2001ApJ...549L.233Z

Query : 2001ApJ...549L.233Z

2001ApJ...549L.233Z - Astrophys. J., 549, L233-L236 (2001/March-2)

The TW Hydrae association: discovery of T Tauri star members near HR 4796.

ZUCKERMAN B., WEBB R.A., SCHWARTZ M. and BECKLIN E.E.

Abstract (from CDS):

We have identified six T Tauri stars, at least three of which are double, that are members of the nearest region of recent star formation, the TW Hydrae association. The newly discovered systems are mostly located south and east of and farther from Earth than most previously known members; thus, the full extent of the association is not yet established. Including secondaries in multiple star systems, the association is now known to include more than 30 T Tauri stars and a brown dwarf. We compare the TW Hydrae association to four other young nearby associations.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Open Clusters and Associations: Individual: Name: TW Hydrae - Galaxy: Open Clusters and Associations: Individual: Name: Tucana - Galaxy: Open Clusters and Associations: Individual: Name: η Chamaeleontis - Galaxy: Open Clusters and Associations: Individual: Alphanumeric: MBM 12 - Galaxy: Open Clusters and Associations: Individual: Name: Horologium - Stars: Pre-Main-Sequence

Nomenclature: Table 1: TWA NNA (Nos 14, 15A-15B, 16-18, 19A-19B) added.

Simbad objects: 33

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Number of rows : 33
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 Horologium Association As* 02 10.0 -54 30           ~ 54 0
3 MBM 12 MoC 02 56 50 +19 32.0           ~ 230 1
4 NAME Horologium ClG ClG 03 35.0 -53 30           ~ 15 1
5 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
6 V* BX Ant TT* 10 18 28.6987521312 -31 50 02.830052544   13.39 11.454 11.382 9.325 M0Ve 130 0
7 V* CE Ant TT* 10 42 30.1018928760 -33 40 16.229805204   12.21 10.91   9.10 M2Ve 252 1
8 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
9 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
10 CD-29 8887 TT* 11 09 13.7928873024 -30 01 39.968872752   12.95 11.119 10.642 8.875 M2Ve 141 0
11 TWA 3B TT* 11 10 27.8406509184 -37 31 52.748684904   14.59 13.70   8.86 M4Ve 63 0
12 TWA 3 ** 11 10 27.894072 -37 31 51.96612   13.53 12.05 11.61 9.29 M4Ve+M4Ve 218 0
13 TWA 3A TT* 11 10 27.9121410480 -37 31 51.535547940   14.04 12.57   9.10 M4Ve 221 0
14 V* V1215 Cen TT* 11 13 26.2208680752 -45 23 42.720964188     12.478   10.483 K8IVe 89 0
15 V* V1217 Cen Or* 11 21 05.4814169256 -38 45 16.522915140   14.04 12.58 12.34 10.515 M1Ve 86 0
16 CD-34 7390A TT* 11 21 17.2193334624 -34 46 45.503251608   12.88 11.46 11.43 9.57 M1Ve 111 0
17 CD-34 7390 ** 11 21 17.24 -34 46 45.5     11.080   9.038 M1Ve+M1Ve 65 0
18 HD 98800 TT* 11 22 05.28975 -24 46 39.7571   10.20 9.28 9.26 7.386 K5V(e) 401 0
19 CD-33 7795 TT* 11 31 55.2608963280 -34 36 27.203892120   12.97 11.524 11.150 9.150 M2Ve 205 0
20 CD-26 8623B TT* 11 32 41.1733260768 -26 52 09.107765976   16.70 15.22 13.68 11.76 M5.5 84 0
21 CD-26 8623 TT* 11 32 41.2658824800 -26 51 55.961893800   13.69 12.23 11.14 9.637 M3Ve 118 0
22 TWA 19B Em* 11 47 20.5931919840 -49 53 04.336507860   13.82 12.30   10.21 K7e 30 0
23 HD 102458 Or* 11 47 24.5438206248 -49 53 03.018484572   9.70 9.07   8.40 G4V 102 0
24 CD-36 7429B TT* 11 48 23.7348035520 -37 28 48.520414812   15.43 14.00   11.45 M1V 93 0
25 CD-36 7429A TT* 11 48 24.2227406904 -37 28 49.114270524   12.54 11.17 10.92 9.552 K5V 145 0
26 CD-36 7429 ** 11 48 24.22320 -37 28 49.1537           ~ 98 0
27 V* V1250 Cen TT* 12 34 20.4720080040 -48 15 19.545583716   13.3 12.2   11.80 M3 44 0
28 V* V1251 Cen TT* 12 34 20.6481372456 -48 15 13.531352148   13.3 12.2   11.90 M3.5 50 0
29 TWA 16 ** 12 34 56.302608 -45 38 07.63332   14.05 12.58 12.21 10.310 M2.5 56 0
30 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
31 V* V1267 Cen TT* 13 20 45.3877266600 -46 11 37.711450572   14.0 12.7   10.78 K5IVe 49 0
32 V* V1268 Cen TT* 13 21 37.2192317688 -44 21 51.861714228     12.952   10.965 M0.5 45 0
33 HD 141569 Or* 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 578 0

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