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Transition to light-like trajectories in thin shell dynamics

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1-s2.0-S0550321318302529-main.pdf (333.21 KB)

Date

2018-11

Authors

Mann, Robert B.
Nagle, Ian
Terno, Daniel R.

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

It was recently shown that a massive thin shell that is sandwiched between a flat interior and an exterior geometry given by the outgoing Vaidya metric becomes null in a finite proper time. We investigate this transition for a general spherically-symmetric metric outside the shell and find that it occurs generically. Once the shell is null its persistence on a null trajectory can be ensured by several mechanisms that we describe. Using the outgoing Vaidya metric as an example we show that if a dust shell acquires surface pressure on its transition to a null trajectory it can evade the Schwarzschild radius through its collapse. Alternatively, the pressureless collapse may continue if the exterior geometry acquires a more general form.

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Keywords

thin shell

LC Keywords

Citation

URI

https://doi.org/10.1016/j.nuclphysb.2018.09.005
 http://hdl.handle.net/10012/14297

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Waterloo Research
Physics and Astronomy