2013MNRAS.431.2745G

Query : 2013MNRAS.431.2745G

2013MNRAS.431.2745G - Mon. Not. R. Astron. Soc., 431, 2745-2755 (2013/May-3)

Two new ultracool benchmark systems from WISE+2MASS.

GOMES J.I., PINFIELD D.J., MAROCCO F., DAY-JONES A.C., BURNINGHAM B., ZHANG Z.H., JONES H.R.A., VAN SPAANDONK L. and WEIGHTS D.

Abstract (from CDS):

We have used the Two-Micron All-Sky Survey and the Wide-field Infrared Survey Explorer to look for ultracool dwarfs that are part of multiple systems containing main-sequence stars. We cross-matched L dwarf candidates from the surveys with Hipparcos and Gliese stars, finding two new systems. The first system, G255-34AB, is an L2 dwarf companion to a K8 star, at a distance of 36 pc. We estimate its bolometric luminosity as log L/L☉ = -3.78 ± 0.045 and Teff = 2080±260 K. The second system, GJ499ABC, is a triple, with an L5 dwarf as a companion to a binary with an M4 and K5 star. These two new systems bring the number of L dwarf plus main-sequence star multiple systems to 24, which we discuss. We consider the binary fraction for L dwarfs and main-sequence stars, and further assess possible unresolved multiplicity within the full companion sample. This analysis shows that some of the L dwarfs in this sample might actually be unresolved binaries themselves, since their MJ appears to be brighter than the expected for their spectral types.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): surveys - brown dwarfs - stars: low-mass

CDS comments: 2MASP J034532+254023 is a probable misprint for 2MASP J0345432+254023.

Simbad objects: 66

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Number of rows : 66
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 L 362-29 PM* 00 04 36.4375346731 -40 44 02.880162313   14.47 12.84 12.525   M4V 88 0
2 HD 2057 SB* 00 25 08.7533927840 +48 02 50.650246875 8.270 8.120   7.1   F8 58 0
3 SIPS J0031-6308 LM* 00 31 42.9272761680 -63 08 18.613134168           ~ 5 1
4 CD-63 9 PM* 00 32 15.4210030914 -63 05 28.535779107   10.99 9.72     K7V 33 0
5 LP 465-70 PM* 00 41 55.4453006208 +13 41 16.577295828   15.45   13.0   M4 22 0
6 G 3-40 PM* 02 07 37.4828013797 +13 54 49.387258374   13.97   12.100   M2.1 25 0
7 2MASS J02212859-6831400 LM* 02 21 28.6368354312 -68 31 40.171910952         16.96 M8: 11 0
8 * del Hyi PM* 02 21 44.9423652192 -68 39 33.906922488 4.17 4.12 4.09 4.05 4.04 A2V 119 0
9 HD 16270B BD* 02 35 59.9394221640 -23 31 20.410151736           L1.5 49 0
10 HD 16270 PM* 02 36 00.7758029064 -23 31 16.765791636 10.375 9.406 8.328 7.717 7.208 K3.5Vk: 82 0
11 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
12 Cl* Melotte 22 KPNO 2 BD* 03 45 43.1616128256 +25 40 23.239779672         17.36 L0V 136 0
13 HD 44627 Er* 06 19 12.9130449912 -58 03 15.527294208   10.01 9.205   8.185 K1V(e) 207 1
14 L 182-44 PM* 06 33 49.9711873177 -58 31 42.450688727 14.322 13.11 11.57 11.22 9.22 M2.5V 75 0
15 2MASS J06344773-5829553 PM* 06 34 47.730 -58 29 55.30           ~ 1 1
16 HD 49197 PM* 06 49 21.3348720432 +43 45 32.779840536   7.82 7.32     F5 49 0
17 2MASS J07105138-4922122 LM* 07 10 51.3902844624 -49 22 12.233365824           ~ 3 1
18 HD 55720 PM* 07 11 31.6674204568 -49 25 27.136633751   8.24 7.47     G8V 88 0
19 V* YY Gem SB* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 882 0
20 2MASS J07352319+3150506 * 07 35 23.2052888688 +31 50 50.637630552           ~ 1 1
21 2MASS J07423127+1808168 LM* 07 42 31.2765034248 +18 08 16.670784948           M9V 8 0
22 BD+18 1719 PM* 07 43 11.7329334402 +18 10 42.320521368   12.643 11.289 10.850   M1.5V 40 0
23 2MASSW J0832045-012835 BD* 08 32 04.5196565736 -01 28 36.042229668           L1.5V 36 0
24 LP 605-23 PM* 08 32 30.4836775707 -01 34 38.551452575   20.2 18.44     M6Ve 44 0
25 * pi.01 Cnc SB* 09 12 17.5474052342 +14 59 45.776204103 7.49 7.24 6.51 5.90 5.52 G9V 234 0
26 LP 261-75 LM* 09 51 04.5755715720 +35 58 09.461810208   16.940 15.436 14.713   M4.5Ve 60 1
27 LP 261-75 B BD* 09 51 05.49288 +35 58 02.1288           L6V 71 0
28 G 196-3B BD* 10 04 20.6391105792 +50 22 59.378638152           L3beta 115 0
29 G 196-3 PM* 10 04 21.4627410744 +50 23 13.386435576       11.323   M3.0V 90 0
30 2MASS J10042824-1146489 ** 10 04 28.2259309536 -11 46 49.004493168         18.021 ~ 9 2
31 HD 87424 BY* 10 04 37.6589333352 -11 43 46.919496972 9.643 9.075 8.149 8.78 7.173 K2Vk: 82 0
32 HD 89744 PM* 10 22 10.5618854376 +41 13 46.309698444   6.25 5.72     F7V 360 1
33 SIPS J1058-1548 BD* 10 58 47.8366017792 -15 48 17.250428304       20.095 17.764 L3V 111 2
34 HD 97334 BY* 11 12 32.3503039560 +35 48 50.688978228   7.02 6.41     G2 306 0
35 LP 732-94 SB* 11 21 49.1708652037 -13 13 08.693807585     19.57     M8.5V 147 1
36 NAME Kelu-1 BD* 13 05 40.1642434199 -25 41 05.712165150         16.85 L2+L3.5 267 0
37 2MASS J13054106+2046394 BD* 13 05 41.0625633744 +20 46 39.446834736           L5 23 0
38 BD+21 2486B PM* 13 06 15.3491331288 +20 43 44.330954232           M4 29 0
39 BD+21 2486A PM* 13 06 15.3969024600 +20 43 45.298951428   11.39 9.72     ~ 50 0
40 BD+21 2486 ** 13 06 15.39818 +20 43 45.2749 11.909 10.715 9.398 8.575 7.823 K4V 79 0
41 HD 116012 PM* 13 20 43.7752667238 +04 07 58.605889318   9.53   8.0   K0V 80 0
42 HD 116012B BD* 13 20 44.2866018228 +04 09 04.577880008         19.89 L2.5V 22 0
43 * zet02 UMa SB* 13 23 56.3219129760 +54 55 18.513775632   4.05 3.88     kA1h(eA)mA7IV-V 188 0
44 2MASS J13243495+5456152 * 13 24 34.9315427688 +54 56 15.167552676           ~ 1 1
45 BD+75 510 PM* 13 32 41.0148971364 +75 00 24.805212562       9.782   M0V 63 0
46 2MASS J13324530+7459441 BD* 13 32 45.2724239456 +74 59 44.259770781           L2 8 0
47 LAWD 52 WD* 13 38 50.4780906644 +70 17 07.640657534 11.807 12.54 12.60 13.01 12.979 DA2.4 234 0
48 2MASS J13415414-0145531 LM* 13 41 54.1435353072 -01 45 53.131206168           M9V 8 1
49 HD 119291 PM* 13 42 26.0344810267 -01 41 10.575992946 11.608 10.42 9.210 8.497 9.01 K7V 89 0
50 2MASS J13475179-1044337 BD? 13 47 51.7823922504 -10 44 33.788263164           ~ 3 0
51 HD 120205 PM* 13 48 10.0572612888 -10 47 19.504434192   9.18 8.336   7.457 K0V 44 0
52 HD 125141 PM* 14 16 05.3263698611 +50 10 09.281772834       7.4   G5 47 0
53 2MASS J14392836+1929149 BD* 14 39 28.1499428599 +19 29 15.908790370           L1V 145 0
54 G 124-62 PM* 14 41 35.8329036192 -09 46 38.701925184   12.58 11.80 12.33   dM4.5e 26 0
55 DENIS J144137.2-094558 BD* 14 41 37.1567200536 -09 45 59.229849096       20.030 17.234 L1+L1 61 0
56 G 239-25 PM* 14 42 21.5756362789 +66 03 20.844850251   12.43 10.708 10.383   M3V 89 0
57 HD 130948 BY* 14 50 15.8109853464 +23 54 42.634220112   6.456 5.867     F9IV-V 306 0
58 * eta CrB A * 15 23 12.230856 +30 17 17.56212   6.123 5.577     G2V 237 0
59 V* GQ Lup B LM* 15 49 12.05 -35 39 05.1           M9e 165 1
60 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 334 1
61 MCC 760 PM* 16 20 24.7810787707 -04 16 02.298205844   12.09 10.708 10.347   M0V 69 0
62 G 203-50 PM* 17 11 46.0844100288 +40 29 01.529198160   17.4   15.3   M4.5Ve 25 0
63 2MASS J19053628-3705463 * 19 05 36.2887788840 -37 05 46.403207088           ~ 1 1
64 * gam CrA B PM* 19 06 25.1022191999 -37 03 49.332880204   7.06 6.42     F8/G1 46 0
65 HD 203030 BY* 21 18 58.2195697224 +26 13 49.960929036   9.206 8.426 8.79   K0V 102 0
66 HD 203030B BD* 21 18 58.97 +26 13 46.1           L7.5 77 0

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