How Massive Are the Superfluid Cores in the Crab and Vela Pulsars and Why Their Glitch-Events Are Accompanied with under and Overshootings?

Abstract

The 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.

Foundation of the unicentric model of the observable universe - UNIMOUN

“…The state of matter inside massive neutron stars (NSs) cannot be probed under terrestrial conditions, though multi-messenger observations may be used to limit the range of possibilities. In particular, the ob-served glitch phenomena in pulsars, together with the recently discovered under and over-shootings found to associate the glitch events in the Vela pulsar, confirm the predicated exchange of mass and angular momentum in the geometrically thin boundary layer between the rigid-body rotating quantum core and the differentially rotating dissipative matter in the overlying shells [19,20,21,22]. Recalling that the density of degenerate matter inside the cores of massive pulsars is larger than the nuclear density ρ 0 , then the cooling down of pulsars on cosmic times should transfer their contents into entropy-free superfluids.…”

Hubble Tension versus the Cosmic Evolution of Hubble Parameter in the Unicentric Model of the Observable Universe

“…Indeed, the matter inside the cores of glitching pulsars, e.g. the Crab and Villa pulsars, are expected to obey these conditions nicely [19].…”

The Origin of Power and Acceleration of High-Redshift Galaxies in the Unicentric Model of the Universe

“…Based on various theoretical and observational studies of glitching pulsars, it was argued that incompressible and entropy-free SuSu-matter inside the cores of massive pulsars and neutron stars decouples from the embedding spacetime [19] [20] [22]. The consequence is that, in the absence of normal matter, both spacetimes inside and outside SuSu-objects become conformally flat.…”