A possible origin of the high metallicity in the nuclei of massive galaxies and quasars |
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| Authors: | A V Moiseev A V Tutukov D S Wiebe B M Shustov |
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| Institution: | (1) St. Petersburg State University, St. Petersburg, Russia;(2) Institute of Astronomy, Moscow, Russia |
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| Abstract: | According to current observations, the relative abundance of gas-phase metals in distant quasars with ages of only ～109 yr (z～5) can be appreciably higher than the solar abundance. We show that there are two main ways to explain the high metallicity of these galactic nuclei: a high gas density in the central regions, or an increase in the minimum masses of forming stars to several solar masses. The results of numerical modeling confirm this conclusion. |
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