THE ABUNDANCES IN THE STELLAR ATMOSPHERES IN THE M13 GLOBULAR CLUSTER

Автор(и)

  • T. V. Mishenina Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014 Ukraine, Україна
  • S. V. Kutsenko Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014 Ukraine, Україна

DOI:

https://doi.org/10.18524/1810-4215.1994.7.105760

Ключові слова:

globular cluster, stars, chemical composition.

Анотація

The chemical composition of 5 stars' atmospheres in globular cluster M13 and 2 halo stars taken from literature have been computed. A slight excess of O and deficit of Mg have been defined for globular cluster stars. The elements Si, Ca, Ti are overabundant (≈ 0.3 dex), Ni is slightly deficient (-0.08), Mg - more deficient (- 0.3), Y - slightly overabundant. Comparison with halo stars showed the difference in composition of Na, Mg and elements of r-, s- processes.

Посилання

Bell R.A., Eriksson K., Gustafsson B., Nordlund B.: 1976, As.Ap., 23, 37.

Cohen J.: 1978, Ap.J., 223, 487.

Francois P., Spite M., Spite P.; 1988, As.Ap., 191, 267.

Gratton R.G., Sneden C.: 1987, As.Ap., 178,179.

Gurtovenko E.A., Kostyk R.I.: 1989, Fraunhofer spectrum and system of solar oscillators strengths (in Russian), Naukova dumka, Kiev, p.200.

Lehnert M.D., Bell R.A., Cohen J.G.: 1990, Ap.J., 367,514.

Luck R., Bond H.: 1985, Ap.J.Suppl, 59, 249.

Suntzeff N.B.: 1981, Ap.J.Suppl, 47, 1.

Wallerstein G., Leep E.: 1987, A. J., 93, 1137

##submission.downloads##

Опубліковано

2017-07-01

Номер

Розділ

Статті