2012AJ....144....8S

Query : 2012AJ....144....8S

2012AJ....144....8S - Astron. J., 144, 8 (2012/July-0)

New members of the Scorpius-Centaurus complex and ages of its sub-regions.

SONG I., ZUCKERMAN B. and BESSELL M.S.

Abstract (from CDS):

We have spectroscopically identified ∼100 G-, K-, and M-type members of the Scorpius-Centaurus complex. To deduce the age of these young stars we compare their Li λ6708 absorption line strengths against those of stars in the TW Hydrae association and β Pictoris moving group. These line strengths indicate that Sco-Cen stars are younger than β Pic stars whose ages of ∼12 Myr have previously been derived from a kinematic traceback analysis. Our derived age, ∼10 Myr, for stars in the Lower Centaurus Crux and Upper Centaurus Lupus subgroups of ScoCen is younger than previously published ages based on the moving cluster method and upper main-sequence fitting. The discrepant ages are likely due to an incorrect (or lack of) cross-calibration between model-dependent and model-independent age-dating methods.

Abstract Copyright: ∼

Journal keyword(s): open clusters and associations: individual (Scorpius OB2, Lower Centaurus-Crux) - open clusters and associations: individual (Upper Centaurus-Lupus, Upper Scorpius) - stars: activity - stars: kinematics and dynamics - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/AJ/144/8): table1.dat>

Nomenclature: Table 1: [SZB2012] NNN (Nos 1-104).

Simbad objects: 138

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Number of rows : 138
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 THA MGr 00 00 -62.0           ~ 540 0
2 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
3 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 623 0
4 * eta Cha Pu* 08 41 19.5125857944 -78 57 48.105898056 5.02 5.351 5.453     B8V 246 0
5 V* BX Ant TT* 10 18 28.6987521312 -31 50 02.830052544   13.39 11.454 11.382 9.325 M0Ve 130 0
6 V* CE Ant TT* 10 42 30.1018928760 -33 40 16.229805204   12.21 10.91   9.10 M2Ve 252 1
7 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
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 3 ** 11 10 27.894072 -37 31 51.96612   13.53 12.05 11.61 9.29 M4Ve+M4Ve 218 0
12 TWA 3A TT* 11 10 27.9121410480 -37 31 51.535547940   14.04 12.57   9.10 M4Ve 221 0
13 V* V1215 Cen TT* 11 13 26.2208680752 -45 23 42.720964188     12.478   10.483 K8IVe 89 0
14 V* V1217 Cen Or* 11 21 05.4814169256 -38 45 16.522915140   14.04 12.58 12.34 10.515 M1Ve 86 0
15 CD-34 7390 ** 11 21 17.24 -34 46 45.5     11.080   9.038 M1Ve+M1Ve 65 0
16 HD 98800 TT* 11 22 05.28975 -24 46 39.7571   10.20 9.28 9.26 7.386 K5V(e) 401 0
17 CD-33 7795 TT* 11 31 55.2608963280 -34 36 27.203892120   12.97 11.524 11.150 9.150 M2Ve 205 0
18 TWA 30 Y*O 11 32 18.3115839696 -30 19 51.857770620       14.205 11.30 M5V 75 0
19 CD-26 8623 TT* 11 32 41.2658824800 -26 51 55.961893800   13.69 12.23 11.14 9.637 M3Ve 118 0
20 TWA 19B Em* 11 47 20.5931919840 -49 53 04.336507860   13.82 12.30   10.21 K7e 30 0
21 HD 102458 Or* 11 47 24.5438206248 -49 53 03.018484572   9.70 9.07   8.40 G4V 102 0
22 CD-36 7429A TT* 11 48 24.2227406904 -37 28 49.114270524   12.54 11.17 10.92 9.552 K5V 145 0
23 CD-36 7429 ** 11 48 24.22320 -37 28 49.1537           ~ 98 0
24 CPD-52 5025 Y*O 11 55 57.7071663168 -52 54 00.915635880   12.06 11.00     K4V 18 0
25 TWA 45 Em* 11 59 27.8704643568 -45 10 19.244599752   16.19 14.54     ~ 14 0
26 RX J1205.2-5331 Y*O 12 05 12.5372787888 -53 31 23.433181500       12.73   K4IVe 12 0
27 HD 105070 Or* 12 05 47.4817082016 -51 00 12.070921608   9.50 9.005   8.216 G2IV 43 1
28 [SZB2012] 8 Y*O 12 08 20.60 -58 50 15.1   17.02 15.35     ~ 1 0
29 1RXS J121010.3-485538 Y*O 12 10 10.6607783376 -48 55 47.556028056   12.10 11.08 10.86   K3IV(e) 12 0
30 CD-54 4621 Or* 12 12 35.7599042112 -55 20 27.293187660   11.44 10.498   9.328 K0Ve 41 0
31 ASAS J121248-6230.4 Or* 12 12 48.8119029168 -62 30 31.970622492   12.63 11.33 10.97 9.775 K7Ve 14 0
32 1RXS J121356.3-625508 Or* 12 13 57.0056117160 -62 55 12.924511608   12.42 11.620   10.212 K4Ve 21 0
33 2MASS J12143187-5110156 Y*O 12 14 31.8650065344 -51 10 15.684453012   14.172 12.842 12.194   ~ 17 0
34 CD-50 6815 Or* 12 14 34.0907023656 -51 10 12.505288980   11.20 10.275   9.167 G9V 42 0
35 HD 106444 Y*O 12 14 50.7229738080 -55 47 23.527662720   8.94 8.155   7.535 F5V 49 0
36 CD-55 4499 Or* 12 14 52.3085633712 -55 47 03.633282888   10.45 9.64     G9V(e) 40 0
37 PM J12160-5614 Or* 12 16 01.1627221992 -56 14 07.023872868   12.290 11.169 10.959 9.842 K5Ve 23 0
38 ASAS J121616-5055.3 Ro* 12 16 17.0203539000 -50 55 26.422501584   16.26 14.060 14.68 12.10 ~ 5 0
39 TYC 8986-497-1 Or* 12 16 30.0521873736 -67 11 47.765846292   12.19 11.09     K4IVe 16 0
40 RX J1216.6-7007 Y*O 12 16 40.2567345624 -70 07 36.204666348   11.78 10.72     K3IV(e) 20 0
41 CD-56 4401 Or* 12 18 58.0240118448 -57 37 19.146216972   10.76 9.853   8.765 K1IV(e) 20 0
42 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
43 CPD-64 1859 Or* 12 19 21.6378016896 -64 54 10.321434324 11.48 10.87 9.90   8.907 K3V 21 0
44 RX J1220.0-5018B Y*O 12 19 59.3701453392 -50 18 37.570717404   14.27 12.89     K7 7 0
45 TYC 8983-795-1 Or* 12 20 54.5082160272 -64 57 24.151803156 12.63 11.85 10.77     K4Ve 19 0
46 V* FP Cru BY* 12 21 30.796464 -64 03 52.76808 12.66 11.88 10.75 10.42 9.31 K3.5IVe 9 0
47 CD-49 7027 Or* 12 21 55.6590902616 -49 46 12.443074608   10.81 10.001   9.050 G9V 42 0
48 CD-47 7559 Or* 12 22 04.2988090656 -48 41 24.953627940   11.34 10.618   9.562 K1Ve 32 0
49 2MASS J12222884-5739121 Y*O 12 22 28.8470987328 -57 39 12.179973204   15.75 14.21 13.94   ~ 7 0
50 2MASS J12223992-6020244 Y*O 12 22 39.9287196288 -60 20 24.399807000   16.35 14.93 14.64   ~ 7 0
51 RX J1223.2-5540 Y*O 12 23 14.312280 -55 40 16.37904   15.60 14.16 13.98   K5 6 0
52 TYC 8983-854-1 Em* 12 23 47.4874785312 -64 02 54.921222996   11.94 10.78     K3IVe 13 0
53 2MASS J12271665-6239142 Y*O 12 27 16.6410724824 -62 39 14.176814940   12.17 10.89     K3IV(e) 12 0
54 CD-62 657 Or* 12 28 25.3945932456 -63 20 58.738038180   10.129 9.357   8.525 G7V 27 0
55 HD 108611 Or* 12 29 02.2523641896 -64 55 00.636825720   9.75 9.05     G5V 42 1
56 CPD-56 5307 Or* 12 33 33.8124157608 -57 14 06.563741856   11.91 10.89   9.736 K1V(e) 19 0
57 1RXS J123420.1-481514 ** 12 34 20.65 -48 15 13.6           M3.0 16 0
58 TWA 16 ** 12 34 56.302608 -45 38 07.63332   14.05 12.58 12.21 10.310 M2.5 56 0
59 V* V1252 Cen TT* 12 35 04.2560376888 -41 36 38.616010560   14.39 13.045   10.506 M2Ve 90 0
60 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
61 CPD-63 2367 Or* 12 36 38.9779337112 -63 44 43.520073000   10.83 10.028   8.951 K2V 18 0
62 CPD-53 5235 Or* 12 36 58.9657085280 -54 12 18.000711900   11.33 10.414   9.355 K0V 27 0
63 1RXS J123834.9-591645 Or* 12 38 35.5614978480 -59 16 43.926264012   12.70 11.587   10.330 K3Ve 18 0
64 ASAS J124413-6902.2 Y*O 12 44 14.5794805512 -69 02 35.554679736   14.72 13.21 12.89 11.009 M2 8 0
65 V* FI Cru Or* 12 44 34.8060686304 -63 31 46.231540320   11.97 10.78   9.534 K3Ve 23 0
66 ASAS J124547-5411.0 Or* 12 45 48.8341396848 -54 10 58.518461820   12.433 11.424 11.110 10.026 K2V(e) 24 0
67 TYC 9228-1355-1 Em* 12 47 21.9565581816 -68 08 40.064977572   12.02 10.88     K4IVe 13 0
68 2MASS J12473599-5050518 Y*O 12 47 35.9856102912 -50 50 51.870302736   16.49 14.92 14.44   ~ 5 0
69 RX J1247.7-5431 Or* 12 47 48.2497762512 -54 31 30.710381340   12.993 11.752 11.343   M0Ve 14 0
70 HD 111227 Or* 12 48 07.7926675992 -44 39 16.795090548   10.54 9.844   8.786 K0IV(e) 26 0
71 V* V1257 Cen Or* 12 50 51.4373973336 -51 56 35.326827456   12.69 11.68   10.301 K5Ve 27 0
72 UCAC4 186-087394 Em* 12 51 05.5672542240 -52 53 12.175430892   13.275 12.088 11.713   K5IVe 18 0
73 2MASS J12511246-5630467 Y*O 12 51 12.5108836152 -56 30 46.516400784   13.98 12.58 12.34   ~ 9 0
74 2MASS J12520059-5615576 Y*O 12 52 00.6021459648 -56 15 57.701938356   15.52 14.06 13.98   ~ 7 0
75 [FS2003] 0652 Em* 12 52 14.7140403816 -55 53 37.468280472   13.95 12.54     M0 8 0
76 1RXS J125554.9-535536 Y*O 12 55 55.9438276824 -53 55 31.187841204   15.87 14.29 13.98   ~ 7 0
77 RX J1256.1-6926 Or* 12 56 08.3082110592 -69 26 54.060882900   12.80 11.831   10.048 K7Ve 19 0
78 HD 112245 Or* 12 56 09.3962010432 -61 27 25.473461148   10.24 9.519   8.543 K0Ve 31 0
79 CD-69 1055 Or* 12 58 25.5840183960 -70 28 49.148391324   10.77 9.992   8.941 K0Ve 50 0
80 2MASS J12593573-6808010 Em* 12 59 35.7308114688 -68 08 01.119284988   16.21 14.56     M4 11 0
81 CPD-52 6110 Or* 13 01 50.6980984080 -53 04 58.162656612   11.98 11.08   10.154 K3V(e) 43 0
82 HD 312273 Em* 13 02 47.0232862920 -62 13 59.053010412   11.03 10.17 9.85 9.40 K0IV 14 0
83 ASAS J131400-6846.5 Y*O 13 14 01.1173501248 -68 46 38.468325288   12.20 11.27   10.014 G9Ve 13 0
84 CD-50 7600 Or* 13 14 23.8377410136 -50 54 01.945210428   11.24 10.302   9.330 G9IV(e) 22 0
85 V* V1267 Cen TT* 13 20 45.3877266600 -46 11 37.711450572   14.0 12.7   10.78 K5IVe 49 0
86 TYC 8674-2317-1 Em* 13 21 20.2660916064 -59 03 44.148230316   11.86 10.81     ~ 16 0
87 V* V1268 Cen TT* 13 21 37.2192317688 -44 21 51.861714228     12.952   10.965 M0.5 45 0
88 HD 116402 Y*O 13 24 35.1210507312 -55 57 24.161753592   10.23 9.658   8.988 G3V 48 0
89 CD-48 8201 Or* 13 27 05.9505698400 -48 56 18.111378336   11.66 10.728   9.338 K3Ve 22 0
90 CD-41 7947 Or* 13 34 31.8880438128 -42 09 30.690277992   11.67 10.70 10.42   K2IVe 25 0
91 CD-40 8031 Or* 13 37 57.2943420144 -41 34 41.898243792   10.93 10.006   9.040 K0IV 42 0
92 TYC 7800-858-1 Em* 13 38 05.9592274080 -43 44 56.446205388   12.24 11.13     K3IV 17 0
93 TYC 7796-286-1 Em* 13 38 49.3708362720 -42 37 23.435218812   12.49 11.35     K3.5IV 16 0
94 TYC 8261-1690-1 Or* 13 40 25.5432660096 -46 33 51.345980712   12.48 11.38     K3Ve 10 0
95 CD-46 8827 Y*O 13 44 24.4321548024 -47 06 34.011137520   11.45 10.50     K2IVn 13 0
96 1RXS J134442.5-634758 Or* 13 44 42.7967106480 -63 47 49.449431184   12.00 10.969   9.511 K4Ve 21 0
97 CD-51 7721 Or* 13 45 55.9903913472 -52 22 25.482244584   12.46 11.235   10.066 K3Ve 14 0
98 CD-47 8710 Y*O 13 54 42.0965583528 -48 20 57.809752152   11.96 11.06   9.963 K2Ve 18 0
99 TYC 8271-864-1 Em* 13 56 34.6923124848 -49 07 14.901656736   12.54 11.54 11.27   K3IV(e) 8 0
100 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
101 TYC 7818-504-1 Em* 14 30 13.5255882528 -43 50 09.923955108   11.53 10.46     K5 6 0
102 [SZB2012] 73 Y*O 14 50 34.04 -34 58 56.1   13.48 12.10     ~ 1 0
103 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
104 V* MP Lup TT* 15 24 32.3572754448 -36 52 02.770376232 12.69 11.96 11.231 10.78 10.184 K0V(e) 31 0
105 HD 138204 PM* 15 32 04.1861397384 -38 37 21.147088080   6.424 6.219     A3III 38 0
106 UPM J1533-3917 Y*O 15 33 40.5251239392 -39 17 46.838228136   15.86 14.42     ~ 4 0
107 RX J1539.7-3450 TT* 15 39 46.372800 -34 51 02.53332 11.77 13.58 12.35 12.08 10.688 ~ 15 0
108 V* KW Lup TT* 15 45 47.6002137432 -30 20 55.746457152   10.34 9.37   7.956 K2V 77 0
109 CD-24 12289 Y*O 15 47 07.4688958896 -25 19 46.771484592   12.10 11.222   9.706 K4Ve 13 0
110 CD-30 12558 TT* 15 49 02.7149736240 -31 02 53.785935780   11.91 11.029   9.961 K0IVe 13 0
111 V* NZ Lup BY* 15 53 27.2916958608 -42 16 00.710765508   8.48 7.975   7.213 G2 112 0
112 1RXS J155642.8-424233 Y*O 15 56 44.0165098937 -42 42 30.139170504   13.37 12.130   10.296 K6IVe 10 0
113 CD-36 10569 TT* 15 59 49.5108561504 -36 28 27.904409112 13.01 12.06 11.12 10.32 9.66 K3e 41 0
114 HD 325367 Or* 16 03 05.4915085848 -40 18 25.426727676   11.40 8.50     M0 406 0
115 1RXS J160633.4-203636 Y*O 16 06 31.6906138416 -20 36 23.291827776   14.561 13.146 12.488 11.006 K6 22 0
116 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
117 CD-27 10866 TT* 16 14 59.1828176592 -27 50 22.940776140   12.09 11.205   10.052 K0IV(e) 56 0
118 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
119 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
120 CD-24 12683 TT* 16 25 19.2498737256 -24 26 52.809731340   11.36 10.55   9.05 G9V 52 0
121 CD-30 13152C Y*O 16 26 57.0056596464 -30 32 23.362393740   13.89 12.46 11.819   K6IVe 9 0
122 CD-30 13152A Y*O 16 26 57.6369561456 -30 32 27.854193012   12.43 11.22 11.49   M0IVe 8 0
123 CD-33 11275 Y*O 16 35 22.472760 -33 28 52.90320   12.53 11.31 11.26 9.925 K4Ve 9 0
124 GSC 07854-02093 Y*O 16 39 47.3128678080 -39 20 40.392642300   15.63 14.08 13.02   M0Ve 7 0
125 ASAS J165211-3359.4 Ro* 16 52 10.863408 -33 59 33.46800   13.38 11.98 11.33 10.200 M0e 4 0
126 CD-25 12033 Y*O 17 13 32.8293540288 -26 02 07.161635580   11.02 10.14   9.199 K0V 10 0
127 CD-27 11535 Y*O 17 15 03.6088321069 -27 49 39.737104983   11.68 10.596   9.129 K5Ve 25 0
128 HD 155915 PM* 17 18 14.6477805192 -60 27 27.481458780   10.29 9.355   8.515 G8V 46 0
129 WRAY 15-1674 Y*O 17 19 42.0537558744 -46 15 27.669423816   14.52 12.93     ~ 12 0
130 [SZB2012] 96 Y*O 17 24 53.51 -39 14 43.8   13.11 11.88     ~ 1 0
131 CD-54 7336 Y*O 17 29 55.0775553600 -54 15 48.649620708   10.38 9.614   8.665 K1V 51 0
132 HD 159911 SB* 17 37 46.4747505936 -13 14 46.596572772   11.17 10.023   8.590 K7e 28 0
133 HD 160305 Em* 17 41 49.0384375440 -50 43 28.040970972   8.91 8.405   7.736 F8/G0V 53 1
134 HD 161460 Y*O 17 48 33.7487706842 -53 06 43.372347052   10.44 8.945   7.954 K0IV 34 0
135 ASAS J175134-4854.9 PM* 17 51 34.2217538904 -48 54 55.899386172   14.33 12.86 12.50 10.606 M3e 9 0
136 ASAS J181422-3246.2 Em* 18 14 22.0736727072 -32 46 10.132941432   14.14 12.78 12.316 10.380 M1Ve 56 0
137 UPM J1818-3710 Y*O 18 18 35.4050472792 -37 10 12.696032388   16.124 14.505 14.402   ~ 11 0
138 CD-31 16041 Y*O 18 50 44.4830287248 -31 47 47.382005112   12.25 11.191 10.745 9.432 K8Ve 56 0

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