Gravitational collapse and the vacuum energy

2nd International Symposium on the Modern Physics of Compact Stars and Relativistic Gravity

物理学;天文学

Campos, M.^1

Physics Department, Roraima Federal University, Brazil^1

关键词: Accelerated expansion of the universe;    Dark energy;    Dark matter;    Gravitational collapse;    Vacuum energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/496/1/012021/pdf
DOI  :  10.1088/1742-6596/496/1/012021

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

To explain the accelerated expansion of the universe, models with interacting dark components (dark energy and dark matter) have been considered recently in the literature. Generally, the dark energy component is physically interpreted as the vacuum energy of the all fields that fill the universe. As the other side of the same coin, the influence of the vacuum energy on the gravitational collapse is of great interest. We study such collapse adopting different parameterizations for the evolution of the vacuum energy. We discuss the homogeneous collapsing star fluid, that interacts with a vacuum energy component, using the stiff matter case as example. We conclude this work with a discussion of the Cahill-McVittie mass for the collapsed object.