2000ApJ...535..959Z

Query : 2000ApJ...535..959Z

2000ApJ...535..959Z - Astrophys. J., 535, 959-964 (2000/June-1)

Identification of a nearby stellar association in the Hipparcos catalog: implications for recent, local star formation.

ZUCKERMAN B. and WEBB R.A.

Abstract (from CDS):

The TW Hydrae Association (∼55 pc from Earth) is the nearest known region of recent star formation. Based primarily on the Hipparcos catalog, we have identified a group of nine or 10 comoving star systems at a common distance (∼45 pc) from Earth that appear to comprise another, somewhat older association (``the Tucanae Association''). Together with ages and motions recently determined for some nearby field stars, the existence of the Tucanae and TW Hydrae Associations suggests that the Sun is now close to a region that was the site of substantial star formation only 10-50 Myr ago. The TW Hydrae Association represents a final chapter in the local star formation history.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Open Clusters and Associations: General - open clusters and associations: individual (TW Hydrae) - Stars: Formation - Stars: Pre-Main-Sequence

Simbad objects: 55

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Number of rows : 55
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 HD 67 PM* 00 05 28.4520372600 -61 13 33.074149188   9.47 8.80     G5V 58 1
3 CD-60 31 PM* 00 17 30.5008123584 -59 57 04.563939636   12.90 11.26     M1V 25 0
4 HD 1466 PM* 00 18 26.1235857360 -63 28 38.980983432   8.00 7.46     F8V 138 0
5 Smethells 165 ** 00 24 08.9692009536 -62 11 04.331547384   12.71 11.335 11.076 9.49 M0Ve 76 0
6 V* CT Tuc PM* 00 25 14.6618673216 -61 30 48.252745152   13.11 11.34   9.66 M0Ve 79 0
7 * bet01 Tuc ** 00 31 32.6680562275 -62 57 29.582843542   4.249 4.289     B9.5Va 125 0
8 * bet02 Tuc ** 00 31 33.4223046159 -62 57 56.133914894   4.649 4.514     A3IV 108 0
9 * bet03 Tuc ** 00 32 43.9053745704 -63 01 53.402028960 5.15 5.13 5.09     A0V 139 0
10 HD 3221 SB* 00 34 51.2017857192 -61 54 58.128126444   10.83 9.604   8.238 K4Ve 99 0
11 * q01 Eri PM* 01 42 29.3145176952 -53 44 26.991453264   6.05 5.52     F9V 368 1
12 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
13 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
14 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 2087 1
15 NAME Car Arm PoG 10 00 -60.0           ~ 471 1
16 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
17 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
18 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 467 1
19 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
20 HD 135344B Or* 15 15 48.4460065200 -37 09 16.024369824   9.21 8.708     F8V 548 0
21 HD 135344 Or* 15 15 48.9462675744 -37 08 55.731368400   7.84 7.76     A0V 155 1
22 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
23 NAME Scorpius Cloud MoC 16 29 00 -19 00.0           ~ 37 0
24 HD 172555 PM* 18 45 26.9009806435 -64 52 16.534807985   4.967 4.767     A7V 321 0
25 V* PZ Tel BY* 18 53 05.8735056984 -50 10 49.897437168   9.22 8.342   7.464 G9IV 364 0
26 HD 175531 ** 18 57 56.67180 -44 58 06.7537       9.839   G8/K0(V) 16 0
27 * rho Tel SB* 19 06 19.9561471392 -52 20 27.280858848   5.700 5.174     F6V 85 0
28 HD 177720 PM* 19 08 51.1245926832 -54 02 17.490429420   9.29 8.75     G0V 20 0
29 HD 180134 PM* 19 18 09.7813021536 -53 23 13.511922864   6.844 6.362     F7V 68 0
30 Smethells 36 PM* 19 19 49.6759769208 -53 43 13.750755672   13.35 12.07 9.8 8.58 M2V 27 0
31 * eta Tel PM* 19 22 51.2060774616 -54 25 26.145617376   5.035 5.020   4.99 A0V 228 0
32 HD 181327 PM* 19 22 58.9437222504 -54 32 16.975668624   7.50 7.04   6.49 F6V 331 0
33 HD 181516 PM* 19 23 20.5674138504 -50 41 20.373937800   9.80 9.01     G6IV 18 0
34 HD 187101 PM* 19 51 23.6561676120 -58 30 35.538347736   8.59 8.02     F8/G0V 43 0
35 HD 191869A PM* 20 14 56.1701529120 -56 58 35.305868928   8.39 7.92 8.68   F6/8 39 0
36 * alf Pav SB* 20 25 38.85705 -56 44 06.3230 1.03 1.791 1.918     B2IV 285 1
37 * phi01 Pav PM* 20 35 34.8500676912 -60 34 54.296843484   5.036 4.745     F0V 86 0
38 HD 195818 PM* 20 36 02.3604067248 -54 56 28.996870452   9.15 8.60     G0V 34 0
39 Smethells 59 PM* 20 38 19.4348215512 -55 36 19.736178228 14.1 12.78 13.325 10.969 9.601 M0V 30 0
40 V* AT Mic Er* 20 41 51.15925 -32 26 06.8283 12.753 11.909 10.343 9.098 7.383 M4.5Ve+M4.5Ve 371 0
41 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1344 0
42 HD 199065 ** 20 57 22.4358526 -59 04 33.474323           G2/5V+G: 38 0
43 HD 200676 ** 21 07 17.5009661040 -57 01 56.195370552   9.68 8.84     K1V 37 0
44 HD 200798 PM* 21 07 51.2212151520 -54 12 59.458400748   6.93 6.70     A5/6IV/V 41 0
45 HD 202917 PM* 21 20 49.9576157736 -53 02 03.155667216   9.32 8.67   7.882 G7V 191 0
46 V* BS Ind SB* 21 20 59.8038697752 -52 28 40.207860948   10.70 8.900   7.893 G9V 81 0
47 Smethells 86 PM* 21 44 30.1227174024 -60 58 38.894635668 14.163 13.00 11.628 10.715 9.815 M0Ve 86 0
48 HD 207129 PM* 21 48 15.7511634187 -47 18 13.017893348   6.18 5.58     G2V 357 0
49 HD 207377 ** 21 50 23.7914618352 -58 18 18.188935272   8.62 7.89     G6V 41 0
50 HD 207964 ** 21 55 11.39417 -61 53 11.7947   6.37 5.96     F0(V)+F5(V) 95 1
51 HD 210507 PM* 22 12 16.9427847888 -54 58 40.689226812   10.62 9.62     K3V 41 0
52 HD 218340 PM* 23 08 12.3705531504 -63 37 41.372351436   9.07 8.44     G3V 57 0
53 CD-64 1417 EB* 23 15 01.1351329920 -63 34 24.568757652   10.73 9.633   8.669 K0IV 21 0
54 HD 222259A RS* 23 39 39.4808078664 -69 11 44.707735104   9.161 8.226 9.28 7.352 G6V 190 0
55 * eta Tuc ** 23 57 35.0786487048 -64 17 53.627347464   5.046 4.989     A1V 94 0

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