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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:24 |
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Conference: Bucharest University Faculty of Physics 2002 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
Numerical simulations of stellar composition and motions
Authors:
Oana Tascau (1), Cristian Ivan (2), Mircea V. Rusu(3)
Affiliation:
(1), (2) Student, Department of Physics, University of Bucharest
(3) Department of Physics, University of Bucharest
E-mail
Keywords:
Abstract:
In this paper we will present computer codes that computes stellar structures and motion based on equations and relations of stellar structure.
STATSTAR integrates from the surface of the star toward the centre using the stellar structure equations and the data inputted by the user (desired stellar mass (in solar units), the trial luminosity (in solar units) the trial effective temperature (in Kelvin) and the mass fractions of hydrogen and metals).
GALAXY is a program that calculates the gravitational effect of the close passage of two galactic nuclei on a disk of stars. The program considers two galactic nuclei of masses M1 and M2 and treats them as point masses. The target galaxy M1 is initially at rest. The use is asked to provide the initial position and velocity of the intruder galaxy M2, its mass and the number of stars around the target galaxy. After each time step, the results are displayed as two graph showing the positions of the nuclei and stars on the x-y and x-z planes.
ORBIT calculates the position of a planet during a period at different time steps using the input data (mass of parent star, semimajor axis of the planet and the eccentricity).
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