2004A&A...423..189E

Query : 2004A&A...423..189E

2004A&A...423..189E - Astronomy and Astrophysics, volume 423189-197 (2004/8-3)

Red giants in open clusters. XI. Membership, duplicity, and structure of NGC 2477.

EIGENBROD A., MERMILLIOD J.-C., CLARIA J.J., ANDERSEN J. and MAYOR M.

Abstract (from CDS):

New, accurate radial velocities and photoelectric UBV photometry of 83 red-giant candidates in the field of the rich, intermediate-age open cluster NGC 2477 ([Fe/H]=-0.05, age≃1Gyr) are presented and discussed. From 49 constant-velocity members we find a mean cluster velocity of +7.32±0.13km/s and confirm the membership of 76 of the stars. Among the cluster members, we identify 26 definite and 1 probable spectroscopic binaries and determine orbits for 13 of these systems, with periods ranging from 40 to 4578 days. The binary frequency is thus rather high (27/76=36%). The observed internal radial velocity dispersion of the cluster, as determined from the single member stars, is 0.93km/s, corrected for the small average observational error of 0.22km/s. Fitting King-type models to the observed stellar density distribution and velocity dispersion, and assuming a distance of 1.25kpc, we find the core and tidal radii of NGC 2477 to be 1.8 and 8.1pc, respectively, and estimate that the mass of cluster stars down to V=17, corresponding to ∼1M☉, is at least 5400M☉. The substantial differential reddening of NGC 2477 requires a more detailed study before definitive isochrone fits can be made.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: spectroscopic - techniques: radial velocities - star: late-type - Galaxy: open clusters and associations: individual: NGC 2477

VizieR on-line data: <Available at CDS (J/A+A/423/189): table1.dat table2.dat>

Simbad objects: 87

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Number of rows : 87
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 NGC 1817 OpC 05 12 33.9 +16 41 34           ~ 210 0
2 M 37 OpC 05 52 18.6 +32 32 36           ~ 436 0
3 Cl* NGC 2477 MMU 6502 * 07 51 25.8272344320 -38 39 51.657488316   12.966 11.49     ~ 15 0
4 NGC 2477 77 * 07 51 28.8530389464 -38 27 38.030079276   13.679 12.421 12.158   ~ 16 0
5 Cl* NGC 2477 MMU 7354 * 07 51 31.6743336168 -38 30 45.053236548   14.097 12.869     ~ 2 0
6 Cl* NGC 2477 MMU 6340 * 07 51 35.0872832064 -38 36 24.865917264   13.649 12.190     ~ 6 0
7 CD-38 3736 * 07 51 38.4957266496 -38 26 11.587069572   11.3 10.4     ~ 3 0
8 Cl* NGC 2477 MMU 7349 RB? 07 51 40.2064661208 -38 30 30.139571772   13.868 12.537     ~ 15 0
9 Cl* NGC 2477 MMU 7334 RB? 07 51 40.7236118928 -38 28 43.312239444   14.242 12.882     ~ 17 0
10 Cl* NGC 2477 MMU 7367 RB? 07 51 40.7832367992 -38 31 47.444057976   13 11.801     ~ 15 0
11 NGC 2477 991 RB? 07 51 47.0434768992 -38 33 53.371889100   12.55 11.39     ~ 22 0
12 Cl* NGC 2477 MMU 7273 RB? 07 51 47.4746570160 -38 32 36.246092496   13.568 12.338     ~ 19 0
13 Cl* NGC 2477 MMU 7266 RB? 07 51 49.2109483032 -38 32 08.549475000   13.48 12.290     ~ 20 0
14 Cl* NGC 2477 MMU 7310 RB? 07 51 49.2841139520 -38 26 59.540314632   13.792 12.440     ~ 13 0
15 NGC 2477 201 RB? 07 51 49.7488692240 -38 27 25.859278404   12.833 11.597     ~ 11 0
16 NGC 2477 215 RB? 07 51 50.9742634104 -38 30 31.262324724   13.98 12.7     ~ 17 0
17 Cl* NGC 2477 MMU 7203 RB? 07 51 52.9866743160 -38 28 31.321434720   13.896 12.617     ~ 12 0
18 Cl* NGC 2477 MMU 6040 RB? 07 51 54.0235097472 -38 34 22.801051344   12.88 11.9     ~ 9 0
19 Cl* NGC 2477 MMU 7206 RB? 07 51 54.4049993688 -38 28 51.412632456   14.081 12.830     ~ 12 0
20 Cl* NGC 2477 MMU 6251 SB* 07 51 55.1704241400 -38 36 14.356085400   13.727 12.531     ~ 12 0
21 CD-38 3745 MS* 07 51 56.0037312984 -38 36 50.472131508   11.814 10.853     ~ 20 0
22 Cl* NGC 2477 MMU 6020 SB* 07 51 56.9693902920 -38 32 37.660150248   13.613 12.474     ~ 16 0
23 Cl* NGC 2477 MMU 5345 RB? 07 51 58.9738277376 -38 40 02.943710112   13.764 12.518     ~ 16 0
24 Cl* NGC 2477 MMU 6088 RB? 07 51 59.0637352176 -38 35 51.786072168   13.611 12.438     ~ 15 0
25 NGC 2477 270 RB? 07 52 00.4994544936 -38 28 17.040245556   13.245 12.003     ~ 19 0
26 NGC 2477 272 RB? 07 52 00.7883303232 -38 28 49.095660972   13.525 12.282   11.024 ~ 31 0
27 Cl* NGC 2477 MMU 7064 RB? 07 52 02.4307811160 -38 30 20.413705896   13.828 12.621     ~ 12 0
28 NGC 2477 644 RB? 07 52 06.4934353392 -38 35 24.931056480   12.968 11.7     ~ 18 0
29 Cl* NGC 2477 MMU 6062 SB* 07 52 06.5509818192 -38 33 38.569474404   13.242 12.178     ~ 13 0
30 Cl* NGC 2477 MMU 5338 RB? 07 52 06.7205206608 -38 40 29.387952228   13.820 12.497     ~ 16 0
31 CD-38 3752 RB? 07 52 07.3149783816 -38 33 21.794011596   12.483 10.974     ~ 17 0
32 Cl* NGC 2477 MMU 6005 RB? 07 52 07.8140668032 -38 32 38.450856768   13.734 12.529     ~ 15 0
33 Cl* NGC 2477 MMU 8033 RB? 07 52 07.8521233248 -38 30 12.478496616   13.739 12.489     ~ 13 0
34 Cl* NGC 2477 MMU 5094 RB? 07 52 08.5848388248 -38 36 54.067592916   13.709 12.508     ~ 13 0
35 Cl* NGC 2477 MMU 5317 RB? 07 52 09.2368609008 -38 40 35.892121224   13.890 12.610     ~ 17 0
36 Cl* NGC 2477 MMU 5043 RB? 07 52 09.7076603712 -38 35 53.857089708   13.35 12.171     ~ 6 0
37 Cl* NGC 2477 MMU 8028 RB? 07 52 10.1002281192 -38 30 52.068726504   13.528 12.292     ~ 13 0
38 Cl* NGC 2477 MMU 6058 RB? 07 52 10.6940309040 -38 33 17.761016448   13.727 12.562     ~ 15 0
39 Cl* NGC 2477 MMU 7012 RB? 07 52 10.7002654536 -38 31 37.769282796   13.431 12.450     ~ 12 0
40 Cl* NGC 2477 KVI 3838 RB? 07 52 10.7489665752 -38 35 16.218892608   13.549 12.3     ~ 20 0
41 NGC 2477 OpC 07 52 11.4 -38 32 47   6.64 5.8     ~ 314 0
42 NGC 2477 396 RB? 07 52 13.2418096872 -38 28 32.175874740   13.41 12.2 11.91 10.88 ~ 18 0
43 Cl* NGC 2477 MMU 5073 SB* 07 52 14.2806299904 -38 37 12.238537044   12.96 11.66 12.05 10.97 ~ 11 0
44 Cl* NGC 2477 MMU 5074 RB? 07 52 14.3808751872 -38 37 20.993819988   13.665 12.467     ~ 13 0
45 Cl* NGC 2477 MMU 5076 RB? 07 52 14.7652374960 -38 37 45.165151704   13.61 12.392     ~ 15 0
46 CD-38 3753 RB? 07 52 14.8153343424 -38 38 48.899953536   12.798 11.311     ~ 21 0
47 Cl* NGC 2477 MMU 8216 RB? 07 52 15.5249031888 -38 27 26.377836444   13.541 12.250     ~ 16 0
48 NGC 2477 430 SB* 07 52 15.6261935904 -38 30 44.268413220     12.0 11.765   ~ 16 0
49 NGC 2477 431 SB* 07 52 15.7794871728 -38 30 54.939310380   13.74 12.6     ~ 18 0
50 NGC 2477 419 RB? 07 52 16.0428583056 -38 30 23.430378816   13.403 12.2     ~ 16 0
51 NGC 2477 418 SB* 07 52 17.0942858952 -38 30 08.428208148   13.661 12.469     ~ 16 0
52 CD-38 3754 RB? 07 52 17.8470598896 -38 33 24.913229976   11.988 10.811     G8II 29 0
53 NGC 2477 696 RB? 07 52 18.0708918768 -38 35 43.565491860   13.75 12.6     ~ 17 0
54 NGC 2477 695 SB* 07 52 18.8070955296 -38 36 14.990946804   12.98 11.40     ~ 27 0
55 CD-38 3756 RB? 07 52 18.8861159976 -38 28 22.201964508   11.68 9.82     K5III 32 0
56 Cl* NGC 2477 MMU 1008 RB? 07 52 18.9064563864 -38 31 36.216294852   13.421 12.387     ~ 10 0
57 Cl* NGC 2477 MMU 3003 SB* 07 52 20.2965931656 -38 32 44.133971064   13.513 12.396     ~ 6 0
58 Cl* NGC 2477 MMU 1014 RB? 07 52 20.6743381944 -38 31 11.639543772   13.553 12.352     ~ 13 0
59 NGC 2477 902 * 07 52 21.0641141736 -38 34 37.925246388   13.351 12.153     ~ 19 0
60 Cl* NGC 2477 MMU 2009 RB? 07 52 22.5065878512 -38 31 42.984910956   12.374 10.923     ~ 20 0
61 Cl* NGC 2477 MMU 4046 ** 07 52 24.667920 -38 36 18.53316   12.925 11.914 11.721   ~ 8 0
62 NGC 2477 752 SB* 07 52 26.6323875264 -38 29 45.027846060   13.09 11.8     ~ 25 0
63 Cl* NGC 2477 MMU 2036 RB? 07 52 26.8969277304 -38 31 47.185713804   13.387 12.161     ~ 14 0
64 NGC 2477 911 SB* 07 52 27.2914333176 -38 26 32.811807876   13.46 12.4     ~ 21 0
65 NGC 2477 882 RB? 07 52 30.5076559656 -38 36 56.962503000   13.192 12.0     ~ 20 0
66 Cl* NGC 2477 MMU 1252 RB? 07 52 30.7001743224 -38 27 57.684655692   13.005 11.513     ~ 16 0
67 Cl* NGC 2477 MMU 4248 RB? 07 52 32.0176027392 -38 39 53.615321064   13.871 12.628     ~ 16 0
68 NGC 2477 913 * 07 52 33.1949375328 -38 25 28.478441352   13.83 12.48     ~ 17 0
69 Cl* NGC 2477 MMU 3072 RB? 07 52 35.7727036104 -38 33 54.152801280   13.239 12.055     ~ 9 0
70 Cl* NGC 2477 KVI 1492 RB? 07 52 36.5274077976 -38 37 54.357311496   13.428 12.231   10.995 ~ 25 0
71 NGC 2477 938 SB* 07 52 37.5371195112 -38 36 41.448846672   13.05 11.8     ~ 16 0
72 NGC 2477 937 RB? 07 52 38.5484137056 -38 35 59.336753064   13.170 11.928     ~ 21 0
73 NGC 2477 917 * 07 52 39.0288520392 -38 22 53.167194192   13.407 11.828     ~ 16 0
74 Cl* NGC 2477 MMU 2064 SB* 07 52 40.2702320112 -38 31 47.170231392   13.48 12.3     ~ 16 0
75 Cl* NGC 2477 KVI 1019 RB? 07 52 41.8305112560 -38 32 12.957018288   13.909 12.714     ~ 21 0
76 Cl* NGC 2477 MMU 2062 RB? 07 52 42.1051330800 -38 31 56.223682788   13.801 12.529     ~ 11 0
77 NGC 2477 920 RB? 07 52 42.7448480304 -38 29 06.163475676   12.970 11.378     ~ 23 0
78 Cl* NGC 2477 MMU 3176 SB* 07 52 43.3510135392 -38 35 09.865279680   13.873 12.657     ~ 13 0
79 CD-38 3772 RB? 07 52 43.9195107936 -38 30 41.354909100   11.72 10.13     M3: 12 0
80 Cl* NGC 2477 MMU 2204 SB* 07 52 44.5772315064 -38 28 55.884130860   13.209 12.070     ~ 8 0
81 Cl* NGC 2477 MMU 3170 SB* 07 52 45.1397084904 -38 33 50.078607624   13.595 12.302     ~ 16 0
82 Cl* NGC 2477 MMU 3206 * 07 52 55.0334365632 -38 33 12.560856624   13.623 12.331     ~ 21 0
83 Cl* NGC 2477 HART 2351 * 07 53 04.8032679024 -38 30 13.088977812   13.300 12.005 11.698   ~ 7 0
84 Cl* NGC 2477 MMU 2359 * 07 53 11.1956125896 -38 30 32.120405856   14.121 12.707     ~ 14 0
85 Cl* NGC 2477 MMU 3311 * 07 53 11.2789805472 -38 33 59.724271764   14.022 12.756     ~ 9 0
86 Cl* NGC 2477 HART gam * 07 53 15.7774403136 -38 37 06.523932612   12.47 11.63     ~ 8 0
87 IC 4651 OpC 17 24 48.5 -49 55 23           ~ 374 0

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