2014AJ....148..129A

Query : 2014AJ....148..129A

2014AJ....148..129A - Astron. J., 148, 129 (2014/December-0)

Constraints on the binary properties of mid- to late T dwarfs from Hubble Space Telescope WFC3 observations.

ABERASTURI M., BURGASSER A.J., MORA A., SOLANO E., MARTIN E.L., REID I.N. and LOOPER D.

Abstract (from CDS):

We used Hubble Space Telescope/Wide Field Camera 3 (WFC3) observations of a sample of 26 nearby ( ≤ 20 pc) mid- to late T dwarfs to search for cooler companions and measure the multiplicity statistics of brown dwarfs (BDs). Tightly separated companions were searched for using a double point-spread-function-fitting algorithm. We also compared our detection limits based on simulations to other prior T5+ BD binary programs. No new wide or tight companions were identified, which is consistent with the number of known T5+ binary systems and the resolution limits of WFC3. We use our results to add new constraints to the binary fraction (BF) of T-type BDs. Modeling selection effects and adopting previously derived separation and mass ratio distributions, we find an upper limit total BF of <16% and <25% assuming power law and flat mass ratio distributions, respectively, which are consistent with previous results. We also characterize a handful of targets around the L/T transition.

Abstract Copyright: ∼

Journal keyword(s): binaries: general - brown dwarfs - methods: observational - stars: low-mass - techniques: photometric

CDS comments: Misprints: 2MASS J1553-1532 = 2MASS J1553+1532, WISE J0458+6634 = WISE J0458+6434.

Simbad objects: 56

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Number of rows : 56
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 CFBDS J003402-005206 BD* 00 34 02.77416 -00 52 06.8196           T8+/Y? 49 0
2 * 54 Psc B BD* 00 39 18.91 +21 15 16.8           T7.5 76 1
3 2MASS J00501994-3322402 BD* 00 50 19.94352 -33 22 40.2708           T7 39 0
4 2MASS J03255322+0425406 BD* 03 25 53.22288 +04 25 40.6920           T5.5 18 0
5 2MASS J03400942-6724051 BD* 03 40 09.3513800352 -67 24 04.439306050           L7:: 12 0
6 2MASS J04070885+1514565 BD* 04 07 08.85480 +15 14 56.5980           T5.5 18 0
7 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 165 0
8 WISE J045853.89+643452.5 BD* 04 58 53.89392 +64 34 52.5900           T8.5 25 0
9 2MASS J05103524-4208146 BD* 05 10 35.24352 -42 08 14.6580           T5 11 1
10 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 504 0
11 2MASSI J0727182+171001 BD* 07 27 18.24600 +17 10 01.2072           T7.0 91 0
12 2MASS J07290002-3954043 BD* 07 29 00.02496 -39 54 04.3992           T8pec 30 0
13 2MASS J07392203+6615039 BD* 07 39 22.03560 +66 15 03.9276           T1.5 7 0
14 2MASS J07414920+2351275 BD* 07 41 49.20936 +23 51 27.5076           T5 18 0
15 L 97-3 B BD* 08 07 14.675 -66 18 48.68           Y1 71 0
16 2MASS J09393548-2448279 BD* 09 39 35.48976 -24 48 27.9432           T8 59 0
17 2MASS J09490860-1545485 BD* 09 49 08.60280 -15 45 48.5244           T1.0+T2.0 22 0
18 2MASS J10073369-4555147 BD* 10 07 33.69888 -45 55 14.7108           T5 14 0
19 2MASS J10132597-7842551 BD* 10 13 25.9720307568 -78 42 55.141041312         17.352 L3 4 0
20 2MASS J11145133-2618235 BD* 11 14 51.33720 -26 18 23.5620           T7.5 42 0
21 2MASS J11220826-3512363 BD* 11 22 08.2584613608 -35 12 36.580608360           T2 24 0
22 DENIS J112639.9-500355 BD* 11 26 39.8047127039 -50 03 54.846166563         17.800 L5.5 46 0
23 2MASS J11463449+2230527 BD* 11 46 34.5341033040 +22 30 54.036482400           L3+L4 88 0
24 2MASS J12074717+0244249 BD* 12 07 47.17296 +02 44 24.9576           L6.5+T2.5 66 0
25 WISE J121756.90+162640.8 BD* 12 17 56.90808 +16 26 40.8372           T9+Y0 41 0
26 2MASS J12255432-2739466 BD* 12 25 54.32328 -27 39 46.6776           T5.5+T8 61 0
27 ULAS2MASS J1231+0847 BD* 12 31 47.53608 +08 47 33.1116           T6 34 0
28 ULAS J123828.51+095351.3 BD* 12 38 28.50864 +09 53 51.3636           T8.5(N) 17 0
29 2MASS J12501166+3925582 BD* 12 50 11.66856 +39 25 58.2060           T4.0 13 0
30 2MASS J13240776+1906271 BD* 13 24 07.76184 +19 06 27.1980           T3.5 6 0
31 2MASS J13464634-0031501 BD* 13 46 46.34496 -00 31 50.1312           T6 75 0
32 GD 165B BD* 14 24 39.09480 +09 17 10.4352         20.53 L4V 205 0
33 2MASS J14392836+1929149 BD* 14 39 28.1499428599 +19 29 15.908790370           L1V 131 0
34 SDSS J143945.86+304220.5 BD* 14 39 45.86232 +30 42 20.5524           T1.0+T5.0 8 0
35 NAME CFBDSIR 1458+1013B BD* 14 58 29.0 +10 13 43           T8+/Y? 24 1
36 CFBDS J145829+101343 ** 14 58 29.40072 +10 13 41.7108           T8+Y0 30 0
37 CFBDS J150411+102717 BD* 15 04 11.72688 +10 27 16.9128           T7.0 26 0
38 SDSS J151114.65+060742.9 BD* 15 11 14.66280 +06 07 43.1652           T2.0 35 0
39 ** BUG 12A BD* 15 20 02.1864914640 -44 22 42.547882153           L1.5 7 0
40 2MASS J15200224-4422419 ** 15 20 02.24160 -44 22 41.9880       19.4 16.89 L1.5+L4.5 22 0
41 ** BUG 12B BD* 15 20 02.2423947525 -44 22 41.431970211           L4.5 6 0
42 2MASSI J1534498-295227 BD* 15 34 49.84080 -29 52 27.4188           T4.5+T5 66 0
43 2MASS J15530228+1532369 BD* 15 53 02.28072 +15 32 36.9132           T6.5+T7.5 55 0
44 2MASS J16241436+0029158 BD* 16 24 14.36712 +00 29 15.8172           T6V 145 0
45 2MASS J16283855+2308241 BD* 16 28 38.55000 +23 08 24.1980           T7.0 20 0
46 WISE J171104.60+350036.8 BD* 17 11 04.60272 +35 00 36.8064           T8+T9.5 18 0
47 2MASS J17545447+1649196 BD* 17 54 54.47208 +16 49 19.6680           T5.5 8 0
48 SDSS J175805.46+463311.9 BD* 17 58 05.45496 +46 33 09.9108           T7 40 0
49 2MASS J18283572-4849046 BD* 18 28 35.72256 -48 49 04.6380           T6 26 0
50 2MASS J19010601+4718136 BD* 19 01 06.01920 +47 18 13.6620           T5 15 0
51 CFBDS J212413+010002 BD* 21 24 13.87968 +00 59 59.9172           T6 23 0
52 2MASS J21543318+5942187 BD* 21 54 33.18696 +59 42 18.7740           T6 15 0
53 2MASSW J2224438-015852 BD* 22 24 43.8544128559 -01 58 53.284975671           L4.5V 139 0
54 2MASS J22372056+7228351 BD* 22 37 20.56488 +72 28 35.1840           T6 8 0
55 2MASS J23312378-4718274 BD* 23 31 23.78712 -47 18 27.4356           T5 21 0
56 2MASS J23594034-7335055 BD* 23 59 40.34928 -73 35 05.5032           T5.5 8 0

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