2003MNRAS.342..837R

Query : 2003MNRAS.342..837R

2003MNRAS.342..837R - Mon. Not. R. Astron. Soc., 342, 837-850 (2003/July-1)

Activity and kinematics of members of the TW Hydrae association.

REID N.

Abstract (from CDS):

We present high-resolution echelle spectroscopy of 20 stars in 16 systems catalogued as members of the TW Hydrae association, and 16 stars identified as possible new members. We have calibrated the range of coronal and chromospheric activity expected for such young stars as a function of spectral type by combining our observations with literature data for field and open cluster stars. We also compute space motions for TWA members and candidate members with proper motion measurements, using two techniques to estimate distances to stars lacking direct trigonometric parallax measurements. The mean space motion of the four TWA members with known parallaxes is (U, V, W : -10.0, -17.8, -4.6) km/s. 14 of the candidates have properties inconsistent with cluster membership; the remaining two are potential new members, although further observations are required to confirm this possibility.

Abstract Copyright: 2003 RAS

Journal keyword(s): stars: activity - open clusters and associations: individual: TW Hydrae - solar neighbourhood

Nomenclature: Table 1: TWA NN (No. 20) added.

CDS comments: Table 1: XACT NNN = TYC FFFF NNNNN N in SIMBAD, R 4-42AB not identified

Simbad objects: 54

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Number of rows : 54
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 CD-39 5833 * 09 47 19.8552144552 -40 03 09.845765064   11.57 10.89     K0V 36 0
2 V* BX Ant TT* 10 18 28.6987521312 -31 50 02.830052544   13.39 11.454 11.382 9.325 M0Ve 130 0
3 TYC 5497-897-1 * 10 31 23.8100924496 -14 33 48.939898932   11.46 10.75     ~ 4 0
4 HD 296790 PM* 10 32 43.9096237032 -44 40 55.669553976   10.50 9.649   8.747 K0V 20 0
5 V* CE Ant TT* 10 42 30.1018928760 -33 40 16.229805204   12.21 10.91   9.10 M2Ve 252 1
6 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
7 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
8 CD-29 8887 TT* 11 09 13.7928873024 -30 01 39.968872752   12.95 11.119 10.642 8.875 M2Ve 141 0
9 TWA 3B TT* 11 10 27.8406509184 -37 31 52.748684904   14.59 13.70   8.86 M4Ve 63 0
10 TWA 3 ** 11 10 27.894072 -37 31 51.96612   13.53 12.05 11.61 9.29 M4Ve+M4Ve 218 0
11 TWA 3A TT* 11 10 27.9121410480 -37 31 51.535547940   14.04 12.57   9.10 M4Ve 221 0
12 V* V1215 Cen TT* 11 13 26.2208680752 -45 23 42.720964188     12.478   10.483 K8IVe 89 0
13 V* V1217 Cen Or* 11 21 05.4814169256 -38 45 16.522915140   14.04 12.58 12.34 10.515 M1Ve 86 0
14 CD-34 7390A TT* 11 21 17.2193334624 -34 46 45.503251608   12.88 11.46 11.43 9.57 M1Ve 111 0
15 CD-34 7390 ** 11 21 17.24 -34 46 45.5     11.080   9.038 M1Ve+M1Ve 65 0
16 CD-34 7390B TT* 11 21 17.4430606440 -34 46 49.775810700   13.43 11.96 11.31 9.88 M1Ve 84 0
17 HD 98800B SB* 11 22 05.2890267409 -24 46 38.767455498   11.18 9.92     ~ 144 1
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-39 7118B Y*O 11 27 28.8046781424 -39 52 57.425386944   11.2 10.6     K3IV(e) 5 0
20 CD-33 7795B LM* 11 31 55.2565351569 -34 36 25.242585993     20.40   15.8 M8.5/9e 131 0
21 CD-33 7795 TT* 11 31 55.2608963280 -34 36 27.203892120   12.97 11.524 11.150 9.150 M2Ve 205 0
22 CD-26 8623B TT* 11 32 41.1733260768 -26 52 09.107765976   16.70 15.22 13.68 11.76 M5.5 84 0
23 CD-26 8623 TT* 11 32 41.2658824800 -26 51 55.961893800   13.69 12.23 11.14 9.637 M3Ve 118 0
24 CD-48 6632 * 11 35 03.7637834856 -48 50 21.973735500   10.95 10.27     G7V 15 0
25 TWA 26 LM* 11 39 51.1378374696 -31 59 21.443660124         15.83 M8e 125 0
26 TWA 19B Em* 11 47 20.5931919840 -49 53 04.336507860   13.82 12.30   10.21 K7e 30 0
27 HD 102458 Or* 11 47 24.5438206248 -49 53 03.018484572   9.70 9.07   8.40 G4V 102 0
28 Ross 128 PM* 11 47 44.3972681420 +00 48 16.400337591 14.223 12.905 11.153 9.859 8.184 dM4 484 0
29 CD-36 7429B TT* 11 48 23.7348035520 -37 28 48.520414812   15.43 14.00   11.45 M1V 93 0
30 CD-36 7429A TT* 11 48 24.2227406904 -37 28 49.114270524   12.54 11.17 10.92 9.552 K5V 145 0
31 CD-36 7429 ** 11 48 24.22320 -37 28 49.1537           ~ 98 0
32 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 376 0
33 CD-48 7200 * 12 10 12.8825747280 -48 55 26.507060544   12.27 10.57 10.29   G 3 0
34 CD-40 7164 * 12 13 06.9634880688 -40 56 31.595580312   10.35 9.80     G 14 0
35 HD 107434 PM* 12 21 09.5690395512 -38 18 09.801617184   8.63 8.12     F6V 40 0
36 CD-49 7027 Or* 12 21 55.6590902616 -49 46 12.443074608   10.81 10.001   9.050 G9V 42 0
37 CD-47 7559 Or* 12 22 04.2988090656 -48 41 24.953627940   11.34 10.618   9.562 K1Ve 32 0
38 TWA 20 Or* 12 31 38.0691576600 -45 58 59.457923688   14.10 13.240   10.682 M3IVe 58 0
39 V* V1250 Cen TT* 12 34 20.4720080040 -48 15 19.545583716   13.3 12.2   11.80 M3 44 0
40 V* V1251 Cen TT* 12 34 20.6481372456 -48 15 13.531352148   13.3 12.2   11.90 M3.5 50 0
41 TWA 16 ** 12 34 56.302608 -45 38 07.63332   14.05 12.58 12.21 10.310 M2.5 56 0
42 V* V1252 Cen TT* 12 35 04.2560376888 -41 36 38.616010560   14.39 13.045   10.506 M2Ve 90 0
43 HD 109573B Or* 12 36 00.5491381248 -39 52 15.693558816         10.78 M2.5 91 0
44 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
45 CD-39 7793 ** 12 43 51.805200 -39 46 15.97332   10.895 10.057 10.008 8.996 K0V 10 0
46 HD 110817 Or* 12 45 06.7589417232 -47 42 58.201897716   11.16 10.388   9.411 K1Ve 37 0
47 HD 111265 PM* 12 48 20.0605203960 -42 37 33.826726704   10.72 10.13     G0V 8 0
48 HD 112227 * 12 55 24.4912296984 -36 27 20.607228900   9.977 9.718     A8/9V 14 0
49 HD 114335 PM* 13 10 19.4674593048 -32 48 19.597944240   9.13 8.60     F6V 31 0
50 Ross 1007 PM* 13 19 40.1255632811 +33 20 47.508282622   12.16   10.179   M2V 139 0
51 V* V1267 Cen TT* 13 20 45.3877266600 -46 11 37.711450572   14.0 12.7   10.78 K5IVe 49 0
52 V* V1268 Cen TT* 13 21 37.2192317688 -44 21 51.861714228     12.952   10.965 M0.5 45 0
53 HD 119850 PM* 13 45 43.7755597223 +14 53 29.471707437 10.989 9.894 8.50 7.465 6.363 M2V 402 0
54 HD 151288 PM* 16 45 06.3505410601 +33 30 33.213816014   9.48 8.11 8.388   K7.5Ve 194 0

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