2011A&A...526A..17C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:06:38

2011A&A...526A..17C - Astronomy and Astrophysics, volume 526A, 17-17 (2011/2-1)

Solar twins in M 67: evolutionary status and lithium abundance.

CASTRO M., DO NASCIMENTO J.D.Jr, BIAZZO K., MELENDEZ J. and DE MEDEIROS J.R.

Abstract (from CDS):

We determine the age and mass of the three best solar twin candidates in open cluster M67 through lithium evolutionary models. We computed a grid of evolutionary models with non-standard mixing at metallicity [Fe/H]=0.01 with the Toulouse-Geneva evolution code for a range of stellar masses. We estimated the mass and age of 10 solar analogs belonging to the open cluster M67. We made a detailed study of the three solar twins of the sample, YPB637, YPB1194, and YPB1787. We obtained a very accurate estimation of the mass of our solar analogs in M67 by interpolating in the grid of evolutionary models. The three solar twins allowed us to estimate the age of the open cluster, which is 3.87+0.55–0.66Gyr, which is better constrained than former estimates. Our results show that the 3 solar twin candidates have one solar mass within the errors and that M67 has a solar age within the errors, validating its use as a solar proxy. M67 is an important cluster when searching for solar twins.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: abundances - stars: evolution - stars: interiors - stars: solar-type

Simbad objects: 13

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Number of rows : 13

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 779 * 08 50 56.6632779749 +11 49 54.677226239 15.603 15.32 14.657   13.899 G3V 21 0
2 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
3 Cl* NGC 2682 YBP 1194 * 08 51 00.8053336097 +11 48 52.796026050 15.546 15.28 14.676   13.876 G5V 49 1
4 Cl* NGC 2682 SAND 1095 * 08 51 09.1436188376 +11 57 00.365236469 15.363 15.21 14.625   13.813 G3V 22 0
5 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2032 0
6 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 21 0
7 Cl* NGC 2682 SAND 945 Ro* 08 51 23.8697478362 +11 38 52.155698546 15.302 15.17 14.554   13.713 G2V 25 0
8 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 25 0
9 Cl* NGC 2682 SAND 1335 * 08 51 39.4114594533 +12 00 57.181024816   15.24 14.680   13.832 ~ 15 0
10 Cl* NGC 2682 SAND 1462 SB* 08 51 58.7729633011 +11 50 02.549500093 15.135 14.99 14.318   13.544 ~ 22 0
11 Cl* NGC 2682 YBP 1101 * 08 52 08.4492571973 +11 48 10.516410113 15.657 15.38 14.68   13.903 ~ 9 0
12 HD 101364 PM* 11 40 28.4842891594 +69 00 30.600485781   9.32 8.67     G5 64 0
13 HD 133600 PM* 15 05 13.2481747000 +06 17 23.691579336       7.8   G0 40 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-15:06:38

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