2008A&A...489..677P


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.27CET06:21:01

2008A&A...489..677P - Astronomy and Astrophysics, volume 489, 677-684 (2008/10-2)

Solar twins in M67.

PASQUINI L., BIAZZO K., BONIFACIO P., RANDICH S. and BEDIN L.R.

Abstract (from CDS):

The discovery of true solar analogs is fundamental to a better understanding of the Sun and of the solar system. Despite a number of efforts, this search has brought only limited results for field stars. The open cluster M67 offers a unique opportunity to search for solar analogs, because its chemical composition and age are very similar to those of the Sun. We analyse FLAMES spectra of a large number of M67 main sequence stars to identify solar analogs in this cluster. We first determined cluster members that are not likely binaries, by combining proper motions and radial velocity measurements. We concentrate our analysis on determining stellar effective temperature, using analyses of line-depth ratios and Hα wing and making a direct comparison to the solar spectrum obtained with the same instrument. We also computed the lithium abundance for all the stars. Ten stars have the temperature derived both by line-depth ratios and by the Hα wings within 100K from the Sun. From these stars we derive, assuming a cluster reddening E(B-V)=0.041, the solar color (B-V)=0.649±0.016 and a cluster distance modulus of 9.63. Five stars are most similar (within 60K) to the Sun and candidates to be true solar twins. These stars also have a low Li content, comparable to the photospheric abundance of the Sun, likely indicating a similar mixing evolution. We find several candidates for the best solar analogs ever. These stars are amenable to further spectroscopic investigations and planet searches. The solar colors are determined with fairly high accuracy with an independent method, as is the cluster distance modulus.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - Galaxy: open clusters and associations: individual: M67 - stars: late-type

Simbad objects: 96

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Number of rows : 96

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2740 0
2 Cl* NGC 2682 ES I-46 * 08 50 53.3447325187 +11 43 40.065214014 15.318 15.06 14.448   13.569 G0V 43 0
3 NGC 2682 27 * 08 50 53.4433969827 +11 44 34.676444017 14.439 14.3 13.606   12.865 G4V 20 0
4 Cl* NGC 2682 SAND 779 * 08 50 56.6632779749 +11 49 54.677226239 15.603 15.32 14.657   13.899 G3V 24 0
5 Cl* NGC 2682 SAND 820 * 08 50 57.0657131002 +11 56 50.737046981 16.003 15.73 14.996   14.155 G6V 15 0
6 Cl* NGC 2682 SAND 822 * 08 50 58.3455162422 +11 58 14.841149293 15.286 15.17 14.502   13.753 ~ 13 0
7 Cl* NGC 2682 SAND 829 * 08 50 58.4936371274 +11 59 39.505095064 14.958 14.84 14.247   13.483 G0V 22 0
8 NGC 2682 43 SB* 08 50 59.2317092764 +11 46 13.001543891 14.241 14.12 13.443   12.748 G2V 26 0
9 Cl* NGC 2682 SAND 816 SB* 08 50 59.2371180411 +11 56 36.866306643 13.845 13.80 13.213   12.545 ~ 19 0
10 Cl* NGC 2682 SAND 785 * 08 50 59.8074231216 +11 51 12.653373361 15.829 15.53 14.823 14.728 14.047 G4V 26 0
11 Cl* NGC 2682 YBP 1514 * 08 51 00.7627251015 +11 53 11.491460947 15.766 15.50 14.798   14.008 G5V 35 1
12 Cl* NGC 2682 YBP 1194 * 08 51 00.8053336097 +11 48 52.796026050 15.546 15.28 14.676   13.876 G5V 54 1
13 Cl* NGC 2682 ES I-26 * 08 51 02.0496438566 +11 45 19.118870324 16.060 15.73 14.982   14.162 G7V 19 0
14 Cl* NGC 2682 SAND 795 * 08 51 02.9929777932 +11 52 25.721491701 16.080 15.72 14.997   14.186 G5V 16 0
15 Cl* NGC 2682 SAND 757 EB* 08 51 04.8271793929 +11 45 56.881879807 14.331 14.216 13.541   12.841 ~ 38 0
16 NGC 2682 64 SB* 08 51 05.7565198289 +11 43 46.965702110 14.970 14.75 14.053   13.254 ~ 47 0
17 Cl* NGC 2682 SAND 2224 * 08 51 07.5170384238 +11 52 56.142363001 14.590 14.49 13.795   13.214 G1V 18 0
18 Cl* NGC 2682 SAND 1106 * 08 51 07.9548217536 +11 58 53.369016135 15.638 15.42 14.888   13.971 G4V 24 0
19 Cl* NGC 2682 SAND 1102 SB* 08 51 08.8554955581 +11 57 53.694085302 14.917 14.87 14.311   13.557 ~ 9 0
20 NGC 2682 76 SB* 08 51 08.9033284986 +11 48 37.782647390 14.988 14.71 13.999 13.572 13.221 G6V 12 0
21 Cl* NGC 2682 SAND 1095 * 08 51 09.1436188376 +11 57 00.365236469 15.363 15.21 14.625   13.813 G3V 25 0
22 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 38 0
23 Cl* NGC 2682 SAND 951 SB* 08 51 10.7813225228 +11 39 50.905280571 15.548 15.42 14.672   13.809 G3V 17 0
24 Cl* NGC 2682 JS a * 08 51 12.0250220678 +11 48 26.739762411   15.6 14.867   14.107 G4V 21 0
25 Cl* NGC 2682 SAND 1089 * 08 51 12.2908162178 +11 54 23.009443234 15.012 14.79 14.199   13.459 F9V 25 0
26 Cl* NGC 2682 SAND 1096 * 08 51 12.9844912887 +11 57 00.925938492 15.235 15.10 14.477   13.709 G2V 23 0
27 NGC 2682 488 * 08 51 14.3389375549 +11 41 09.223775876   15.14 14.530   13.731 G2V 26 0
28 NGC 2682 93 * 08 51 15.0498366526 +11 49 21.136610495 14.881 14.77 14.186   13.470 G2V 46 0
29 NGC 2682 110 SB* 08 51 17.5965780342 +11 39 36.061798979 14.185 14.13 13.590   12.841 G1V 15 0
30 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2085 0
31 NGC 2682 112 * 08 51 18.1012945122 +11 42 54.765300284 13.929 13.86 13.282   12.594 G0V 24 0
32 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 28 0
33 Cl* NGC 2682 SAND 956 * 08 51 18.6801285823 +11 40 36.789549682 14.625 14.61 14.062   13.331 F9V 8 0
34 Cl* NGC 2682 SAND 1093 * 08 51 18.7227202459 +11 55 49.732910251 14.906 14.73 14.134   13.449 G0V 22 0
35 NGC 2682 122 * 08 51 19.0456413616 +11 40 15.742292143 14.333 14.304 13.723   13.009 F9V 26 0
36 Cl* NGC 2682 SAND 950 Ro* 08 51 20.7913126471 +11 39 40.144815456 14.277 14.23 13.675 13.574 12.955 G1V 20 0
37 NGC 2682 132 * 08 51 20.8049357633 +11 45 02.511069423 13.812 13.71 13.110   12.38 G: 47 0
38 Cl* NGC 2682 ES I-54 * 08 51 21.7685361209 +11 44 05.090717500 14.976 14.89 14.186   13.421 ~ 35 0
39 Cl* NGC 2682 ES I-57 * 08 51 21.8387628042 +11 43 17.763132707 15.297 15.19 14.518 14.379 13.751 G4V 24 0
40 NGC 2682 142 * 08 51 23.1446712725 +11 54 05.026718692   14.8 14.230   13.469 G1V 27 0
41 Cl* NGC 2682 SAND 945 Ro* 08 51 23.8697478362 +11 38 52.155698546 15.302 15.17 14.554   13.713 G2V 29 0
42 Cl* NGC 2682 ES I-245 mul 08 51 24.102720 +11 47 10.00428 14.294 12.93 12.22 13.00 12.781 ~ 12 0
43 NGC 2682 149a * 08 51 24.2996788183 +11 47 28.409410357 15.918 15.69 14.928 14.542 14.164 G5V 26 0
44 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 19 0
45 Cl* NGC 2682 ES I-51 SB* 08 51 24.9898349488 +11 45 42.995622087 14.793 14.73 14.122   13.449 G2V 22 0
46 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 22 0
47 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 28 0
48 Cl* NGC 2682 SAND 944 Ro* 08 51 26.4814584815 +11 38 36.892242642 14.249 14.21 13.710 13.573 12.939 F9V 20 0
49 Cl* NGC 2682 ES III-36 * 08 51 27.4940608161 +11 53 02.482192371   14.80 14.243   13.474 F9V 21 0
50 NGC 2682 159 * 08 51 27.8885891317 +11 55 40.949719456 14.598 13.94 13.320   12.625 G1IV 36 0
51 Cl* NGC 2682 ES III-9 * 08 51 27.9474785266 +11 50 11.919029103 15.180 15.08 14.491   13.669 G4V 36 0
52 Cl* NGC 2682 ES II-1 * 08 51 28.6970276626 +11 48 02.199371192 14.501 14.45 13.821   13.040 G1V 26 0
53 Cl* NGC 2682 ES III-13 * 08 51 29.9638668720 +11 51 09.062503600 14.821 14.72 14.191 13.773 13.398 G2V 35 0
54 NGC 2682 171 * 08 51 30.1308714884 +11 43 49.891095543 13.787 13.75 13.136   12.436 F9V 28 0
55 Cl* NGC 2682 SAND 1264b * 08 51 30.5684947619 +11 48 54.812087627 13.984 13.92 13.349   12.618 ~ 20 0
56 NGC 2682 178 * 08 51 31.9171561313 +11 51 16.664399650 14.694 14.63 14.030 13.704 13.304 G0V 30 0
57 NGC 2682 179 SB* 08 51 32.0621052937 +11 55 08.639545072 14.424 14.33 13.728   12.951 G0V 25 0
58 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 20 0
59 Cl* NGC 2682 ES II-4 * 08 51 32.5745658330 +11 48 24.134371054 14.861 14.81 14.191   13.482 G0V 26 0
60 Cl* NGC 2682 SAND 1331 SB* 08 51 33.2482835958 +11 59 41.209527337 14.569 14.52 13.880   13.085 ~ 12 0
61 NGC 2682 187 SB* 08 51 33.6529252385 +11 51 45.020883557 13.865 13.82 13.201   12.501 G0V 20 0
62 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 25 0
63 NGC 2682 191 V* 08 51 34.4472056473 +11 37 57.437001165 13.743 13.777 13.207   12.425 F7V 26 0
64 Cl* NGC 2682 ES II-7 * 08 51 36.0753568316 +11 47 47.049856350 15.268 15.14 14.486   13.745 G1V 38 0
65 Cl* NGC 2682 SAND 1201 SB* 08 51 36.1560806440 +11 38 56.327229634 14.534 14.49 13.959   13.160 G0V 17 0
66 NGC 2682 201 SB* 08 51 37.2507318106 +11 46 55.742655598 14.727 14.66 14.073   13.283 G1V 27 0
67 Cl* NGC 2682 SAND 1320 * 08 51 37.5785285555 +11 56 44.587067100 15.267 15.06 14.482   13.684 ~ 20 0
68 NGC 2682 208 * 08 51 38.7388255135 +11 42 37.404741137 14.767 14.75 14.201 13.898 13.405 F8V 20 0
69 NGC 2682 209 * 08 51 39.0508901187 +11 47 55.414119410 14.461 14.33 13.783   12.992 ~ 44 0
70 Cl* NGC 2682 SAND 1335 * 08 51 39.4114594533 +12 00 57.181024816   15.24 14.680   13.832 ~ 18 0
71 NGC 2682 211 SB* 08 51 40.0773167431 +11 52 43.381263498 14.396 14.35 13.879   13.125 ~ 16 0
72 Cl* NGC 2682 ES II-14 * 08 51 41.4951945620 +11 47 36.174961813 14.804 14.71 14.188   13.382 G2V 32 0
73 Cl* NGC 2682 SAND 1330 * 08 51 42.7945720938 +11 59 31.043302152 14.748 14.63 14.137   13.327 F9V 20 0
74 Cl* NGC 2682 SAND 1333 SB* 08 51 43.6731110436 +12 00 55.081487575   14.29 13.679   12.841 ~ 8 0
75 Cl* NGC 2682 SAND 1202 V* 08 51 44.9279326781 +11 38 58.975554813 14.104 14.07 13.630 13.460 12.807 F9V 21 0
76 Cl* NGC 2682 SAND 1334 * 08 51 46.3284420960 +12 00 55.498396566   15.62 15.016   14.109 ~ 8 0
77 Cl* NGC 2682 SAND 1222 * 08 51 47.3980158224 +11 44 42.378978333 15.489 15.36 14.851   13.923 G3V 9 0
78 NGC 2682 239 * 08 51 48.4671498678 +11 42 22.911349629 14.700 14.65 14.089   13.309 G1V 13 0
79 Cl* NGC 2682 SAND 1258 * 08 51 48.9449390408 +11 48 02.212283305   15.15 14.614   13.760 G3V 18 0
80 Cl* NGC 2682 SAND 1224a SB* 08 51 50.2188627060 +11 44 57.086553377 14.215 14.12 12.895   12.771 ~ 14 0
81 NGC 2682 254 SB* 08 51 53.0928710764 +11 40 53.685913922 13.997 13.97 13.396   12.608 G0V 16 0
82 Cl* NGC 2682 SAND 1423 * 08 51 55.1534692976 +11 39 40.206152065 15.112 14.98 14.490   13.614 ~ 17 0
83 NGC 2682 259 SB* 08 51 55.5862539274 +11 48 38.219768488 14.749 14.6 14.016   13.149 ~ 18 0
84 Cl* NGC 2682 SAND 1449 * 08 51 56.5852008719 +11 47 24.997668539 15.149 15.00 14.381   13.649 G3V 23 0
85 Cl* NGC 2682 SAND 1462 SB* 08 51 58.7729633011 +11 50 02.549500093 15.135 14.99 14.318   13.544 ~ 26 0
86 Cl* NGC 2682 SAND 1483 * 08 52 00.4151128580 +11 56 07.053264859 15.156 14.99 14.461   13.617 ~ 19 0
87 Cl* NGC 2682 SAND 1481 * 08 52 02.4764275233 +11 55 34.226848448   15.5 14.967   13.981 ~ 10 0
88 Cl* NGC 2682 SAND 1486 * 08 52 03.3045303865 +11 58 04.640262093   14.57 14.097   13.286 ~ 13 0
89 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
90 Cl* NGC 2682 SAND 1442 SB* 08 52 05.1070154245 +11 46 21.439044109   15.54 14.877   13.923 ~ 10 0
91 Cl* NGC 2682 SAND 1431 SB* 08 52 05.8065632532 +11 42 24.701086625 14.248 14.347 13.822   12.932 ~ 12 0
92 Cl* NGC 2682 YBP 1101 * 08 52 08.4492571973 +11 48 10.516410113 15.657 15.38 14.68   13.903 ~ 12 0
93 HD 98618 PM* 11 21 29.0694769107 +58 29 03.704275968   8.303 7.651     G5V 67 0
94 HD 101364 PM* 11 40 28.4842891594 +69 00 30.600485781   9.32 8.67     G5 66 0
95 HD 143436 PM* 16 00 18.8372576001 +00 08 13.230554014       7.6   G3V 35 0
96 * 18 Sco PM* 16 15 37.2703721200 -08 22 09.981989277   6.15 5.50     G2Va 500 0

    Equat.    Gal    SGal    Ecl

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2021.02.27-06:21:01

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