CHEMICAL COMPOSITION OF THE ATMOSPHERES OF THREE GIANTS IN HYADES
DOI:
https://doi.org/10.18524/1810-4215.1993.6.104677Ключові слова:
Stars, late giants, chemical compositionАнотація
The abundances and physical conditions in the atmospheres of three Hyades giants have been investigated by using the high-dispersion (5.6 A/mm) spectra obtained at the 6-m telescope of the Special Astrophysical Observatory. The empirical analysis of the deviations from LTE for the Fe lines with the low and high excitation potentials showed the slight differences within the limits of the determination errors. The abundances of 22 chemical elements the atmospheres of the K-giants derived by the method of the model atmospheres differ from the solar one. Underabundance of O and overabundance of Na of about 0.5 dex and of elements after Y of about 0.2 dex are established.
Посилання
Bell R.A., Erikson R., Gustafsson B., Nordlund A.:1978, As. Ap. Suppl, 2, 229
Boyarchuk A.A., Boyarchuk M.E.: 1981, Izvestiya Krim. AO, 53, 66
Branch D., Lambert D.L, Tomkin J.:1980, Ap J (Letters), 241, L83
Burnashov V.J.: 1983, lzvestija Krim. AO, 52, 13
Gajour E.B., Naydenov l.D., Panchuk V.E.: 1986, lzvestija Spec. Astrophys.obs. 23, 105
Gingerich 0., Noyes R.W., Kalkofen W.:1971, Solar Phys. 18, 317
Griffin R.F, Gunn J.E.:1977, Astron J. 82, 176
Gurtovenko E.A., Kostyk R.I.: 1980.The establishment of main system of oscillators strengths and chemical abundance in the Solar photospheres, Preprint Inst Theor Phys. AS UkSSR, Kiev
Kholopov P.N: 1981, Stellar clusters, Moscow, Nauka, 480
Komarov N.S., Dragunova A.V., Karamysh V.P., Orlova L.F., Pozigun V.A.: 1979,The photometric and spectral catalogue of bright stars, Naukova Dumka, Kiev, 535pp.
Korotina L.V., Dragunova A.V., Komarov N.S.:1988.The catalogue of main characteristics of 980 late type stars, Preprint Ukr.Res.lnst.Sci.Tech.lnf.(UkrNllNTl) No 2037-88
Kostyk R.l.:1982,'lhe oscillators strengths of titanium, chromium, iron and nickel lines’. Preprint InstTheor.Phys. AS UkSSR, Kiev
Kurucz R.L, Peytremann O.P.: 1975, SAO SpecReport. No. 362. 730
Kurucz R. L.: 1970, ATLAS, SAO Spec. Report No. 309
Masevich A.H.,Tutukov A.V.: 1988, The evolution of stars: theory and observations (in Russian), Moscow. Nauka
Mishenina T.V.: 1985,The equivalent widths of lines in spectra of 10 giant stars. Preprint UkrNIINTl No 2705-85
Mishenina T.V: 1987, The empirical analysis of the deviation from LTE in the atmospheres of K-giants from Fel lines y Tau. Preprint UkrNIlNTl N 430-87
Mishenina T.V., Komarov N.S., Panchuk V.L.: 1987, Analysis of the atmospheres of K-giants., Preprint UkrNIlNTl No 1230-87
Mishenina T.V., Panchuk V.E, Komarov N.S.: 1986, lzvestija Spec. Astrophys. Obs., 22, 13
Moore C.E., Minnaert M.G., Houtgast J.: 1966, The Solar spectrum 935-8770 A. NBS Monogr. 61, US Govern Print Off.Washington,349
Motrich V.D.: 1990, The catalogue of main characteristics of late type stars Preprint UkrNIlNTl N 1926
Paczynski B: 1970, Acta Astron. 20, 47
Perekhod A.V.:1988. The value of oscillators strengths of chosen spectral lines of some chemical elements. (private communication)
Ridgway S.T., Joyce R.R., White N.M., Wing R.F.: 1980, ApJ. 25, 126
Tsymbal V.V.: 1980, Synthetic spectra of M-stars. Ph.D.Thesis, Odessa State University
##submission.downloads##
Опубліковано
Номер
Розділ
Ліцензія
Авторське право (c) 2017 Odessa Astronomical Publications
Ця робота ліцензується відповідно до Creative Commons Attribution-NonCommercial 4.0 International License.
Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року
