2006ApJ...651..444G


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.20CET16:22:17

2006ApJ...651..444G - Astrophys. J., 651, 444-461 (2006/November-1)

A survey of chromospheric activity in the solar-type stars in the open cluster M 67.

GIAMPAPA M.S., HALL J.C., RADICK R.R. and BALIUNAS S.L.

Abstract (from CDS):

We present the results of a spectroscopic survey of the Ca II H and K core strengths in a sample of 60 solar-type stars that are members of the solar-age and solar-metallicity open cluster M67. We adopt the HK index, defined as the summed H+K core strengths in 1 Å bandpasses centered on the H and K lines, respectively, as a measure of the chromospheric activity that is present. We compare the distribution of mean HK index values for the M67 solar-type stars with the variation of this index as measured for the Sun during the contemporary solar cycle. We find that the stellar distribution in our HK index is broader than that for the solar cycle. Approximately 17% of the M67 Sun-like stars exhibit average HK indices that are less than solar minimum. About 7%-12% are characterized by relatively high activity in excess of solar maximum values, while 72%-80% of the solar analogs exhibit Ca II H+K strengths within the range of the modern solar cycle. The ranges given reflect uncertainties in the most representative value of the maximum in the HK index to adopt for the solar cycle variations observed during the period AD 1976-2004. Thus, ∼20%-30% of our homogeneous sample of Sun-like stars have mean chromospheric H+K strengths that are outside the range of the contemporary solar cycle. Any cycle-like variability that is present in the M67 solar-type stars appears to be characterized by periods greater than ∼6 yr. Finally, we estimate a mean chromospheric age for M67 in the range of 3.8-4.3 Gyr.

Abstract Copyright:

Journal keyword(s): Galaxy: Open Clusters and Associations: Individual: Messier Number: M67 - open clusters and associations: individual (NGC 2682) - Stars: Activity - Stars: Chromospheres - Sun: Activity

Simbad objects: 74

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Number of rows : 74

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Cl* NGC 2682 SAND 621 SB* 08 50 33.3131940427 +11 49 02.157134609 15.200 15.08 14.530   13.659 G1V 10 0
2 Cl* NGC 2682 SAND 603 * 08 50 40.4866628680 +11 42 11.582713879 14.678 14.63 14.068     G0V 12 0
3 Cl* NGC 2682 SAND 777 * 08 50 48.0205686887 +11 49 41.541635689 15.340 15.2 14.634   13.747 G2V 16 0
4 Cl* NGC 2682 ES I-42 * 08 50 52.3043891784 +11 45 03.594934243 15.555 15.32 14.639 14.577 13.915 G3V 19 0
5 Cl* NGC 2682 ES I-46 * 08 50 53.3447325187 +11 43 40.065214014 15.318 15.06 14.448   13.569 G0V 40 0
6 Cl* NGC 2682 SAND 779 * 08 50 56.6632779749 +11 49 54.677226239 15.603 15.32 14.657   13.899 G3V 20 0
7 Cl* NGC 2682 SAND 829 * 08 50 58.4936371274 +11 59 39.505095064 14.958 14.84 14.247   13.483 G0V 19 0
8 Cl* NGC 2682 SAND 748 SB* 08 50 59.6541698663 +11 44 08.074397012 15.910 15.46 14.762   13.758 G3V 11 0
9 Cl* NGC 2682 SAND 785 * 08 50 59.8074231216 +11 51 12.653373361 15.829 15.53 14.823 14.728 14.047 G4V 23 0
10 Cl* NGC 2682 YBP 1514 * 08 51 00.7627251015 +11 53 11.491460947 15.766 15.50 14.798   14.008 G5V 28 1
11 Cl* NGC 2682 YBP 1194 * 08 51 00.8053336097 +11 48 52.796026050 15.546 15.28 14.676   13.876 G5V 47 1
12 Cl* NGC 2682 ES IV-56 SB* 08 51 04.4887021077 +11 51 46.006933442 14.891 14.71 14.097   13.262 G4V 14 0
13 NGC 2682 64 SB* 08 51 05.7565198289 +11 43 46.965702110 14.970 14.75 14.053   13.254 ~ 43 0
14 Cl* NGC 2682 SAND 801 * 08 51 05.8193951603 +11 53 10.739412115 16.141 15.81 15.094     G6V 16 0
15 Cl* NGC 2682 SAND 724 Ro* 08 51 06.5375896810 +11 35 58.934970500   15.24 14.646     G2V 15 0
16 Cl* NGC 2682 SAND 937 V* 08 51 07.1326175198 +11 35 48.680225336 14.754 14.73 14.171   13.395 ~ 13 0
17 Cl* NGC 2682 SAND 1106 * 08 51 07.9548217536 +11 58 53.369016135 15.638 15.42 14.888   13.971 G4V 21 0
18 Cl* NGC 2682 SAND 942 Ro* 08 51 08.0230861663 +11 38 26.039980586 15.184 15.11 14.525   13.717 G3V 14 0
19 Cl* NGC 2682 SAND 1095 * 08 51 09.1436188376 +11 57 00.365236469 15.363 15.21 14.625   13.813 G3V 22 0
20 Cl* NGC 2682 ES I-19 * 08 51 09.9155984070 +11 46 16.961932338 15.463 15.24 14.564 14.506 13.785 G2V 35 0
21 Cl* NGC 2682 SAND 951 SB* 08 51 10.7813225228 +11 39 50.905280571 15.548 15.42 14.672   13.809 G3V 15 0
22 Cl* NGC 2682 SAND 1089 * 08 51 12.2908162178 +11 54 23.009443234 15.012 14.79 14.199   13.459 F9V 20 0
23 Cl* NGC 2682 SAND 1096 * 08 51 12.9844912887 +11 57 00.925938492 15.235 15.10 14.477   13.709 G2V 19 0
24 NGC 2682 488 * 08 51 14.3389375549 +11 41 09.223775876   15.14 14.530   13.731 G2V 23 0
25 NGC 2682 93 * 08 51 15.0498366526 +11 49 21.136610495 14.881 14.77 14.186   13.470 G2V 43 0
26 Cl* NGC 2682 SAND 1068 * 08 51 15.4382514747 +11 51 57.999259512 16.098 15.78 15.036   14.214 G8V 10 0
27 Cl* NGC 2682 ES I-227 SB* 08 51 16.8206222904 +11 45 41.702296726 15.122 14.87 14.221   13.346 G6V 18 0
28 Cl* NGC 2682 ES I-61 SB* 08 51 17.1951689937 +11 42 36.669274428 15.386 15.22 14.537   13.722 G3V 16 0
29 NGC 2682 OpC 08 51 18 +11 48.0           ~ 1995 0
30 Cl* NGC 2682 ES IV-15 SB* 08 51 18.2619135196 +11 50 19.699818584 15.050 14.94 14.292 13.914 13.547 F9V 22 0
31 Cl* NGC 2682 SAND 1093 * 08 51 18.7227202459 +11 55 49.732910251 14.906 14.73 14.134   13.449 G0V 18 0
32 Cl* NGC 2682 ES IV-17 * 08 51 20.0376010249 +11 51 01.699542377 15.093 14.97 14.366 13.928 13.545 F9V 16 0
33 Cl* NGC 2682 SAND 1107 V* 08 51 21.5044534839 +11 59 04.772101788 14.821 14.79 14.192     ~ 15 0
34 NGC 2682 137 SB* 08 51 21.7560474196 +11 51 42.045412130   14.7 14.098   13.281 G2V 22 0
35 Cl* NGC 2682 ES I-54 * 08 51 21.7685361209 +11 44 05.090717500 14.976 14.89 14.186   13.421 ~ 28 0
36 NGC 2682 142 * 08 51 23.1446712725 +11 54 05.026718692   14.8 14.230   13.469 G1V 22 0
37 Cl* NGC 2682 SAND 945 Ro* 08 51 23.8697478362 +11 38 52.155698546 15.302 15.17 14.554   13.713 G2V 23 0
38 Cl* NGC 2682 SAND 1112 RS* 08 51 24.1105849940 +12 01 30.648838485   15.76 15.043     G6V 14 0
39 NGC 2682 149a * 08 51 24.2996788183 +11 47 28.409410357 15.918 15.69 14.928 14.542 14.164 G5V 22 0
40 Cl* NGC 2682 ES I-58 * 08 51 24.6766584010 +11 43 06.230144955 15.696 15.45 14.737   13.840 G3V 17 0
41 Cl* NGC 2682 ES I-3 SB* 08 51 24.8436428261 +11 48 04.037875415 15.432 15.26 14.516 14.121 13.669 G2V 18 0
42 Cl* NGC 2682 ES I-51 SB* 08 51 24.9898349488 +11 45 42.995622087 14.793 14.73 14.122   13.449 G2V 21 0
43 Cl* NGC 2682 ES I-2 SB* 08 51 25.2700798765 +11 48 13.585828780 15.104 14.89 14.265 13.772 13.386 G4V 19 0
44 Cl* NGC 2682 ES IV-1 * 08 51 26.0436665050 +11 49 55.542649149 15.632 15.45 14.718 14.320 13.916 G3V 23 0
45 Cl* NGC 2682 ES III-36 * 08 51 27.4940608161 +11 53 02.482192371   14.80 14.243   13.474 F9V 18 0
46 Cl* NGC 2682 ES III-16 SB* 08 51 27.8696443951 +11 51 46.175021913   15.45 14.825   13.772 G3V 12 0
47 Cl* NGC 2682 SAND 943 Ro* 08 51 28.6113919773 +11 38 31.547839205 15.968 15.72 14.995   14.062 G5V 16 0
48 Cl* NGC 2682 ES III-10 SB* 08 51 29.8823564290 +11 50 22.902272064 15.461 15.17 14.506 13.977 13.540 G8V 14 0
49 Cl* NGC 2682 ES III-14 * 08 51 30.3226299325 +11 51 22.214059120 15.919 15.66 14.901 14.495 14.061 G4V 14 0
50 Cl* NGC 2682 SAND 1341 V* 08 51 30.7550165500 +12 04 16.079625988   15.48 14.807     G4V 16 0
51 Cl* NGC 2682 ES II-10 * 08 51 32.3798539341 +11 46 45.695853701 15.459 15.31 14.623 14.234 13.793 G5V 17 0
52 Cl* NGC 2682 ES II-4 * 08 51 32.5745658330 +11 48 24.134371054 14.861 14.81 14.191   13.482 G0V 23 0
53 Cl* NGC 2682 SAND 1307 * 08 51 32.8458500589 +11 53 44.759012054 16.250 15.98 15.167   14.297 G7V 11 0
54 Cl* NGC 2682 ES II-12 * 08 51 34.1203921614 +11 46 55.793546966 14.929 14.82 14.271 13.897 13.475 G2V 22 0
55 Cl* NGC 2682 SAND 1218 * 08 51 34.4996577331 +11 43 49.492789022 15.444 15.27 14.683   13.836 G2V 14 0
56 Cl* NGC 2682 SAND 1203 SB* 08 51 35.5401219612 +11 39 46.984240075 15.252 15.12 14.415   13.504 G4V 13 0
57 Cl* NGC 2682 ES II-7 * 08 51 36.0753568316 +11 47 47.049856350 15.268 15.14 14.486   13.745 G1V 34 0
58 Cl* NGC 2682 SAND 1318 SB* 08 51 36.3848623443 +11 56 50.841886744 14.610 14.62 14.070     ~ 12 0
59 NGC 2682 201 SB* 08 51 37.2507318106 +11 46 55.742655598 14.727 14.66 14.073   13.283 G1V 21 0
60 Cl* NGC 2682 ES II-14 * 08 51 41.4951945620 +11 47 36.174961813 14.804 14.71 14.188   13.382 G2V 28 0
61 Cl* NGC 2682 ES III-30 * 08 51 41.8957685294 +11 49 37.676880983 15.975 15.69 15.112   14.143 G5V 15 0
62 Cl* NGC 2682 SAND 1330 * 08 51 42.7945720938 +11 59 31.043302152 14.748 14.63 14.137   13.327 F9V 17 0
63 Cl* NGC 2682 ES II-42 SB* 08 51 47.4212104356 +11 47 09.699137859 15.366 15.09 14.473   13.437 G9V 16 0
64 Cl* NGC 2682 ES II-41 SB* 08 51 48.6663646137 +11 47 35.605363610 15.751 15.54 14.895   13.939 G4V 13 0
65 Cl* NGC 2682 SAND 1258 * 08 51 48.9449390408 +11 48 02.212283305   15.15 14.614   13.760 G3V 15 0
66 Cl* NGC 2682 SAND 1477 * 08 51 53.3033608423 +11 54 19.531879026 15.455 15.31 14.788   13.846 G2V 15 0
67 Cl* NGC 2682 SAND 1406 Ro* 08 51 55.2485300660 +11 35 33.544093040 14.686 14.65 14.100   13.372 ~ 11 0
68 Cl* NGC 2682 SAND 1420 * 08 51 56.1322707435 +11 39 04.161322658 14.840 14.74 14.287     ~ 10 0
69 Cl* NGC 2682 SAND 1473 * 08 51 56.2116054731 +11 53 35.786282768 16.134 15.83 15.055   14.228 G6V 12 0
70 Cl* NGC 2682 SAND 1449 * 08 51 56.5852008719 +11 47 24.997668539 15.149 15.00 14.381   13.649 G3V 20 0
71 Cl* NGC 2682 SAND 1462 SB* 08 51 58.7729633011 +11 50 02.549500093 15.135 14.99 14.318   13.544 ~ 21 0
72 Cl* NGC 2682 SAND 1452 SB* 08 52 03.5003773494 +11 47 48.147950343 15.365 15.20 14.693   13.824 G2V 17 0
73 Cl* NGC 2682 SAND 1446 * 08 52 09.6149958522 +11 46 46.240531019 14.701 14.66 14.169   13.318 ~ 13 0
74 Cl* NGC 2682 SAND 1426 * 08 52 11.3962133856 +11 40 32.089833804 14.916 14.852 14.234   13.502 F9V 12 0

    Equat.    Gal    SGal    Ecl

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2020.01.20-16:22:17

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