2003AJ....126.2487B


Query : 2003AJ....126.2487B

2003AJ....126.2487B - Astron. J., 126, 2487-2494 (2003/November-0)

The 2MASS wide-field T dwarf search. II. Discovery of three T dwarfs in the southern hemisphere.

BURGASSER A.J., McELWAIN M.W. and KIRKPATRICK J.D.

Abstract (from CDS):

We present the discovery of three new southern hemisphere T dwarfs identified in the Two Micron All Sky Survey. These objects, 2MASS 0348-6022, 2MASS 0516-0445, and 2MASS 2228-4310, have classifications T7, T5.5, and T6.5, respectively. Using linear absolute magnitude/spectral type relations derived from T dwarfs with measured parallaxes, we estimate spectrophotometric distances for these discoveries; the closest, 2MASS 0348-6022, is likely within 10 pc of the Sun. Proper motions and estimated tangential velocities are consistent with membership in the Galactic disk population. We also list southern hemisphere T dwarf candidates that were either not found in subsequent near-infrared imaging observations and are most likely uncataloged minor planets, or have near-infrared spectra consistent with background stars.

Abstract Copyright:

Journal keyword(s): Infrared Radiation - Galaxy: Solar Neighborhood - stars: individual (2MASS J03480772-6022270) - stars: individual (2MASS J05160945-0445499) - stars: individual (2MASS J22282889-4310262) - Stars: Low-Mass, Brown Dwarfs

VizieR on-line data: <Available at CDS (J/AJ/126/2487): table1.dat table2.dat>

Simbad objects: 91

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Number of rows : 91
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 2MASS J00231718-3346366 BD? 00 23 17.1773361264 -33 46 36.628916916           ~ 1 0
2 V* AW Scl a2* 01 06 26.5793148072 -35 39 38.395271232 6.90 6.74 6.61 6.54 6.48 A1V 69 0
3 2MASS J01315876-1259435 * 01 31 58.77 -12 59 43.6           ~ 1 0
4 2MASS J01432550-1240101 * 01 43 25.50 -12 40 10.1           ~ 1 0
5 2MASS J01492365-1945149 * 01 49 23.65 -19 45 14.9           ~ 1 0
6 2MASS J02053685-0853442 LM* 02 05 36.8585817936 -08 53 44.196560232           M8V 4 0
7 2MASS J02100930+0908316 * 02 10 09.30 +09 08 31.6           ~ 1 0
8 HD 13936 * 02 15 28.3109874216 -09 27 59.497762932   6.537 6.549     A0V 57 0
9 2MASSI J0243137-245329 BD* 02 43 13.71792 -24 53 29.8356           T6.0 50 0
10 HD 17098 ** 02 43 20.23496 -40 31 40.4717   6.34 6.36     B9.5V 39 0
11 2MASS J02485356-4951573 BD? 02 48 53.5795804800 -49 51 57.359718396           ~ 1 0
12 2MASS J02512393-3842100 PM* 02 51 23.9404539480 -38 42 09.992696616           ~ 1 0
13 2MASS J02560785-4311108 BD? 02 56 07.8546839160 -43 11 10.804929936           ~ 1 0
14 HD 20293 * 03 15 00.2716225464 -26 06 01.650771864   6.280 6.240     A1V 41 0
15 2MASS J03164047-6202104 PM* 03 16 40.4652807960 -62 02 10.563063432           ~ 1 0
16 HD 22252 Pu* 03 30 51.7078870944 -66 29 22.962633936   5.746 5.800     B8IV 60 0
17 2MASS J03480772-6022270 BD* 03 48 07.72104 -60 22 27.0624           T7 32 0
18 HD 24863 V* 03 54 33.9608747352 -52 41 25.535512896   6.613 6.461     A4V 38 0
19 2MASS J03594765+1341458 * 03 59 47.65 +13 41 45.8           ~ 1 0
20 2MASS J04143647-6916594 BD? 04 14 36.4727231664 -69 16 59.629486224           ~ 1 0
21 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 165 0
22 HD 28763 * 04 31 25.8505846032 -13 38 39.202938816   6.321 6.250     A2/3V 49 0
23 HD 30321 PM* 04 46 24.1623639696 -02 57 16.300244664   6.361 6.316     A0/1V 43 0
24 HD 33948 * 05 13 33.2745822216 -08 08 51.953120520   6.243 6.372     B5III 30 0
25 2MASS J05160945-0445499 BD* 05 16 09.45840 -04 45 49.9392           T5.5 25 0
26 2MASS J05335973-0633098 LM* 05 33 59.7298725912 -06 33 09.855955260           MV 1 0
27 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2329 0
28 * 29 Dor Be* 05 36 54.9785586360 -66 33 37.027712484   6.221 6.274     A1IIIe 55 0
29 HD 37303 bC? 05 37 27.3575332104 -05 56 18.204499212 4.93 5.817 6.024     B2V(n) 124 0
30 2MASS J17065753-0428539 BD? 17 06 57.5348740632 -04 28 54.093972036           ~ 1 0
31 HD 159170 PM* 17 33 29.8450488456 -05 44 41.291576376   5.790 5.607     A5V 69 0
32 2MASS J18031154+1305281 BD? 18 03 11.5439277720 +13 05 28.119450912           ~ 1 0
33 HD 171975 * 18 37 12.6184382664 +11 25 17.425550028 6.320 6.540 6.560     B9V 39 0
34 HD 169904 * 18 42 14.4201465768 -81 48 29.206415628   6.154 6.262     B8V 28 0
35 HD 176425 * 19 02 08.5209987912 -41 54 37.826010432   6.199 6.209     A0V 33 0
36 2MASS J19084533-3352087 * 19 08 45.34 -33 52 08.8           ~ 1 0
37 2MASS J19092267-8234478 PM* 19 09 22.6322301120 -82 34 47.880994620           ~ 2 0
38 2MASS J19183027-3427382 * 19 18 30.27 -34 27 38.2           ~ 1 0
39 2MASS J19215777-6303224 PM* 19 21 57.7720301232 -63 03 22.221857052           ~ 2 0
40 2MASS J19263511-3435565 * 19 26 35.12 -34 35 56.6           ~ 1 0
41 2MASS J19300878-4435012 BD? 19 30 08.7807257112 -44 35 01.274014608           ~ 1 0
42 UCAC4 108-121636 PM* 19 32 22.8298005600 -68 35 59.223978564           ~ 1 0
43 2MASS J19325619-4851162 PM* 19 32 56.2045652544 -48 51 16.058389176           ~ 1 0
44 2MASS J19355972-2923351 * 19 35 59.73 -29 23 35.2           ~ 1 0
45 2MASS J19383909-2735379 PM* 19 38 39.0875816616 -27 35 38.098523616           ~ 1 0
46 2MASS J19394892-5531025 PM* 19 39 48.9311319216 -55 31 02.483086044           ~ 1 0
47 HD 184586 PM* 19 39 52.1819287368 -66 41 07.823523588   6.398 6.370     A1V 24 0
48 2MASS J19465571-3644491 BD? 19 46 55.71024 -36 44 49.1928           ~ 1 0
49 HD 186837 * 19 50 21.7568928744 -61 03 40.025569176   6.063 6.206     B5V 49 0
50 2MASS J19530053-3512193 * 19 53 00.54 -35 12 19.3           ~ 1 0
51 HD 189399 * 20 00 37.3938167328 -22 50 11.657165388   9.85 9.68     A0V 4 0
52 HD 189388 * 20 01 26.7787241904 -40 48 51.603904080   6.412 6.306     A2/3V 32 0
53 2MASS J20014023-4111011 BD? 20 01 40.2415166952 -41 11 01.156791048           ~ 1 0
54 EGGR 498 WD* 20 05 34.8732768746 -10 56 54.432926709   17.91 16.89 16.4   DA10 53 0
55 2MASS J20153100-2958197 * 20 15 31.00 -29 58 19.8           ~ 1 0
56 2MASS J20180855-3250195 * 20 18 08.56 -32 50 19.6           ~ 1 0
57 2MASS J20203953-3414209 * 20 20 39.53 -34 14 21.0           ~ 1 0
58 2MASS J20352362-3858012 * 20 35 23.62 -38 58 01.2           ~ 1 0
59 2MASS J20364476+0335475 PM* 20 36 44.7678620112 +03 35 47.537770416           ~ 1 0
60 2MASS J20425201-7924433 PM* 20 42 52.0461260472 -79 24 43.331445000           ~ 2 0
61 2MASS J20464656-2831162 * 20 46 46.57 -28 31 16.2           ~ 1 0
62 HD 198070 * 20 47 47.8787268456 +03 18 23.279796036 6.29 6.38 6.40     B9V 46 0
63 2MASS J20493283-4532443 * 20 49 32.83 -45 32 44.3           ~ 1 0
64 2MASS J20495554-3525083 * 20 49 55.54 -35 25 08.3           ~ 1 0
65 2MASS J20514464-3123264 * 20 51 44.65 -31 23 26.4           ~ 1 0
66 2MASS J20572107-3304186 * 20 57 21.08 -33 04 18.7           ~ 1 0
67 2MASS J20592033+1752232 BD? 20 59 20.3339315280 +17 52 23.308621140           ~ 1 0
68 2MASS J21035085-2237412 * 21 03 50.86 -22 37 41.3           ~ 1 0
69 2MASS J21050753-3122506 * 21 05 07.54 -31 22 50.7           ~ 1 0
70 2MASS J21054515-3542535 * 21 05 45.15 -35 42 53.5           ~ 1 0
71 2MASS J21090201-3725168 * 21 09 02.01 -37 25 16.9           ~ 1 0
72 2MASS J21113838-4133320 * 21 11 38.38 -41 33 32.1           ~ 1 0
73 * 15 Aqr * 21 18 11.0726992680 -04 31 10.127623692   5.679 5.812     B7III 53 0
74 2MASS J21183794-2813093 * 21 18 37.94 -28 13 09.3           ~ 1 0
75 2MASS J21264358-0926573 BD? 21 26 43.5951412080 -09 26 57.325068924           ~ 1 0
76 2MASS J21285884-4249292 * 21 28 58.85 -42 49 29.2           ~ 1 0
77 2MASS J21301473-0720578 PM* 21 30 14.7357957744 -07 20 57.961479660           ~ 2 0
78 HD 203955 * 21 33 21.1463832624 -80 02 21.694850808   6.504 6.466     A0V 15 0
79 2MASS J21393009-0928268 BD? 21 39 30.1061667096 -09 28 27.041292948           ~ 1 0
80 2MASS J21413332-2453233 * 21 41 33.33 -24 53 23.4           ~ 1 0
81 2MASS J21443131+0327100 BD? 21 44 31.3146830256 +03 27 10.038741048           ~ 1 0
82 HD 207563 * 21 49 26.8665291504 +20 27 44.800800696 5.55 6.162 6.267     B2V 70 0
83 2MASS J22050171-2658019 * 22 05 01.72 -26 58 01.9           ~ 1 0
84 2MASS J22154587-2605584 * 22 15 45.87 -26 05 58.4           ~ 1 0
85 2MASS J22165310-2656329 * 22 16 53.10 -26 56 33.0           ~ 2 0
86 2MASS J22282889-4310262 BD* 22 28 28.89432 -43 10 26.2740           T6.5 66 0
87 2MASS J22311396-3417156 * 22 31 13.96 -34 17 15.7           ~ 1 0
88 2MASS J22385056-5456370 * 22 38 50.57 -54 56 37.1           ~ 1 0
89 * 67 Aqr * 22 43 14.2632529104 -06 57 46.574389404   6.368 6.405     B7.5V 51 0
90 2MASS J22541137-4826135 * 22 54 11.38 -48 26 13.6           ~ 1 0
91 HD 220802 * 23 27 09.1090945128 -50 09 26.078801220   6.125 6.199     B9V 41 0

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