Spherically symmetric scalar field collapse

Pramana

Narayan Banerjee3²  Koyel Ganguly1¹ 

[1] Relativity and Cosmology Research Centre, Department of Physics, Jadavpur University, Kolkata 700 032, India$$;IISER-Kolkata, Mohanpur Campus, P.O. BCKV Main Office, Nadia 741 252, India$$

关键词: Gravitational collapse;    scalar field;    dark energy;    apparent horizon.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

It is shown that a scalar field, minimally coupled to gravity, may have collapsing modes even when the energy condition is violated, that is, for (𝜌 + 3𝑝) < 0. This result may be useful in the investigation of the possible clustering of dark energy. All the examples dealt with have apparent horizons formed before the formation of singularity. The singularities formed are shell focussing in nature. The density of the scalar field distribution is seen to diverge at singularity. The Ricci scalar also diverges at the singularity. The interior spherically symmetric metric is matched with exterior Vaidya metric at the hypersurface and the appropriate junction conditions are obtained.

【 授权许可】

Unknown