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The Story of Collapsing StarsBlack Holes, Naked Singularities, and the Cosmic Play of Quantum Gravity$
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Pankaj S. Joshi

Print publication date: 2015

Print ISBN-13: 9780199686766

Published to Oxford Scholarship Online: January 2015

DOI: 10.1093/acprof:oso/9780199686766.001.0001

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The Frontiers

The Frontiers

(p.197) 10 The Frontiers
The Story of Collapsing Stars

Pankaj S. Joshi

Oxford University Press

In this final chapter, several recent and frontier developments, together with possible observable consequences of naked singularities which may distinguish them from their black hole counterparts through astrophysical signatures are considered. This chapter discusses the current major black hole paradoxes, such as the information paradox and the teleology or causality issues created by the black hole event horizons. Their possible resolution and a way out is proposed using current gravitational collapse results. The descent in a black hole versus that for a naked singularity by an observer are discussed and contrasted. The chapter also points out what are the current available possibilities to test the cosmic censorship conjecture through astronomical observations. In particular, super-rotating models and objects could play an important part here. The accretion disks around black holes and naked singularities are discussed which imply important physical differences in the characteristic emission spectra for these objects. Very high energy particle collisions and gravitational lensing near black holes and naked singularities are then discussed.

Keywords:   naked singularities: observable detection, astrophysical signatures black hole paradoxes, High Energy Particle Collisions, Gravitational Lensing Near Naked Singularity

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