2013ApJ...767..110P

Query : 2013ApJ...767..110P

2013ApJ...767..110P - Astrophys. J., 767, 110 (2013/April-3)

Dancing in the dark: new brown dwarf binaries from kernel phase interferometry.

POPE B., MARTINACHE F. and TUTHILL P.

Abstract (from CDS):

This paper revisits a sample of ultracool dwarfs in the solar neighborhood previously observed with the Hubble Space Telescope's NICMOS NIC1 instrument. We have applied a novel high angular resolution data analysis technique based on the extraction and fitting of kernel phases to archival data. This was found to deliver a dramatic improvement over earlier analysis methods, permitting a search for companions down to projected separations of ∼1 AU on NIC1 snapshot images. We reveal five new close binary candidates and present revised astrometry on previously known binaries, all of which were recovered with the technique. The new candidate binaries have sufficiently close separation to determine dynamical masses in a short-term observing campaign. We also present four marginal detections of objects which may be very close binaries or high-contrast companions. Including only confident detections within 19 pc, we report a binary fraction of at least εb = 17.2+5.7–3.7 . The results reported here provide new insights into the population of nearby ultracool binaries, while also offering an incisive case study of the benefits conferred by the kernel phase approach in the recovery of companions within a few resolution elements of the point-spread function core.

Abstract Copyright: ∼

Journal keyword(s): brown dwarfs - stars: formation - stars: low-mass - techniques: high angular resolution - techniques: image processing - techniques: interferometric

Simbad objects: 84

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Number of rows : 84
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 NAME L 362-29 BC BD* 00 04 34.8671722377 -40 44 06.463544237       19.61 16.88 L5+L5 119 0
2 V* DY Psc BY* 00 24 24.6317407560 -01 58 19.954412004     19.42 17.301 15.022 M9.5V 220 1
3 2MASSI J0025036+475919 BD* 00 25 03.65928 +47 59 19.1868           L4: 25 0
4 LSPM J0036+1821 BD* 00 36 16.1118891182 +18 21 10.286665966       18.451 16.053 L3.5 230 0
5 2MASS J00452143+1634446 BD* 00 45 21.4152609704 +16 34 44.736014164           L2beta 88 0
6 2MASS J01075242+0041563 BD* 01 07 52.42200 +00 41 56.3964           L8 64 0
7 2MASSW J0109216+294925 LM* 01 09 21.8736923288 +29 49 26.438975019           M9.5 22 0
8 SSSPM J0124-4240 BD* 01 23 59.0684407344 -42 40 07.179073284   18.0 19.0 19.41 16.28 L0.5 18 0
9 SIPS J0147-4954 LM* 01 47 32.8099692192 -49 54 47.920962312           M8+L2 16 0
10 2MASS J01550354+0950003 BD* 01 55 03.5501844443 +09 50 00.395365641           L4 26 0
11 2MASS J02132880+4444453 BD* 02 13 28.7932328280 +44 44 45.217640112           L1.5 30 0
12 2MASS J02284243+1639329 LM* 02 28 42.4417216093 +16 39 32.986136599           M8.7V 22 0
13 2MASS J02511490-0352459 BD* 02 51 14.9989090169 -03 52 48.074798290       18.851 16.509 L3 40 0
14 DENIS J025503.3-470049 BD* 02 55 03.6927058871 -47 00 51.356903955     22.921 19.906 17.454 L9 170 0
15 2MASS J03140344+1603056 BD* 03 14 03.4425221520 +16 03 05.472278460           L0 42 0
16 2MASSI J0318540-342129 BD* 03 18 54.0760885341 -34 21 29.084072887           L7 33 0
17 2MASS J03552337+1133437 BD* 03 55 23.3735910810 +11 33 43.797034332           L5gamma 142 0
18 V* FU Tau Or* 04 23 35.3912162592 +25 03 02.745522180           M7.25 88 0
19 RX J0429.3-3124 LM* 04 29 18.4672536672 -31 23 56.743066104       16.2   M5.0Ve 36 0
20 2MASS J04390101-2353083 BD* 04 39 01.0048450008 -23 53 08.495187288           L4.5 50 0
21 EM* LkCa 15 Or* 04 39 17.7911622816 +22 21 03.390090984   13.01 12.03 11.61   K5:Ve 792 1
22 2MASSI J0443376+000205 LM* 04 43 37.6085840376 +00 02 05.106068520     19.6   15.877 M9.0V 72 0
23 2MASS J04455387-3048204 BD* 04 45 53.8961437699 -30 48 20.648826383           L2 37 0
24 2MASS J05002100+0330501 BD* 05 00 21.0116447403 +03 30 50.081620281           L4pec 51 0
25 2MASS J05233822-1403022 BD* 05 23 38.2236232872 -14 03 02.017758240           L2.5 75 0
26 2MASS J06244595-4521548 BD* 06 24 45.9449286065 -45 21 54.758014875         18.32 L6.5 54 0
27 2MASS J06523073+4710348 BD* 06 52 30.7182715296 +47 10 34.926594456           L5.0 50 0
28 2MASS J07003664+3157266 BD* 07 00 36.7233300485 +31 57 25.462866965           L3+L6.5 52 0
29 LSPM J0746+2000 BD* 07 46 42.56207 +20 00 32.1839       17.9 15.034 L0+L1.5 201 1
30 2MASSI J0825196+211552 BD* 08 25 19.6125672818 +21 15 51.549358145       21.97 19.22 L7.5V 138 0
31 2MASS J08300825+4828482 BD* 08 30 08.1496038211 +48 28 47.538657498           L9.5 53 0
32 2MASS J08354256-0819237 BD* 08 35 42.5314423948 -08 19 23.372129099           L6.5 81 0
33 SIPS J0847-1532 BD* 08 47 28.7413750872 -15 32 37.370330484           L1.5 44 0
34 2MASSI J0859254-194926 BD* 08 59 25.47840 -19 49 26.8860           L8 23 0
35 2MASS J09083803+5032088 BD* 09 08 38.0091771633 +50 32 08.205341214           L8 54 0
36 2MASS J09111297+7401081 BD* 09 11 12.9672916656 +74 01 08.135608260           L0 21 0
37 2MASS J09153413+0422045 BD* 09 15 34.13712 +04 22 04.5948           L6 42 0
38 SIPS J0921-2104 BD* 09 21 14.1068893303 -21 04 44.417691256         16.50 L1 54 0
39 2MASS J10224821+5825453 BD* 10 22 48.2210814019 +58 25 45.392929526           L0.6V 54 0
40 2MASS J10255227+3212349 BD* 10 25 52.27584 +32 12 34.9956           L9 20 0
41 2MASSI J1043075+222523 BD* 10 43 07.58328 +22 25 23.6100           L8.5 37 0
42 2MASS J10452400-0149576 BD* 10 45 23.9815317869 -01 49 57.762869076       18.797 16.509 L1 51 0
43 LSPM J1048+0111 BD* 10 48 42.8144208091 +01 11 58.221081965       19.4   L1 64 0
44 2MASS J10511900+5613086 BD* 10 51 18.9925605455 +56 13 08.676242585           L2 28 0
45 SIPS J1058-1548 BD* 10 58 47.8366017792 -15 48 17.250428304       20.095 17.764 L3V 111 2
46 2MASS J11040127+1959217 BD* 11 04 01.2774943824 +19 59 21.714139176           L4 50 0
47 LSPM J1108+6830 BD* 11 08 30.7737005711 +68 30 16.720164401       19.3 16.6 L1e 42 0
48 2MASS J11553952-3727350 BD* 11 55 39.5361849740 -37 27 35.503012522           L2e 47 0
49 V* T Cha Or* 11 57 13.5245085552 -79 21 31.530508884   10.00 11.86     K0e 304 1
50 2MASS J12035812+0015500 BD* 12 03 58.1345813415 +00 15 50.101214352           L5.0V 47 1
51 2MASS J12130336-0432437 BD* 12 13 03.3425411711 -04 32 43.748365858           L4.2V 33 0
52 2MASS J12212770+0257198 BD* 12 21 27.7124211648 +02 57 19.767907440           L0.5 51 0
53 2MASSI J1300425+191235 BD* 13 00 42.5082106014 +19 12 34.598653499         15.9 L1.7V 64 0
54 2MASSW J1421314+182740 BD* 14 21 31.4165076452 +18 27 40.515517221           L0.0 31 0
55 2MASS J14252798-3650229 BD* 14 25 27.9845344257 -36 50 23.248617541           L4 61 1
56 2MASS J14283132+5923354 BD* 14 28 31.3087124280 +59 23 35.426100264           L4.4V 29 0
57 2MASS J14392836+1929149 BD* 14 39 28.1499428599 +19 29 15.908790370           L1V 145 0
58 2MASS J14482563+1031590 BD* 14 48 25.6387285440 +10 31 59.065957704   24.79 23.31     L5.5 37 1
59 2MASSW J1506544+132106 BD* 15 06 54.3299045806 +13 21 06.039351151           L3 116 0
60 2MASSW J1507476-162738 BD* 15 07 47.6758255542 -16 27 40.113982846     22.136 18.928 16.579 L5V 216 0
61 2MASSW J1515008+484742 BD* 15 15 00.8530443491 +48 47 41.289697100           L6.5 73 0
62 2MASS J15394189-0520428 BD* 15 39 41.9238250231 -05 20 42.754120152         17.47 L4.2V 48 1
63 2MASS J15525906+2948485 BD* 15 52 59.0614076832 +29 48 48.581774604           L0e 45 0
64 LSPM J1658+7027 BD* 16 58 03.8028228991 +70 27 01.695233449       19.0   L1(e) 44 0
65 2MASS J17054834-0516462 BD* 17 05 48.3505962528 -05 16 46.349087556         16.55 L1 55 1
66 2MASS J17072343-0558249 ** 17 07 23.43528 -05 58 24.9204       18.9 15.38 M9+L3 36 0
67 2MASSI J1721039+334415 BD* 17 21 03.6331191396 +33 44 16.932522500           L5.3:V 49 0
68 LSPM J1731+2721 BD* 17 31 29.7424777776 +27 21 23.240407320   20.1   17.6 14.9 L1.0 56 0
69 SIPS J1753-6559 BD* 17 53 45.1859814950 -65 59 55.666877515         17.80 L4 36 0
70 2MASS J18071593+5015316 BD* 18 07 15.9375533592 +50 15 31.636789740           L1 54 0
71 SIPS J1936-5502 BD* 19 36 01.8856788584 -55 02 32.189687017           L4 22 0
72 2MASSI J2002507-052152 BD* 20 02 50.7115352376 -05 21 52.556536728           L5.5 43 0
73 2MASS J20282035+0052265 BD* 20 28 20.3489639184 +00 52 26.588682516           L2.5 43 0
74 Wolf 1084 SB* 20 43 19.2623811502 +55 20 53.100443210   16.46   13.9   M5Ve 94 0
75 2MASS J20575409-0252302 BD* 20 57 54.0936475128 -02 52 30.247487652           L1 71 0
76 2MASS J21041491-1037369 BD* 21 04 14.9650401063 -10 37 37.351594861           L2 58 0
77 2MASSW J2148162+400359 BD* 21 48 16.2986589335 +40 03 59.331851811           L7 80 0
78 2MASS J21522609+0937575 BD* 21 52 26.09064 +09 37 57.5328           L6+L6 25 0
79 2MASSW J2224438-015852 BD* 22 24 43.8544128559 -01 58 53.284975671           L4.5V 150 0
80 G 216-7B LM* 22 37 32.5521252189 +39 22 39.327230643       19.2   M9.5 33 0
81 2MASS J22521073-1730134 BD* 22 52 10.7512306563 -17 30 13.889743018         17.9 L4.5+T3.5 64 1
82 SIPS J2255-5713 BD* 22 55 18.5785255822 -57 13 06.200631761       20.58   L6:+L8 24 0
83 2MASSI J2325453+425148 BD* 23 25 45.3034346736 +42 51 48.360303216           L8 30 0
84 SSSPM J2352-2538 LM* 23 51 50.4633005025 -25 37 36.861356975           M9e 50 0

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