Greifswald 2024 – scientific programme

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DD: Fachverband Didaktik der Physik

DD 38: Astronomie – Poster

DD 38.9: Poster

Wednesday, February 28, 2024, 14:00–15:00, ELP 6: Foyer

Analysis of Gravitational Instabilities in Stars Using a Model Sequence — •Lina Jarck¹ and Hans-Otto Carmesin^1,2,3 — ¹Athenaeum, Stade — ²Studienseminar Stade — ³Universität Bremen, Fachbereich 1

In a student research club, we investigate gravitational instabilities in stars. To do so, we develop a progressive sequence of models with increasing predictive power. Throughout our model sequence, we utilize the appropriate model for each specific inquiry. The models also provide opportunities for verification and comparison. First, we apply a model of Sun with variable density as a function of radius. As this function is widely known, we test our model. For further progression and validation of our method, we construct a model with variable density for White Dwarfs, where the Chandrasekhar limit confirms our results. Progressively, we develop a model with variable density for Neutron Stars and black holes. We represent the results within a specially created phase diagram. In this diagram, the states of stars are shown as a function of radius and mass. In the diagram, there are Neutron Stars, a transition-line to possible Quark-Gluon-Stars, and a transition-line to black holes.

Keywords: Star Models; Neutron Stars; Black Holes; Gravitational Instabilities; Astrophysics