2 citations · 8 across the 18 of their papers we have counts for
18 papers
Rotating neutron stars in the first order post-Newtonian approximation
Athanasios Fotopoulos, Vasileios G. Karageorgopoulos, Vassilis S. Geroyannis
We study models of uniformly and differentially rotating neutron stars in the framework of post-Newtonian approximation in general relativity as established by Chandrasechar. In pa…
Polytropic Wind Solutions via the Complex Plane Strategy
Vasileios Karageorgopoulos, Konstantinos N. Gourgouliatos, Vassilis Geroyannis
Solar-type stars generate spherical winds, which are pressure driven flows, that start subsonic, reach the sound speed at the sonic point and transition to supersonic flows. The so…
A numerical method for computing optimum radii of host stars and orbits of planets, with application to Kepler-11, Kepler-90, Kepler-215, HD 10180, HD 34445, and TRAPPIST-1
Vassilis S. Geroyannis
In the so-called "global polytropic model", we assume planetary systems in hydrostatic equilibrium and solve the Lane--Emden equation in the complex plane. We thus find polytropic…
A parallel code for multiprecision computations of the Lane-Emden differential equation
Vassilis S. Geroyannis, Vasileios G. Karageorgopoulos
We compute multiprecision solutions of the Lane-Emden equation. This differential equation arises when introducing the well-known polytropic model into the equation of hydrostatic…
Gravitational quantization of exoplanet orbits in HD 10180, Kepler-32, Kepler-33, Kepler-102, and Kepler-186
Vassilis S. Geroyannis
The so-called "global polytropic model" is applied to the numerical study of the exoplanet systems HD 10180, Kepler-32, Kepler-33, Kepler-102, and Kepler-186. We compare computed d…
Gravitational quantization of exoplanet orbits in HD 40307, Ara, Kepler-26, Kepler-62, and Kepler-275: Comparing predicted orbits
Vassilis S. Geroyannis
According to the so-called "global polytropic model", hydrostatic equilibrium for a planetary system leads to the Lane-Emden differential equation. Solving this equation in the com…