Abstract
The non-LTE potassium abundances in the atmospheres of 33 Galactic-disk stars are derived and the parameters of the atmospheres of 23 of the stars are determined. Neglecting departures from LTE results in a systematic overestimation of the potassium abundances and an increase in their dispersion, even for differential analyses relative to the Sun. The non-LTE corrections are significant ((−0.2)–(−0.6) dex) and depend on the surface gravities and effective temperatures of the stars. The mean potassium abundance for a sample of ten stars with [Fe/H]∼0.0 is in agreement with the solar and meteoritic abundances (log ɛ ⊙(K)=5.12). As the stellar metallicity increases from [Fe/H]=(−1.0) to (0.2) dex, the [K/Fe] ratio decreases systematically from 0.3 dex to −0.1 dex. The derived dependence [K/Fe]-[Fe/H] is in agreement with the results of published model calculations of the chemical evolution of the Galaxy. This indicates the dominance of explosive oxygen burning in massive type II supernovae during the synthesis of potassium in the Galactic disk.
Similar content being viewed by others
References
R. G. Gratton and C. Sneden, Astron. Astrophys. 178, 179 (1987).
R. G. Gratton and C. Sneden, Astron. Astrophys., Suppl. Ser. 68, 193 (1987).
Y. Q. Chen, P. E. Nissen, G. Zhao, et al., Astron Astrophys., Suppl. Ser. 141, 491 (2000).
J. Tomkin, B. Edvardsson, D. L. Lambert, and B. Gustafsson, Astron. Astrophys. 327, 587 (1997).
P. X. Timmes, S. E. Wooskey, and T. A. Weaver Astrophys. J., Suppl. Ser. 98, 617 (1995).
A. Alibes, J. Labay, and R. Canal, Astron. Astrophys. 370, 1103 (2001).
A. Goswami and N. Prantzos, Astron. Astrophys. 359, 191 (2000).
M. Samland, Astrophys. J. 496, 155 (1998).
J. H. Bruls, R. J. Rutten, and N. Shchukina, Astron Astrophys. 265, 237 (1992).
Y. Takeda, K. Kato, and Y. Watanabe, Publ. Astron. Soc. Jpn. 48, 511 (1996).
D. V. Ivanova and V. V. Shimansky, Astron. Zh. 77, 432 (2000) [Astron. Rep. 44, 376 (2000)].
Y. Takeda, G. Zhao, Y.-Q. Chen, et al., Publ. Astron Soc. Jpn. 54, 275 (2002).
I. F. Bikmaev, A. I. Galeev, G. A. Galazutdinov, and F. A. Musaev, Astron. Zh. (in press).
F. A. Musaev, G. A. Galazutdinov, A. V. Sergeev, et al., Kinemat. Fiz. Neb. Tel 13, 282 (1999).
F. A. Musaev, Pis'ma Astron. Zh. 22, 795 (1996) [Astron. Lett. 22, 715 (1996)].
A. Galeev, I. Bikmaev, F. Musaev, and G. Galazutdinov, ASTROECO-2002 Abstract Book (ASTROECO-2002, Terskol, 2002), p. 39.
G. A. Galazutdinov, Preprint No. 92, 1 (Spec. Astrophys. Obs., Nizhnii Arkhyz, 1992).
A. Alonso, S. Arribas, and C. Martínez-Roger, Astron. Astrophys., Suppl. Ser. 117, 227 (1996).
J. Bernkopf, A. Fidler, and K. Fuhrmann, Astrophysical Ages and Time Scales, ASP Conf. Ser. 245 (Astron. Soc. Pacif., San Francisco, 2001), p. 207.
N. N. Shimanskaya and L. I. Mashonkina, Astron. Zh. 78, 122 (2001) [Astron. Rep. 45, 100 (2001)].
K. Fuhrmann, Astron. Astrophys. 338, 161 (1998).
A. Alonso, S. Arribas, and C. Martínez-Roger, Astron. Astrophys. 313, 873 (1996).
R. L. Kurucz, SAO CD-ROMs (MA0 2138, Cambridge, USA, 1994).
Catalog of WBVR Magnitudes of Brightest Stars in the Northern Sky [in Russian], Tr. Gos. Astronom. Inst. Shternberga, LXIII, 1991.
G. P. Di Benedetto, Astron. Astrophys. 339, 858 (1998).
The Hipparcos and Tycho Catalogues (ESA SP-1200, 1997), p. 1.
P. A. Bergbusch and D. A. van der Berg, Astrophys J., Suppl. Ser. 81, 163 (1992).
L. Girardi, A. Bressan, G. Bertelli, and C. Chiosi, Astron. Astrophys., Suppl. Ser. 141, 371 (2000).
F. Kupka, N. Piskunov, T. A. Ryabchikova, et al., Astron. Astrophys., Suppl. Ser. 138, 119 (1999).
S. Kroll and M. Kock, Astron. Astrophys., Suppl. Ser. 67, 225 (1987).
J. Moity, Astron. Astrophys., Suppl. Ser. 52, 37 (1983).
R. Schnabel, M. Kock, and H. Holweger, Astron. Astrophys. 342, 610 (1999).
C. Hiese and M. Kock, Astron. Astrophys. 230, 244 (1990).
R. L. Kurucz, I. Furenlid, J. Brault, and L. Testerman, Solar Flux Atlas from 296 to 1300 nm (Nat. Solar Obs., Sunspot, New Mexico, 1984).
N. Grevesse, A. Noels, and A. J. Sauval, Cosmic Abundances, ASP Conf. Ser. 99 (Astron. Soc. Pacif., San Francisco, 1996), p. 117.
N. A. Sakhibullin, Tr. Kazan. Astron. Obs. 48, 9 (1983).
L. H. Auer and J. Heasley, Astrophys. J. 205, 165 (1976).
S. E. Nersisyan, A. V. Shavrina, and A. A. Yaremchuk, Astrofizika 30, 247 (1989).
V. F. Suleimanov, Pis'ma Astron. Zh. 22, 107 (1996) [Astron. Lett. 22, 92 (1996)].
N. A. Sakhibullin and V. V. Shimansky, Astron. Zh. 73, 73 (1996) [Astron. Rep. 40, 62 (1996)].
V. Hill, B. Plez, R. Cayrel, et al., Astron. Astrophys. 387, 560 (2002).
E. Depague, V. Hill, M. Spite, et al., Astron. Astrophys. 290, 187 (2002).
Author information
Authors and Affiliations
Additional information
__________
Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 80, No. 9, 2003, pp. 816–829.
Original Russian Text Copyright © 2003 by Shimansky, Bikmaev, Galeev, Shimanskaya, Ivanova, Sakhibullin, Musaev, Galazutdinov.
Rights and permissions
About this article
Cite this article
Shimansky, V.V., Bikmaev, I.F., Galeev, A.I. et al. Observational constraints on potassium synthesis during the formation of stars of the Galactic disk. Astron. Rep. 47, 750–762 (2003). https://doi.org/10.1134/1.1611216
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/1.1611216