How Massive Are the Superfluid Cores in the Crab and Vela Pulsars and Why Their Glitch-Events Are Accompanied with under and Overshootings?
Preprint Posting Date2020-02-16
Online Publication Date2020-03-13
Print Publication Date2020
Permanent link to this recordhttp://hdl.handle.net/10754/661767
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AbstractThe Crab and Vela are well-studied glitching pulsars and the data obtained so far should enable us to test the reliability of models of their internal structures. Very recently it was proposed that glitching pulsars are embedded in bimetric spacetime: their incompressible superfluid cores (SuSu-cores) are embedded in flat spacetime, whereas the ambient compressible and dissipative media are enclosed in Schwarzschild spacetime. In this letter we apply this model to the Crab and Vela pulsars and show that a newly born pulsar initially of 1.25M and an embryonic SuSu-core of 0.029M could evolve into a Crab-like pulsar after 1000 years and into a Vela-like pulsar 10,000 years later to finally fade away as an invisible dark energy object after roughly 10 Myr. Based thereon we infer that the Crab and the Vela pulsars should have SuSu-cores of 0.15M and 0.55M , respectively. Furthermore, the under- and overshootings phenomena observed to accompany the glitch events of the Vela pulsar are rather a common phenomenon of glitching pulsars that can be well-explained within the framework of bimetric spacetime.
CitationHujeirat, A. A., & Samtaney, R. (2020). How Massive Are the Superfluid Cores in the Crab and Vela Pulsars and Why Their Glitch-Events Are Accompanied with under and Overshootings? Journal of Modern Physics, 11(03), 395–406. doi:10.4236/jmp.2020.113025
SponsorsThe calculations have been carried out using the computer cluster of the IWR, University of Heidelberg. RS acknowledges the use of KAUST baseline research funds.
PublisherScientific Research Publishing, Inc.
JournalJournal of Modern Physics
Except where otherwise noted, this item's license is described as This is open access article licensed under the Creative Commons Attribution International License (CC BY 4.0).