2008A&A...491..951M


Query : 2008A&A...491..951M

2008A&A...491..951M - Astronomy and Astrophysics, volume 491, 951-960 (2008/12-1)

Membership, binarity, and rotation of red dwarfs in the nearby open cluster Coma Berenices (Melotte 111).

MERMILLIOD J.-C., GRENON M. and MAYOR M.

Abstract (from CDS):

Although several attempts have been made to identify solar-type members on the main sequence of the nearby open cluster Coma Berenices (Mel 111), the population of the lower main sequence is still poorly known. We observed 46 new candidates to search for new members and monitored known spectroscopic-binary members to determine orbital parameters. We obtained a total of 903 radial-velocity measurements of 69 solar-type stars in the field of Mel 111 with the CORAVEL spectrovelocimeter over 20 years. Among the 35 stars from Trumpler's list, 23 are members according to their radial velocities and photometry. We were able to confirm the membership of only 8 stars among the 46 candidates observed. Six double-lined and ten single-lined spectroscopic binaries were discovered. Six only are members and an orbit was determined for them and for 4 double-lined non-members. The binary frequency is 22% (7/32). The cluster mean radial velocity is +0.01±0.08km/s based on 28 members. The lower main sequence of the Coma Berenices open cluster is still rather poorly populated. The cluster size may be much larger that usually accepted. Accordingly extensive programmes to determine precise proper motions, radial velocities and photometry should be undertaken to identify faint cluster members outside the cluster central area. If a significant population of faint members cannot be identified, Coma Ber could be a prominent example of dynamical evolution leading to star evaporation.

Abstract Copyright:

Journal keyword(s): Galaxy: open clusters and associations: individual: Coma Berenices (Melotte 111) - stars: binaries: spectroscopic - technique: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/491/951): table1.dat>

Nomenclature: Table 1: Cl* Melotte 111 MGM NNN N=42 among (Nos 203-437).

Simbad objects: 67

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Number of rows : 67
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 107 * 00 05 47.7696753360 -71 45 57.132980424   10.87 10.76     B9V 8 0
2 HD 106 * 00 05 49.7048903712 -52 49 12.231560820   9.86 9.41     F6V 15 0
3 HD 105 PM* 00 05 52.5447817152 -41 45 11.044988352   8.13 7.53     G0V 162 0
4 HD 113 ** 00 05 55.47302 +18 04 33.1428   9.51 8.58     K0 44 0
5 HD 111 * 00 06 00.5345910936 +28 16 37.021625148   8.11 6.59 10.7   K5III 12 0
6 HD 110 ** 00 06 04.2525777432 +40 25 06.719989872   7.584 6.658     G5 13 0
7 HD 331 * 00 08 02.5840576896 +37 16 18.557404248   9.30 9.12     A3 4 0
8 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3185 0
9 Cl Melotte 25 OpC 04 29 47 +16 56.9           ~ 2844 0
10 NGC 2632 OpC 08 40 13 +19 37.3           ~ 1385 0
11 BD+35 2278 * 11 44 57.1920416280 +35 00 22.321721880   10.95 10.1     G8III 3 0
12 V* MS Com gD* 12 06 00.8356637592 +23 12 16.430289480   7.79 7.48     F5 40 0
13 HD 106293 * 12 13 43.9003054608 +22 53 16.783110456   8.48 8.08     F5V 42 0
14 BD+25 2479 SB* 12 16 49.4367818400 +24 51 20.947096548   11.3 10.5     G8III 14 0
15 BD+27 2113 SB* 12 18 51.0416469264 +26 19 24.538034352 12.51 11.77 10.82     K1V 7 0
16 Cl* Melotte 111 AV 1003 RG* 12 18 57.2680487136 +25 53 11.016032640     11.5 10.80 10.30 K4.9 11 0
17 Cl Melotte 111 293 HB* 12 18 58.6965893088 +26 03 30.859501500   12.65 11.7     K2.7 9 0
18 2MASS J12190518+2611044 RG* 12 19 05.1814390848 +26 11 04.392183840   12.40 11.4     G8III: 8 0
19 Cl* Melotte 111 AV 1023 * 12 19 08.5186660176 +25 03 11.676252132     12.3     K0 4 0
20 Cl Melotte 111 203 * 12 19 16.2564723528 +25 26 10.459129956   11.68 10.8     G9V 15 0
21 Cl Melotte 111 222 RG* 12 20 05.7123465024 +25 54 36.755480196   12.24 11.3     G8III 8 0
22 Cl* Melotte 111 AV 1142 * 12 20 39.6511944768 +27 45 58.854393792   12.27 11.41     K0III 6 0
23 Arty 132 * 12 21 15.6150145776 +26 09 14.046253164   12.50 11.5 10.87 10.41 K3.5 26 0
24 HD 107512 * 12 21 20.9098687608 +32 10 35.222061252   9.65 9.1     G0 19 0
25 2MASS J12222581+2519033 RG* 12 22 25.8161903592 +25 19 03.460137456   12.50 11.6     G8III 7 0
26 Cl Melotte 111 311 * 12 22 40.6477186440 +25 40 11.813967660   11.3 10.4     G8V 8 0
27 DO 14562 RG* 12 22 59.4118083864 +24 58 58.494194652     11.3     K5.4 11 0
28 Cl* Melotte 111 MGM 420 * 12 23 28.2045009480 +25 53 39.917730948   11.28 10.51 11.43 11.00 K4.1 13 0
29 Cl Melotte 111 OpC 12 24 03 +25 39.1           ~ 439 0
30 BD+26 2342 * 12 24 05.7338390664 +26 07 42.918489804   11.26 10.46     ~ 38 0
31 BD+25 2502 * 12 24 17.1449174184 +24 19 28.335291132   10.67 9.93 9.44 9.08 K0.5 27 0
32 Cl Melotte 111 358 * 12 24 22.9523891472 +25 54 56.285445852   12.85 12.34     ~ 4 0
33 Cl* Melotte 111 MGM 421 * 12 26 51.0269019288 +26 16 01.799963436   12.83 11.73 11.07 10.56 K4.8 22 0
34 Arty 577 SB* 12 27 26.2845591168 +24 46 56.958756168   12.70 11.44     K4 6 0
35 BD+29 2290 * 12 27 48.2946577200 +28 11 39.891263784   10.40 9.6     G5.4 26 0
36 2MASS J12275265+2505449 RG* 12 27 52.6643422128 +25 05 44.912908176   12.00 11.2     G6 11 0
37 BD+28 2119 * 12 28 21.1109962896 +28 02 26.086057476   11.24 10.43     G7IV: 18 0
38 BD+30 2276 * 12 28 25.5553157064 +29 53 54.360363264   11.4 10.7     G8III 8 0
39 BD+30 2277 ** 12 28 27.5185 +29 52 42.367   11.3 10.1     G7III 13 0
40 BD+27 2139 * 12 28 56.4263196744 +26 32 57.395882868   11.67 10.8 10.53 10.25 G9IV 28 0
41 2MASS J12294466+2532355 RG* 12 29 44.6606869152 +25 32 35.619072756   12.72 11.17     K0III 8 0
42 HIP 61012 * 12 30 14.0984884752 +25 01 42.249351144   11.17 10.4     G7V 17 0
43 BD+36 2278 * 12 32 31.0724294328 +35 19 52.311815004   10.14 9.7     G0 35 0
44 Cl* Melotte 111 AV 2129 * 12 33 00.6266427432 +27 42 44.759733660   12.42 11.18 10.42 9.80 K2.9 17 0
45 Cl* Melotte 111 MGM 423 SB* 12 33 30.1866801216 +26 10 00.049694520   12.17 11.18 10.59 10.14 K3.7 10 0
46 Cl* Melotte 111 MGM 427 * 12 33 54.2156059608 +27 08 04.810848432   12.63 11.80     K3.3 8 0
47 Cl* Melotte 111 MGM 414 * 12 34 46.9248919176 +24 09 37.696784220       11.38 10.87 K4.6 6 0
48 HD 109497 PM* 12 35 00.3335115000 +30 11 33.614238768   9.10 8.6     F6IV 36 0
49 Cl* Melotte 111 MGM 415 SB* 12 36 52.5073361088 +24 01 27.069573504           ~ 3 0
50 Cl* Melotte 111 MGM 424 PM* 12 38 55.3776242616 +25 53 37.847336100   11.87 10.9     K0III 6 0
51 Cl* Melotte 111 MGM 432 PM* 12 39 45.9080998632 +28 17 56.781568788   11.98 11.2     G8III 13 0
52 HD 110195 SB* 12 40 13.0076847384 +28 13 21.017602884   10.87 10.13     G9V 15 0
53 BD+26 2379 * 12 41 04.9741704672 +25 42 17.950373388   11.00 10.2     G5 8 0
54 HD 111154 * 12 47 06.7303883088 +22 37 00.582158676   8.96 8.40     G0V 41 0
55 BD+36 2312 * 12 50 39.2993332080 +35 55 38.368041060   11.23 10.5     G6III 6 0
56 Cl* Melotte 111 MGM 428 SB* 12 51 25.12 +26 47 08.7           ~ 2 0
57 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1099 0
58 * 31 Com Ro* 12 51 41.9201696640 +27 32 26.565016812 5.81 5.61 4.94 4.39 4.04 G0IIIp 417 1
59 HD 111878 * 12 52 11.6160381936 +25 22 24.579304968   9.35 8.83 8.6   F8V 48 0
60 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4502 2
61 HD 113037 * 13 00 35.1763697736 +23 39 06.310536840   8.68 8.23     F5V 44 0
62 HD 114400 * 13 09 55.2637741464 +33 43 18.706075572   10.27 9.54     G0 20 0
63 TYC 2534-1715-1 * 13 11 28.0555406616 +33 46 50.761041816   11.29 10.54     ~ 3 0
64 BD+21 2514 * 13 18 47.0169764088 +20 15 04.369660848   10.86 10.08 10.006   G5 8 0
65 BD+38 2436 * 13 21 11.1902844504 +37 48 48.764162592   9.60 9.10     M2 12 0
66 BD+16 2505 * 13 24 38.0189111376 +16 02 19.254096996   10.25 9.64     G0 4 0
67 BD+25 2631 * 13 24 41.3796058416 +24 45 40.244207328   11.3 10.49     ~ 6 0

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2022.05.26-20:18:32

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