0V 92 0
18 BD+21 418B PM* 03 11 12.3210862222 +22 25 22.571229275   11.6 10.6     K3V 33 0
19 BD+21 418 PM* 03 11 13.8420908448 +22 24 57.113183340   9.14 8.51 8.61   G5 57 0
20 HD 21845 PM* 03 33 13.4905810704 +46 15 26.546978484   8.963 8.250 7.8 7.34 K2 85 0
21 HD 21845B PM* 03 33 14.0499344256 +46 15 18.978438636   11.4 13.09 10.5   K7V 35 0
22 G 80-21 Er* 03 47 23.3412414313 -01 58 19.947831323 14.052 13.048 11.537 10.452 9.098 M3.0V 109 0
23 HD 25457 TT* 04 02 36.7442719512 -00 16 08.119921152   5.88 5.38     F7V 255 0
24 HD 25953 PM* 04 06 41.5332077256 +01 41 02.078668860   8.32 7.82     F6V 57 1
25 Cl Melotte 25 OpC 04 29 47 +16 56.9           ~ 2910 0
26 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1312 0
27 * 51 Eri PM* 04 37 36.1326090888 -02 28 24.775726260   5.486 5.209     F0IV 215 0
28 EM* LkCa 15 Or* 04 39 17.7911622816 +22 21 03.390090984   13.01 12.03 11.61   K5:Ve 627 1
29 V* AF Lep RS* 05 27 04.7633281608 -11 54 03.466002240   6.832 6.295     F8V(n)k: 223 0
30 HD 233153 PM* 05 41 30.7306794471 +53 29 23.290604578   11.31   9.343   M1.0V 172 0
31 V* V1358 Ori BY* 06 19 08.0574987312 -03 26 20.361237864   8.52 7.95     G0V 102 0
32 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 437 0
33 BD+20 1790 BY* 07 23 43.5893479416 +20 24 58.650645816   11.08 10.001 9.43 8.522 K5e 87 0
34 BD+02 1729 PM* 07 39 23.0389345608 +02 11 01.193811648 12.328 11.055 9.589 8.683 7.777 M0.0V 123 0
35 V* V478 Hya BY* 08 22 49.9527726648 +01 51 33.552251064   9.30 8.711   7.999 G1/2V 95 2
36 HD 298936 PM* 10 13 14.7724609728 -52 30 54.001503468   10.81 9.763   8.687 K3Ve 56 0
37 V* BX Ant TT* 10 18 28.6987521312 -31 50 02.830052544   13.39 11.454 11.382 9.325 M0Ve 112 0
38 HD 89744 PM* 10 22 10.5618854376 +41 13 46.309698444       5.4   F7V 317 1
39 BD+01 2447 PM* 10 28 55.5512830314 +00 50 27.598904576 12.389 11.151 9.650 8.617 7.389 dM2 285 0
40 V* CE Ant TT* 10 42 30.1018928760 -33 40 16.229805204   12.21 10.91   9.10 M2Ve 184 1
41 V* V419 Hya BY* 10 43 28.2715703736 -29 03 51.432666948 9.144 8.596 7.719 7.232 6.806 K1V 163 0
42 Wolf 358 BY* 10 50 52.0312380389 +06 48 29.259617410 14.532 13.319 11.675 10.459 8.889 M4V 249 0
43 NAME TW Hya Association As* 11 01.9 -34 42           ~ 903 0
44 TWA 3 ** 11 10 27.894072 -37 31 51.96612   13.53 12.05 11.61 9.29 M4Ve+M4Ve 207 0
45 TWA 3A TT* 11 10 27.9121410480 -37 31 51.535547940   14.04 12.57   9.10 M4Ve 199 0
46 V* V1215 Cen TT* 11 13 26.2208680752 -45 23 42.720964188     12.478   10.483 K8IVe 77 0
47 CD-34 7390A TT* 11 21 17.2193334624 -34 46 45.503251608   12.88 11.46 11.43 9.57 M1Ve 93 0
48 CD-34 7390B TT* 11 21 17.4430606440 -34 46 49.775810700   13.43 11.96 11.31 9.88 M1Ve 65 0
49 CD-26 8623B TT* 11 32 41.1733260768 -26 52 09.107765976   16.70 15.22 13.68 11.76 M5.5 71 0
50 CD-26 8623 TT* 11 32 41.2658824800 -26 51 55.961893800   13.69 12.23 11.14 9.637 M3Ve 98 0
51 CD-36 7429A TT* 11 48 24.2227406904 -37 28 49.114270524   12.54 11.17 10.92 9.552 K5V 118 0
52 CD-36 7429 ** 11 48 24.22320 -37 28 49.1537           ~ 95 0
53 TWA 23 TT* 12 07 27.3763935312 -32 47 00.242923776   14.157 12.7     M2.5Ve 64 0
54 V* V1249 Cen TT* 12 15 30.7203201048 -39 48 42.606684144   13.09 11.160 10.919 9.50 M0.5 101 0
55 BD+08 2599 ** 12 25 58.57580 +08 03 44.0278   11.61   9.98   M0V 43 0
56 V* V1252 Cen TT* 12 35 04.2560376888 -41 36 38.616010560   14.39 13.045   10.506 M2Ve 76 0
57 HD 109573B Y*? 12 36 00.5491381248 -39 52 15.693558816         10.78 M2.5 81 0
58 HD 109573 PM* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774 7.25 5.81 A0V 601 1
59 V* PX Vir BY* 13 03 49.6546871 -05 09 42.517119 9.042 8.555 7.679 7.185 6.721 K1V 120 0
60 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 704 0
61 V* EK Dra BY* 14 39 00.2104038120 +64 17 29.979649860   8.243 7.604     G1.5V 420 0
62 HD 137763 SB* 15 28 09.6181427563 -09 20 52.759792118 8.163 7.704 6.883 6.425 6.009 G9V 137 0
63 NAME Upper Sco Association As* 16 12 -23.4           ~ 1236 1
64 LP 745-70 PM* 16 33 41.6097712464 -09 33 11.935611864   12.90 11.280 10.840 9.53 K9Vkee 55 0
65 HD 152555 PM* 16 54 08.1433547448 -04 20 24.661056912   8.42 7.82     F8/G0V 88 0
66 HD 160934B BD? 17 38 39.6 +61 14 16           M4 8 0
67 HD 160934 Er* 17 38 39.6170537492 +61 14 16.102424643   11.34 10.15   8.99 K7Ve 96 0
68 Wolf 1084 SB* 20 43 19.2623811502 +55 20 53.100443210   16.46   13.9   M5Ve 84 0
69 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1046 0
70 HD 199143 PM* 20 55 47.6748292416 -17 06 51.061731768   7.84 7.32 8.29   F8V 115 0
71 HD 358623 BY* 20 56 02.738688 -17 10 53.80428   11.603 10.625 10.18 8.847 K7 91 0
72 BD+22 4409 BY* 21 31 01.7140062576 +23 20 07.374015564   10.240 9.245 8.6 7.965 K3Vke 166 0
73 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 483 0
74 Wolf 1225 ** 22 23 29.09743 +32 27 33.9152       10.26   M3.0V 103 0
75 V* WW PsA BY* 22 44 57.9628374984 -33 15 01.744541676 14.583 13.627 12.111 10.916 9.109 M4IVe 108 1
76 V* TX PsA Er* 22 45 00.0641595504 -33 15 26.091533124   14.93 13.36 12.095 10.379 M5IVe 72 0
77 HD 217343 PM* 23 00 19.2868499184 -26 09 13.504347252   8.12 7.48   6.75 G5V 104 0
78 MCC 858 Er* 23 06 04.8465138840 +63 55 34.356579420   12.34 10.96 10.37 9.10 M0.3V 81 0
79 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1049 0
80 BD+41 4749 PM* 23 19 39.5615401608 +42 15 09.834862140   9.67 8.93     G0 40 1
81 HD 224228 PM* 23 56 10.6732330776 -39 03 08.409504852 9.977 9.21 8.225 7.669 7.194 K2V 78 0
82 NAME Hercules-Lyra Moving Group MGr ~ ~           ~ 62 0

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2022.11.30-18:32:23

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