2010A&A...513A..29M

Query : 2010A&A...513A..29M

2010A&A...513A..29M - Astronomy and Astrophysics, volume 513, A29-29 (2010/4-1)

RACE-OC project: rotation and variability in the open cluster M11 (NGC 6705).

MESSINA S., PARIHAR P., KOO J.-R., KIM S.-L., REY S.-C. and LEE C.-U.

Abstract (from CDS):

Rotation and magnetic activity are intimately linked in main-sequence stars of G or later spectral types. The presence and level of magnetic activity depend on stellar rotation, and rotation itself is strongly influenced by the strength and topology of the magnetic fields. Open clusters represent especially useful targets for investigating the connection among rotation, activity, and age. Over time, stellar activity and rotation evolve, providing us with a promising diagnostic tool to determine the age of the field stars. The open cluster M11 has been studied as a part of the RACE-OC project (Rotation and ACtivity Evolution in Open Clusters), which aims to explore the evolution of rotation and magnetic activity in the late-type members of open clusters with different ages. Photometric observations of the open cluster M11 were carried out in June 2004 using the LOAO 1 m telescope. The rotation periods of the cluster members were determined by Fourier analysis of photometric data time series. We investigated the relations between the surface activity, characterized by the light curve amplitude, and rotation. We have discovered a total of 75 periodic variables in the M11 FoV, of which 38 are candidate cluster members. Specifically, among cluster members we discovered 6 early-type periodic variables, 2 eclipsing binaries, and 30 bona-fide single periodic late-type variables. Considering the rotation periods of 16 G-type members of the almost coeval 200-Myr M34 cluster, we could determine the rotation period distribution from a more numerous sample of 46 single G stars at an age of about 200-230 Myr and determine a median rotation period of P=4.8d. A comparison with the younger M35 cluster (∼150Myr) and with the older M37 cluster (∼550Myr) shows that G stars rotate more slowly than younger M35 stars and more rapidly than older M37 stars. The measured variation in the median rotation period is consistent with the scenario of rotational braking of main-sequence spotted stars as they age. Finally, G-type M11 members have a level of photospheric magnetic activity, as measured by light curve amplitude, comparable to what is observed in the younger 110-Myr Pleiades stars of similar mass and rotation.

Abstract Copyright: ∼

Journal keyword(s): stars: activity - stars: late-type - stars: rotation - starspots - open clusters and associations: general - open clusters and associations: individual: M11

VizieR on-line data: <Available at CDS (J/A+A/513/A29): table1.dat table2.dat>

Simbad objects: 99

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Number of rows : 99
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 1039 OpC 02 42 07.4 +42 43 19           ~ 430 0
2 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3434 0
3 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
4 M 37 OpC 05 52 17.8 +32 32 42   6.19 5.6     ~ 401 2
5 NGC 2168 OpC 06 09 05.3 +24 20 10           ~ 558 0
6 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 514 1
7 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14407 0
8 Cl* NGC 6705 KKR 34773 V* 18 50 22.5089941023 -06 13 50.650577068   18.679 17.529     ~ 5 0
9 Cl* NGC 6705 KKR 14450 V* 18 50 27.796 -06 13 55.76   19.099 17.766     ~ 2 0
10 Cl* NGC 6705 KKR 29195 * 18 50 27.943 -06 05 40.81     17.12     ~ 1 0
11 Cl* NGC 6705 KKR 3662 V* 18 50 28.031 -06 10 09.14   17.662 15.499     ~ 2 0
12 Cl* NGC 6705 KKR 26072 V* 18 50 29.833 -06 24 46.87   20.695 19.324     ~ 2 0
13 Cl* NGC 6705 KKR 17649 V* 18 50 30.580 -06 19 03.98   19.508 18.143     ~ 2 0
14 Cl* NGC 6705 KKR 25585 V* 18 50 30.755 -06 19 07.60   20.421 18.621     ~ 2 0
15 Cl* NGC 6705 KKR 3860 V* 18 50 32.581 -06 14 57.60   18.309 16.143     ~ 2 0
16 Cl* NGC 6705 KKR 3867 LP* 18 50 32.7564887375 -06 20 05.070767116   17.704 15.299     ~ 3 0
17 Cl* NGC 6705 KKR 26026 V* 18 50 33.299 -06 24 22.86   19.397 18.310     ~ 2 0
18 Cl* NGC 6705 KKR 26158 V* 18 50 34.161 -06 25 35.99   18.989 17.943     ~ 2 0
19 NGC 6705 1896 V* 18 50 34.6082714328 -06 25 05.478527820   18.080 15.648     ~ 3 0
20 Cl* NGC 6705 KKR 1719 V* 18 50 35.151 -06 12 50.15   16.039 15.094     ~ 3 0
21 Cl* NGC 6705 KKR 19357 V* 18 50 35.405 -06 21 13.05   18.736 17.614     ~ 2 0
22 Cl* NGC 6705 KKR 3987 V* 18 50 35.453 -06 09 19.30   18.655 16.508     ~ 2 0
23 Cl* NGC 6705 KKR 23878 V* 18 50 36.522 -06 26 49.94   19.504 18.072     ~ 2 0
24 Cl* NGC 6705 KKR 4061 V* 18 50 37.144 -06 10 04.81   17.563 16.551     ~ 2 0
25 Cl* NGC 6705 KKR 1663 V* 18 50 38.184 -06 13 51.35   14.930 13.453     ~ 3 0
26 Cl* NGC 6705 KKR 4122 V* 18 50 38.537 -06 14 37.02   17.209 16.035     ~ 2 0
27 Cl* NGC 6705 KKR 1647 LP? 18 50 38.9172052361 -06 13 12.569423903   16.182 14.168     M6 6 0
28 Cl* NGC 6705 KKR 21243 V* 18 50 39.625 -06 23 35.99   18.213 17.088     ~ 2 0
29 Cl* NGC 6705 KKR 17546 V* 18 50 39.657 -06 18 53.31   19.590 18.057     ~ 2 0
30 Cl* NGC 6705 KKR 4197 V* 18 50 40.5762625512 -06 22 35.714331012   17.718 16.612     ~ 7 0
31 NGC 6705 1763 V* 18 50 40.7371880856 -06 14 44.265700356   16.454 15.361     ~ 4 0
32 Cl* NGC 6705 HV 13 EB* 18 50 41.0312713248 -06 21 53.024394996   18.890 17.305     ~ 3 0
33 Cl* NGC 6705 KKR 17730 V* 18 50 41.216 -06 19 05.59   19.575 18.032     ~ 2 0
34 Cl* NGC 6705 KKR 4244 V* 18 50 41.695 -06 12 57.87   16.665 15.842     ~ 2 0
35 Cl* NGC 6705 KKR 10161 V* 18 50 41.777 -06 08 03.78   19.465 17.799     ~ 2 0
36 Cl* NGC 6705 KKR 4291 LP* 18 50 42.8718553570 -06 15 42.646267101   18.004 16.355     ~ 3 0
37 Cl* NGC 6705 KKR 15633 V* 18 50 43.468 -06 15 50.88   19.010 17.002     ~ 2 0
38 GES J18504367-0616536 V* 18 50 43.6796104992 -06 16 53.614649352   17.452 16.376     ~ 7 0
39 Cl* NGC 6705 KKR 4370 V* 18 50 44.146 -06 12 07.95   17.335 16.581     ~ 2 0
40 Cl* NGC 6705 KKR 4374 V* 18 50 44.235 -06 14 34.73   17.398 16.521     ~ 2 0
41 NGC 6705 1660 V* 18 50 45.5855354376 -06 12 55.010892024   16.862 15.894     ~ 10 0
42 Cl* NGC 6705 KKR 4547 V* 18 50 47.746 -06 21 29.32   18.258 16.667     ~ 2 0
43 GES J18504779-0610337 V* 18 50 47.7985056816 -06 10 33.727160100   16.928 15.927     ~ 9 0
44 Cl* NGC 6705 KKR 4556 V* 18 50 47.9025737676 -06 11 07.225617303   18.094 16.319     ~ 4 0
45 Cl* NGC 6705 KKR 14095 V* 18 50 48.687 -06 13 24.10   18.493 17.497     ~ 2 0
46 Cl* NGC 6705 KKR 19570 V* 18 50 51.008 -06 21 31.20   18.121 17.173     ~ 2 0
47 Cl* NGC 6705 KKR 12646 V* 18 50 52.443 -06 11 23.12   18.019 17.040     ~ 2 0
48 Cl* NGC 6705 KKR 22541 V* 18 50 53.732 -06 25 09.70   19.068 17.855     ~ 2 0
49 Cl* NGC 6705 KKR 12485 V* 18 50 54.307 -06 11 09.85   18.110 17.084     ~ 2 0
50 Cl* NGC 6705 KKR 10861 V* 18 50 54.708 -06 09 02.51   18.989 17.956     ~ 2 0
51 NGC 6705 1433 V* 18 50 55.5929325960 -06 23 37.434714684   13.354 13.004     ~ 12 0
52 Cl* NGC 6705 KKR 10851 V* 18 50 55.996 -06 09 02.21   17.957 16.846     ~ 2 0
53 Cl* NGC 6705 KKR 35526 V* 18 50 56.030 -06 09 42.59   19.578 18.012     ~ 2 0
54 GES J18505677-0612361 V* 18 50 56.7799702104 -06 12 36.171568296   18.132 16.894     ~ 7 0
55 Cl* NGC 6705 KKR 27360 V* 18 51 01.356 -06 11 07.67   17.881 17.066     ~ 2 0
56 Cl* NGC 6705 KKR 30166 V* 18 51 01.500 -06 18 41.95   17.629 16.806     ~ 2 0
57 NGC 6705 OpC 18 51 03.8 -06 16 19   6.32 5.8     ~ 411 0
58 Cl* NGC 6705 KKR 5367 V* 18 51 03.950 -06 23 03.13   17.887 15.761     ~ 2 0
59 NGC 6705 1075 V* 18 51 04.3096419144 -06 25 05.217816900   16.476 14.404     ~ 4 0
60 Cl* NGC 6705 KKR 5477 V* 18 51 06.144 -06 10 08.84   18.035 16.108     ~ 2 0
61 Cl* NGC 6705 KKR 18776 V* 18 51 10.1540554878 -06 20 29.367896617   18.929 17.866     ~ 3 0
62 Cl* NGC 6705 KKR 8594 V* 18 51 10.248 -06 06 01.43   19.245 18.428     ~ 2 0
63 Cl* NGC 6705 KKR 13073 V* 18 51 12.981 -06 11 58.35   18.934 17.045     ~ 2 0
64 Cl* NGC 6705 KKR 530 V* 18 51 17.083 -06 13 39.61   17.192 14.791     ~ 4 0
65 Cl* NGC 6705 KKR 23809 V* 18 51 17.696 -06 26 45.79   19.790 18.401     ~ 2 0
66 Cl* NGC 6705 KKR 15291 V* 18 51 18.248 -06 15 18.63   18.921 17.363     ~ 2 0
67 Cl* NGC 6705 KKR 10052 V* 18 51 19.119 -06 07 55.82   18.270 16.989     ~ 2 0
68 NGC 6705 525 V* 18 51 21.04 -06 14 02.3   16.669 15.810     K3III 6 0
69 Cl* NGC 6705 KKR 6370 V* 18 51 22.449 -06 11 15.40   17.799 16.609     ~ 2 0
70 NGC 6705 493 V* 18 51 22.63 -06 21 50.8   16.181 15.557     ~ 5 0
71 GES J18512384-0625366 V* 18 51 23.8409209128 -06 25 36.864454944   17.123 16.104     ~ 8 0
72 Cl* NGC 6705 KKR 6440 V* 18 51 24.012 -06 13 20.38   17.638 15.826     ~ 2 0
73 Cl* NGC 6705 KKR 17415 V* 18 51 26.3806857139 -06 18 44.497176462   18.403 17.381     ~ 3 0
74 Cl* NGC 6705 KKR 30525 V* 18 51 29.387 -06 15 22.32   18.985 17.733     ~ 2 0
75 Cl* NGC 6705 KKR 6756 V* 18 51 31.434 -06 13 53.09   18.494 16.231     ~ 2 0
76 NGC 6705 290 V* 18 51 33.8397845256 -06 20 27.848450040   17.404 15.455     ~ 4 0
77 NGC 6705 253 V* 18 51 35.771 -06 09 12.64   17.144 16.059     ~ 3 0
78 NGC 6705 241 V* 18 51 36.2077249032 -06 16 40.371449628   17.280 15.263     ~ 4 0
79 Cl* NGC 6705 KKR 13951 V* 18 51 37.563 -06 13 11.24   19.465 18.243     ~ 2 0
80 Cl* NGC 6705 KKR 9517 V* 18 51 41.247 -06 07 18.46   18.252 16.622     ~ 2 0
81 Cl* NGC 6705 KKR 13511 V* 18 51 44.895 -06 12 34.27   18.464 17.576     ~ 2 0
82 Cl* NGC 6705 KKR 29011 V* 18 51 45.297 -06 21 07.52   18.877 17.704     ~ 2 0
83 NGC 6705 26 * 18 51 48.331 -06 13 23.45           ~ 2 0
84 NGC 6705 25 * 18 51 48.924 -06 19 37.85           ~ 2 0
85 NGC 6705 24 * 18 51 49.019 -06 17 36.65           ~ 2 0
86 NGC 6705 22 * 18 51 49.0703092008 -06 21 07.298280036           ~ 2 0
87 NGC 6705 23 * 18 51 49.148 -06 24 42.67           ~ 2 0
88 NGC 6705 21 * 18 51 49.262 -06 19 50.21           ~ 2 0
89 NGC 6705 20 * 18 51 49.3945267152 -06 15 44.637053220           ~ 3 0
90 NGC 6705 19 * 18 51 49.570 -06 13 03.46           ~ 2 0
91 NGC 6705 16 * 18 51 49.6251556032 -06 11 18.912626880           ~ 3 0
92 NGC 6705 17 * 18 51 49.6900527072 -06 17 20.577307344           ~ 2 0
93 NGC 6705 14 * 18 51 49.7193570288 -06 15 38.924622504           ~ 3 0
94 NGC 6705 18 * 18 51 49.788 -06 22 53.06           ~ 2 0
95 NGC 6705 15 * 18 51 49.818 -06 14 35.05           ~ 2 0
96 NGC 6705 13 * 18 51 49.9180777392 -06 18 50.043995532   12.25 11.87     ~ 7 0
97 NGC 6705 12 * 18 51 49.9667765904 -06 21 13.815445248           ~ 2 0
98 NGC 6705 11 * 18 51 50.0118302448 -06 23 34.030739544   16.99 15.47     ~ 3 0
99 NGC 6705 10 * 18 51 50.0210559696 -06 14 17.731170924           ~ 3 0

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