Centre for Modeling and Simulation
Savitribai Phule Pune University All Models Are False, Some Are Useful

Technical Report CMS-TR-20110705


Title Depletion of energy from naked singular regions during gravitational collapse
Author/s S. Jhingan
Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110025, India


I. H. Dwivedi
21, Ballabhji Vihar, Dayalbagh, Agra, India


Sukratu Barve
Centre for Modeling and Simulation, Savitribai Phule Pune University, Pune 411 007 India
Abstract A distinguishable and observable physical property of naked singular regions of the spacetime formed during a gravitational collapse has important implications for both experimental and theoretical relativity. We examine here whether energy can escape physically from naked singular regions to reach either a local or a distant observer within the framework of general relativity. We find that in the case of imploding null dust collapse outgoing singular null geodesics including the Cauchy horizon can be immersed between two Vaidya spacetimes as null boundary layers with nonvanishing positive energy density. Thus energy can be transported from the naked singularity to either a local or a distant observer. An example illustrating that similar considerations can be applied to dust models is given.
Keywords
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Citing This Document S. Jhingan, I. H. Dwivedi, and Sukratu Barve. , Depletion of energy from naked singular regions during gravitational collapse . Technical Report CMS-TR-20110705 of the Centre for Modeling and Simulation, Savitribai Phule Pune University, Pune 411007, India (2011); available at http://cms.unipune.ernet.in/reports/.
Notes, Published Reference, Etc. Published as Physical Review D 84, 024001 (2011)
Contact sanjay.jhingan AT gmail.com
dwivedi AT gmail.com

sukratu AT cms.unipune.ernet.in
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