Abstract
We have estimated the age of the open cluster NGC 2287 (M41) by taking into account the rotation of the member stars.
TheUBV photoelectric measurement values were taken from Eggen (1974). Besides the Main-Sequence stars this cluster has seven red giants, all of them above the turn-off point.
Having obtained the theoretical Hertzsprung-Russell diagram from observed colour-magnitude diagram, we have discussed two methods, given in the literature, to estimate the age of the cluster under consideration. The first method we have followed is to determine the turn-off point on the cluster Main-Sequence. The other is fitting the position of the red giants with the evolutionary tracks of rotating stars with different masses on the Hertzsprung-Russell diagram.
We have estimated the cluster age based on the turn-off point as 3.10×107 yr. From the fitting of the evolutionary tracks of rotating stars to the cluster Hertzsprung-Russell diagram, we infer that the age of the cluster is about 8.00×107 yr.
Similar content being viewed by others
References
Cox, A. N.: 1954,Astrophys. J. 119, 188.
Eggen, O. J.: 1974,Astrophys. J. 188, 59.
Eggen, O. J.: 1981,Astrophys. J. 247, 507.
Ezer, D. and Cameron, A. G. W.: 1967,Can. J. Phys. 45, 3429.
Ezer, D., Kirbiyik, H., and Özkara, N.: 1986,Astrophys. Space Sci. 126, 29.
Feinstein, A., Cabrera, A. L., and Claria, J. J.: 1978,Astron. Astrophys. Suppl.,34, 241.
Flower, P. J.: 1977,Astron. Astrophys. 54, 31.
Levato, H., and Garcia, B.: 1984,Astrophys. Letters 24, 161.
Meyer-Hofmeister, E.: 1972,Astron. Astrophys. 16, 282.
Pastoriza, M. G. and Röpke, U. O.: 1983,Astron. J. 88, 1769.
Sackmann, I. J. and Anand, S. P. S.: 1970,Astrophys. J. 162, 105.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kücük, I., Eryurt-Ezer, D. Age determination of the open cluster NGC 2287 (M41). Astrophys Space Sci 147, 137–143 (1988). https://doi.org/10.1007/BF00656613
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00656613