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 (2000)
RA 		ICRS (2000)
DEC 		Proper motions Parallaxes Redshift Rad. vel. cz Mag U Mag B Mag V Mag R Mag I Sp type Morph. type Angular size #ref
1983 - 2024
1 2MASS J00231718-3346366 BrownD*_Candidate 00 23 17.1773361264 -33 46 36.628916916 31.315 6.734 5.6183 ~ ~ ~           ~ ~ ~ ~ ~ 1
2 V* AW Scl alf2CVnV* 01 06 26.5793148072 -35 39 38.395271232 68.868 -17.640 5.7356 0.000060 17.9 17.90 6.90 6.74 6.61 6.54 6.48 A1V ~ ~ ~ ~ 43
3 2MASS J01315876-1259435 Star 01 31 58.77 -12 59 43.6 ~ ~ ~           ~ ~ ~ ~ ~ 1
4 2MASS J01432550-1240101 Star 01 43 25.50 -12 40 10.1 ~ ~ ~           ~ ~ ~ ~ ~ 1
5 2MASS J01492365-1945149 Star 01 49 23.65 -19 45 14.9 ~ ~ ~           ~ ~ ~ ~ ~ 1
6 2MASS J02053685-0853442 Low-Mass* 02 05 36.8585817936 -08 53 44.196560232 -6.260 -17.855 4.3662 0.000013 4 4.00           M8V ~ ~ ~ ~ 4
7 2MASS J02100930+0908316 Star 02 10 09.30 +09 08 31.6 ~ ~ ~           ~ ~ ~ ~ ~ 1
8 HD 13936 Star 02 15 28.3109874216 -09 27 59.497762932 -7.597 -5.180 5.0415 -0.000004 -1.10 -1.10   6.537 6.549     A0V ~ ~ ~ ~ 52
9 2MASSI J0243137-245329 BrownD* 02 43 13.71792 -24 53 29.8356 -288 -208 93.62 ~ ~ ~           T6.0 ~ ~ ~ ~ 50
10 HD 17098 ** 02 43 20.23496 -40 31 40.4717 14.07 12.69 5.48 0.000051 15.30 15.30   6.34 6.36     B9.5V ~ ~ ~ ~ 31
11 2MASS J02485356-4951573 BrownD*_Candidate 02 48 53.5795804800 -49 51 57.359718396 2.205 16.108 7.7412 ~ ~ ~           ~ ~ ~ ~ ~ 1
12 2MASS J02512393-3842100 HighPM* 02 51 23.9404539480 -38 42 09.992696616 92.621 22.460 6.0543 ~ ~ ~           ~ ~ ~ ~ ~ 1
13 2MASS J02560785-4311108 BrownD*_Candidate 02 56 07.8546839160 -43 11 10.804929936 33.780 21.274 8.7418 ~ ~ ~           ~ ~ ~ ~ ~ 1
14 HD 20293 Star 03 15 00.2716225464 -26 06 01.650771864 -8.952 -21.837 6.3843 -0.000019 -5.79 -5.79   6.280 6.240     A1V ~ ~ ~ ~ 34
15 2MASS J03164047-6202104 HighPM* 03 16 40.4652807960 -62 02 10.563063432 296.760 -5.686 8.8722 ~ ~ ~           ~ ~ ~ ~ ~ 1
16 HD 22252 PulsV* 03 30 51.7078870944 -66 29 22.962633936 17.374 2.056 4.1151 0.000097 29.14 29.14   5.746 5.800     B8IV ~ ~ ~ ~ 52
17 2MASS J03480772-6022270 BrownD* 03 48 07.72104 -60 22 27.0624 -279.7 -768.5 120.1 -0.000047 -14.1 -14.10           T7 ~ ~ ~ ~ 32
18 HD 24863 Variable* 03 54 33.9608747352 -52 41 25.535512896 26.471 -39.438 8.5688 0.000068 20.31 20.31   6.613 6.461     A4V ~ ~ ~ ~ 34
19 2MASS J03594765+1341458 Star 03 59 47.65 +13 41 45.8 ~ ~ ~           ~ ~ ~ ~ ~ 1
20 2MASS J04143647-6916594 BrownD*_Candidate 04 14 36.4727231664 -69 16 59.629486224 14.011 48.588 8.0233 ~ ~ ~           ~ ~ ~ ~ ~ 1
21 2MASSI J0415195-093506 BrownD* 04 15 19.54368 -09 35 06.6732 2193 527 174.34 0.000165 49.6 49.60           T8.0 ~ ~ ~ ~ 165
22 HD 28763 Star 04 31 25.8505846032 -13 38 39.202938816 -18.131 -42.378 10.1892 -0.000022 -6.48 -6.48   6.321 6.250     A2/3V ~ ~ ~ ~ 43
23 HD 30321 HighPM* 04 46 24.1623639696 -02 57 16.300244664 18.729 -53.452 10.9229 0.000061 18.21 18.21   6.361 6.316     A0/1V ~ ~ ~ ~ 42
24 HD 33948 Star 05 13 33.2745822216 -08 08 51.953120520 2.236 -2.707 3.6956 ~ ~ ~   6.243 6.372     B5III ~ ~ ~ ~ 21
25 2MASS J05160945-0445499 BrownD* 05 16 09.45840 -04 45 49.9392 -222.1 -202.6 54.2 ~ ~ ~           T5.5 ~ ~ ~ ~ 26
26 2MASS J05335973-0633098 Low-Mass* 05 33 59.7298725912 -06 33 09.855955260 0.574 0.130 2.7979 ~ ~ ~           MV ~ ~ ~ ~ 1
27 NAME Orion Nebula Cluster OpenCluster 05 35.0 -05 29 1.51 0.50 2.48 0.000073 21.80 21.80           ~ ~ ~ ~ ~ 2323
28 * 29 Dor Be* 05 36 54.9785586360 -66 33 37.027712484 -5.912 11.403 4.6624 0.000048 14.50 14.50   6.221 6.274     A1IIIe ~ ~ ~ ~ 50
29 HD 37303 bCepV*_Candidate 05 37 27.3575332104 -05 56 18.204499212 2.263 -1.804 2.7353 0.000118 35.299702 35.30 4.93 5.817 6.024     B2V(n) ~ ~ ~ ~ 84
30 2MASS J17065753-0428539 BrownD*_Candidate 17 06 57.5348740632 -04 28 54.093972036 -13.064 -1.368 2.9139 ~ ~ ~           ~ ~ ~ ~ ~ 1
31 HD 159170 HighPM* 17 33 29.8450488456 -05 44 41.291576376 -41.683 -95.508 21.3634 -0.000081 -24.24 -24.24   5.790 5.607     A5V ~ ~ ~ ~ 63
32 2MASS J18031154+1305281 BrownD*_Candidate 18 03 11.5439277720 +13 05 28.119450912 27.292 -13.641 4.2003 ~ ~ ~           ~ ~ ~ ~ ~ 1
33 HD 171975 Star 18 37 12.6184382664 +11 25 17.425550028 -14.321 -8.894 4.0793 -0.000088 -26.30 -26.30 6.320 6.540 6.560     B9V ~ ~ ~ ~ 33
34 HD 169904 Star 18 42 14.4201465768 -81 48 29.206415628 13.838 -16.605 6.7598 -0.000020 -6.00 -6.00   6.154 6.262     B8V ~ ~ ~ ~ 21
35 HD 176425 Star 19 02 08.5209987912 -41 54 37.826010432 30.557 -11.271 9.1110 -0.000026 -7.92 -7.92   6.199 6.209     A0V ~ ~ ~ ~ 30
36 2MASS J19084533-3352087 Star 19 08 45.34 -33 52 08.8 ~ ~ ~           ~ ~ ~ ~ ~ 1
37 2MASS J19092267-8234478 HighPM* 19 09 22.6322301120 -82 34 47.880994620 -92.075 -186.179 10.4518 ~ ~ ~           ~ ~ ~ ~ ~ 2
38 2MASS J19183027-3427382 Star 19 18 30.27 -34 27 38.2 ~ ~ ~           ~ ~ ~ ~ ~ 1
39 2MASS J19215777-6303224 HighPM* 19 21 57.7720301232 -63 03 22.221857052 66.226 -143.625 9.2069 ~ ~ ~           ~ ~ ~ ~ ~ 2
40 2MASS J19263511-3435565 Star 19 26 35.12 -34 35 56.6 ~ ~ ~           ~ ~ ~ ~ ~ 1
41 2MASS J19300878-4435012 BrownD*_Candidate 19 30 08.7807257112 -44 35 01.274014608 4.484 -42.347 4.3025 ~ ~ ~           ~ ~ ~ ~ ~ 1
42 UCAC4 108-121636 HighPM* 19 32 22.8298005600 -68 35 59.223978564 51.568 -56.815 5.3547 ~ ~ ~           ~ ~ ~ ~ ~ 1
43 2MASS J19325619-4851162 HighPM* 19 32 56.2045652544 -48 51 16.058389176 30.115 -73.489 5.0035 ~ ~ ~           ~ ~ ~ ~ ~ 1
44 2MASS J19355972-2923351 Star 19 35 59.73 -29 23 35.2 ~ ~ ~           ~ ~ ~ ~ ~ 1
45 2MASS J19383909-2735379 HighPM* 19 38 39.0875816616 -27 35 38.098523616 -34.886 -70.554 7.0502 ~ ~ ~           ~ ~ ~ ~ ~ 1
46 2MASS J19394892-5531025 HighPM* 19 39 48.9311319216 -55 31 02.483086044 7.159 -71.824 7.464 ~ ~ ~           ~ ~ ~ ~ ~ 1
47 HD 184586 HighPM* 19 39 52.1819287368 -66 41 07.823523588 34.713 -40.544 10.5611 -0.000055 -16.58 -16.58   6.398 6.370     A1V ~ ~ ~ ~ 18
48 2MASS J19465571-3644491 BrownD*_Candidate 19 46 55.71024 -36 44 49.1928 ~ ~ ~           ~ ~ ~ ~ ~ 1
49 HD 186837 Star 19 50 21.7568928744 -61 03 40.025569176 3.254 5.583 3.8093 -0.000051 -15.4 -15.40   6.063 6.206     B5V ~ ~ ~ ~ 31
50 2MASS J19530053-3512193 Star 19 53 00.54 -35 12 19.3 ~ ~ ~           ~ ~ ~ ~ ~ 1
51 HD 189399 Star 20 00 37.3938167328 -22 50 11.657165388 1.496 0.124 2.2407 ~ ~ ~   9.85 9.68     A0V ~ ~ ~ ~ 4
52 HD 189388 Star 20 01 26.7787241904 -40 48 51.603904080 25.872 -39.047 11.2432 -0.000125 -37.62 -37.62   6.412 6.306     A2/3V ~ ~ ~ ~ 27
53 2MASS J20014023-4111011 BrownD*_Candidate 20 01 40.2415166952 -41 11 01.156791048 21.706 11.625 7.0814 ~ ~ ~           ~ ~ ~ ~ ~ 1
54 EGGR 498 WhiteDwarf 20 05 34.8732768746 -10 56 54.432926709 1063.416 -81.593 57.8150 ~ ~ ~   17.91 16.89 16.4   DA10 ~ ~ ~ ~ 51
55 2MASS J20153100-2958197 Star 20 15 31.00 -29 58 19.8 ~ ~ ~           ~ ~ ~ ~ ~ 1
56 2MASS J20180855-3250195 Star 20 18 08.56 -32 50 19.6 ~ ~ ~           ~ ~ ~ ~ ~ 1
57 2MASS J20203953-3414209 Star 20 20 39.53 -34 14 21.0 ~ ~ ~           ~ ~ ~ ~ ~ 1
58 2MASS J20352362-3858012 Star 20 35 23.62 -38 58 01.2 ~ ~ ~           ~ ~ ~ ~ ~ 1
59 2MASS J20364476+0335475 HighPM* 20 36 44.7678620112 +03 35 47.537770416 -66.571 -115.588 7.7674 ~ ~ ~           ~ ~ ~ ~ ~ 1
60 2MASS J20425201-7924433 HighPM* 20 42 52.0461260472 -79 24 43.331445000 -61.325 127.171 9.9854 ~ ~ ~           ~ ~ ~ ~ ~ 2
61 2MASS J20464656-2831162 Star 20 46 46.57 -28 31 16.2 ~ ~ ~           ~ ~ ~ ~ ~ 1
62 HD 198070 Star 20 47 47.8787268456 +03 18 23.279796036 38.664 9.473 8.3958 -0.000070 -21.00 -21.00 6.29 6.38 6.40     B9V ~ ~ ~ ~ 41
63 2MASS J20493283-4532443 Star 20 49 32.83 -45 32 44.3 ~ ~ ~           ~ ~ ~ ~ ~ 1
64 2MASS J20495554-3525083 Star 20 49 55.54 -35 25 08.3 ~ ~ ~           ~ ~ ~ ~ ~ 1
65 2MASS J20514464-3123264 Star 20 51 44.65 -31 23 26.4 ~ ~ ~           ~ ~ ~ ~ ~ 1
66 2MASS J20572107-3304186 Star 20 57 21.08 -33 04 18.7 ~ ~ ~           ~ ~ ~ ~ ~ 1
67 2MASS J20592033+1752232 BrownD*_Candidate 20 59 20.3339315280 +17 52 23.308621140 17.210 3.105 5.8547 ~ ~ ~           ~ ~ ~ ~ ~ 1
68 2MASS J21035085-2237412 Star 21 03 50.86 -22 37 41.3 ~ ~ ~           ~ ~ ~ ~ ~ 1
69 2MASS J21050753-3122506 Star 21 05 07.54 -31 22 50.7 ~ ~ ~           ~ ~ ~ ~ ~ 1
70 2MASS J21054515-3542535 Star 21 05 45.15 -35 42 53.5 ~ ~ ~           ~ ~ ~ ~ ~ 1
71 2MASS J21090201-3725168 Star 21 09 02.01 -37 25 16.9 ~ ~ ~           ~ ~ ~ ~ ~ 1
72 2MASS J21113838-4133320 Star 21 11 38.38 -41 33 32.1 ~ ~ ~           ~ ~ ~ ~ ~ 1
73 * 15 Aqr Star 21 18 11.0726992680 -04 31 10.127623692 12.314 12.776 4.5080 -0.000030 -9.00 -9.00   5.679 5.812     B7III ~ ~ ~ ~ 42
74 2MASS J21183794-2813093 Star 21 18 37.94 -28 13 09.3 ~ ~ ~           ~ ~ ~ ~ ~ 1
75 2MASS J21264358-0926573 BrownD*_Candidate 21 26 43.5951412080 -09 26 57.325068924 46.676 -1.027 7.6962 ~ ~ ~           ~ ~ ~ ~ ~ 1
76 2MASS J21285884-4249292 Star 21 28 58.85 -42 49 29.2 ~ ~ ~           ~ ~ ~ ~ ~ 1
77 2MASS J21301473-0720578 HighPM* 21 30 14.7357957744 -07 20 57.961479660 168.413 -81.317 10.6756 ~ ~ ~           ~ ~ ~ ~ ~ 2
78 HD 203955 Star 21 33 21.1463832624 -80 02 21.694850808 22.969 -21.451 8.1423 0.000072 21.55 21.55   6.504 6.466     A0V ~ ~ ~ ~ 12
79 2MASS J21393009-0928268 BrownD*_Candidate 21 39 30.1061667096 -09 28 27.041292948 -11.797 -19.382 4.8811 ~ ~ ~           ~ ~ ~ ~ ~ 1
80 2MASS J21413332-2453233 Star 21 41 33.33 -24 53 23.4 ~ ~ ~           ~ ~ ~ ~ ~ 1
81 2MASS J21443131+0327100 BrownD*_Candidate 21 44 31.3146830256 +03 27 10.038741048 16.407 -9.805 9.3605 ~ ~ ~           ~ ~ ~ ~ ~ 1
82 HD 207563 Star 21 49 26.8665291504 +20 27 44.800800696 1.286 0.134 2.5551 -0.000054 -16.30 -16.30 5.55 6.162 6.267     B2V ~ ~ ~ ~ 44
83 2MASS J22050171-2658019 Star 22 05 01.72 -26 58 01.9 ~ ~ ~           ~ ~ ~ ~ ~ 1
84 2MASS J22154587-2605584 Star 22 15 45.87 -26 05 58.4 ~ ~ ~           ~ ~ ~ ~ ~ 1
85 2MASS J22165310-2656329 Star 22 16 53.10 -26 56 33.0 ~ ~ ~           ~ ~ ~ ~ ~ 2
86 2MASS J22282889-4310262 BrownD* 22 28 28.89432 -43 10 26.2740 51.7 -301.3 92.1 ~ ~ ~           T6.5 ~ ~ ~ ~ 68
87 2MASS J22311396-3417156 Star 22 31 13.96 -34 17 15.7 ~ ~ ~           ~ ~ ~ ~ ~ 1
88 2MASS J22385056-5456370 Star 22 38 50.57 -54 56 37.1 ~ ~ ~           ~ ~ ~ ~ ~ 1
89 * 67 Aqr Star 22 43 14.2632529104 -06 57 46.574389404 25.615 -10.257 7.8602 0.000050 15.04 15.04   6.368 6.405     B7.5V ~ ~ ~ ~ 41
90 2MASS J22541137-4826135 Star 22 54 11.38 -48 26 13.6 ~ ~ ~           ~ ~ ~ ~ ~ 1
91 HD 220802 Star 23 27 09.1090945128 -50 09 26.078801220 30.313 8.437 6.8237 -0.000003 -0.8 -0.80   6.125 6.199     B9V ~ ~ ~ ~ 32

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