Astronomical School’s Report, 2004, Volume 5, Issue 1-2, Pages 211–217

https://doi.org/10.18372/2411-6602.05.1211
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UDC 524

Numerical simulations of the chemical evolution of complex gravitating disk and dwarf galaxies system

Shumakova T.A., Berczik P.P.

Main Astronomical Observatory NAS of Ukraine

Abstract

In this work we have simulated the evolution of disk and dwarf galaxies gravitating system, using our viscosity algorithm. We investigated changes in disk galaxy chemical abundance due to minor merger of dwarf galaxy with lower abundance of heavy elements. We have found, that presence of a dwarf galaxy in the halo of disk galaxy and its minor merger give in result the formation of the compact area with the lowered abundance of heavy elements on the schedule of heavy elements radial distribution. This result says that it is the possibility to find the satellite in disk galaxy owing to its radial distribution. After the merger the galaxy disk structure and its chemical abundance change, the galaxy become sricher on the maintenance of heavy elements. We have compared the received results with the observational data for disk galaxy NGC 2903 and have found, that in NGC 2903 the manifestations of a dwarf galaxy minor merge rare observed.

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