2013AJ....145....2F

Query : 2013AJ....145....2F

2013AJ....145....2F - Astron. J., 145, 2 (2013/January-0)

2MASS J035523.37+113343.7: a young, dusty, nearby, isolated brown dwarf resembling a giant exoplanet.

FAHERTY J.K., RICE E.L., CRUZ K.L., MAMAJEK E.E. and NUNEZ A.

Abstract (from CDS):

We present parallax and proper motion measurements, near-infrared spectra, and Wide-field Infrared Survey Explorer photometry for the low surface gravity L5γ dwarf 2MASS J035523.37+113343.7 (2M0355). We use these data to evaluate photometric, spectral, and kinematic signatures of youth as 2M0355 is the reddest isolated L dwarf yet classified. We confirm its low-gravity spectral morphology and find a strong resemblance to the sharp triangular shaped H-band spectrum of the ∼10 Myr planetary-mass object 2M1207b. We find that 2M0355 is underluminous compared to a normal field L5 dwarf in the optical and Mauna Kea Observatory J, H, and K bands and transitions to being overluminous from 3 to 12 µm, indicating that enhanced photospheric dust shifts flux to longer wavelengths for young, low-gravity objects, creating a red spectral energy distribution. Investigating the near-infrared color-magnitude diagram for brown dwarfs confirms that 2M0355 is redder and underluminous compared to the known brown dwarf population, similar to the peculiarities of directly imaged exoplanets 2M1207b and HR8799bcd. We calculate UVW space velocities and find that the motion of 2M0355 is consistent with young disk objects (<2-3 Gyr) and it shows a high likelihood of membership in the AB Doradus association.

Abstract Copyright: ∼

Journal keyword(s): astrometry - brown dwarfs - stars: individual: 2MASS J035523.51+113343.7 (read: 2MASS J035523.37+113343.7) - stars: low-mass

CDS comments: In key words, 2MASS J035523.51+113343.7 is a misprint for 2MASS J035523.37+113343.7.

Simbad objects: 71

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Number of rows : 71
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 Tuc Moving Group MGr 00 00 -64.0           ~ 73 0
2 NAME THA MGr 00 00 -62.0           ~ 540 0
3 2MASS J00040288-6410358 BD* 00 04 03.0615921037 -64 10 36.668598809           L1gamma 11 0
4 EROS-MP J0032-4405 BD* 00 32 55.8475515840 -44 05 05.764029396         18.01 L0.5V 52 0
5 2MASS J00374306-5846229 BD* 00 37 43.0611060144 -58 46 22.829216448           L0gamma 17 0
6 2MASS J01244599-5745379 BD* 01 24 46.0774361904 -57 45 37.328704632           L0gamma 6 0
7 2MASS J01262109+1428057 BD* 01 26 21.09600 +14 28 05.7504           L2 12 0
8 2MASS J01415823-4633574 BD* 01 41 58.2329929560 -46 33 57.347594316           L0gamma 80 0
9 2MASS J02235464-5815067 BD* 02 23 54.6539799384 -58 15 06.632229960           L0gamma 20 0
10 2MASS J02340093-6442068 BD* 02 34 00.9357644784 -64 42 07.056543492           L0 17 0
11 2MASS J02411151-0326587 BD* 02 41 11.6085713131 -03 26 59.362883069           L0gamma 32 0
12 2MASS J03032042-7312300 BD* 03 03 20.42472 -73 12 30.0096           L2gamma 6 0
13 2MASS J03231002-4631237 BD* 03 23 10.0104896304 -46 31 23.582852868           L0gamma 25 0
14 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
15 Cl Alessi 13 OpC 03 27 32.7 -35 50 45           ~ 92 0
16 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
17 2MASS J03552337+1133437 BD* 03 55 23.3735910810 +11 33 43.797034332           L5gamma 142 0
18 HD 25175 * 04 00 36.8876419032 +17 17 47.972361768   6.352 6.305     A0V 57 0
19 HD 25258 * 04 00 38.9636941896 -04 05 49.618586328   10.60 10.36     A(pSrEu) 8 0
20 2MASS J04062677-3812102 BD* 04 06 26.77344 -38 12 10.2492           L2 12 0
21 NAME CAS-TAU ASS MGr 04 16 +27.6           ~ 86 1
22 NAME NGC 1566 Group GrG 04 20 00.6 -54 56 17           ~ 180 0
23 2MASSI J0421072-630602 BD* 04 21 07.18488 -63 06 02.2464           L5beta 23 0
24 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
25 2MASS J05012406-0010452 BD* 05 01 24.0852555792 -00 10 45.591750444           L4gamma 65 0
26 2MASSI J0518461-275645 BD* 05 18 46.1651510160 -27 56 45.713630832           L1.0V 39 0
27 V* AB Dor TT* 05 28 44.8712165880 -65 26 55.199147208 8.259 7.856 6.999 6.496 5.993 K0V 1080 0
28 * 32 Ori ** 05 30 47.05091 +05 56 53.2925 3.51 4.07 4.20 4.26 4.40 B5IV+B7V 205 0
29 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
30 2MASSI J0536199-192039 BD* 05 36 20.0168030088 -19 20 40.151155452           L2 26 0
31 NAME Columba Association As* 06 04 19.4 -22 20 40           ~ 337 0
32 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
33 2MASS J08350622+1953050 BD* 08 35 06.22944 +19 53 05.0532           L5 46 0
34 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
35 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
36 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
37 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
38 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
39 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
40 NAME eps Cha Association OpC 11 59 51 -78 12.4           ~ 188 0
41 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 376 0
42 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
43 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 467 1
44 NAME Cha II MoC 12 54 -77.2           ~ 361 0
45 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
46 2MASSW J1507476-162738 BD* 15 07 47.6758255542 -16 27 40.113982846     22.136 18.928 16.579 L5V 216 0
47 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
48 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 320 0
49 2MASS J15515237+0941148 BD* 15 51 52.37904 +09 41 14.8884           L4gamma 23 0
50 Lupus 3 SFR 16 09.6 -39 03           ~ 348 0
51 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
52 2MASS J16154255+4953211 BD* 16 15 42.55248 +49 53 21.1704           L4gamma 43 0
53 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
54 2MASSI J1726000+153819 BD* 17 26 00.07752 +15 38 19.0140           L2V 49 0
55 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 442 1
56 NAME * mu. Oph Group OpC 17 38 00 -08 06.7           ~ 19 0
57 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
58 NAME CrA Complex reg 19 15 00.0 -37 30 00           ~ 118 1
59 2MASS J19564700-7542270 BD* 19 56 47.00184 -75 42 27.0432           L2gamma 6 0
60 2MASS J21265040-8140293 BD* 21 26 50.3636724576 -81 40 29.223318396         18.38 L3gamma 22 0
61 2MASSW J2208136+292121 BD* 22 08 13.63056 +29 21 21.5352           L3gamma 62 0
62 2MASS J22134491-2136079 BD* 22 13 44.9168962584 -21 36 08.229763260           L0gamma 32 0
63 2MASS J22495345+0044046 BD* 22 49 53.45592 +00 44 04.6608           L3+L5 49 0
64 HD 218396c Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 312 1
65 HD 218396d Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 286 1
66 HD 218396b Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 323 1
67 2MASS J23225299-6151275 BD* 23 22 53.0081802408 -61 51 27.526074804           L2gamma 30 0
68 NAME Hyades Moving Group MGr ~ ~           ~ 300 0
69 NAME Carina-near Moving Group MGr ~ ~           ~ 118 0
70 NAME Carina Association As* ~ ~           ~ 188 1
71 NAME Argus Association As* ~ ~           ~ 266 0

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