Web14 de dic. de 2024 · The large surface redshifts employed in gravastar models have two immediate implications: (i) the internal energy generated per unit rest mass accreted is very nearly superscript 𝑐 2, i.e., the usual accretion efficiency factor 𝜂 1 (and will be neglected henceforth), and (ii) the radiation emitted from the surface of the object should be almost … Web6 de oct. de 2009 · Assuming that the gravastar is the result of a BEC-like phase transition induced by strong gravity , the gravastar which starts at zero temperature and rapidly accretes a mass ΔmM Sun will be heated to a temperature as observed at infinity of T h ≈ 3.1 × 10 6 m −2/3 ξ 1/3 (Δm/m) 1/3 K, where m is the mass of the gravastar in solar …
Where are all the gravastars? Limits upon the gravastar model …
Webwhere M˙ is the mass accretion rate and L is the total luminosity. Thus, from equation (1), we estimate that a gravastar which starts at zero temperature and rapidly accretes a mass ∆mM⊙ will be heated to a temperature as observed at infinity of T h ≃ M⊙c2 Um2 1/3 ξ1/3 ∆m m 1/3 ≃ 3.1× 106m−2/3ξ1/3 ∆m m 1/3 K, (3) where m is ... Web11 de oct. de 2024 · Also, we propose gravastars as the solution of the "pair-instability" effect and a possible explanation for the observed masses of the compact objects, before the collapse, from the gravitational signal GW190521, since in the formation of a gravastar there aren't mass restrictions. Submission history From: Ioannis Antoniou [ view email ] trnf6
[1909.01139] Charged Gravastars in Rastall-Rainbow Gravity
Web26 de ago. de 2024 · The mass of the remnant after the collapse is 142 + 28 − 16 M ⨀ which is in the limit of the mass gap. The theory of Gravastars hasn’t mass restrictions, … Web2 de sept. de 1997 · A new final endpoint of complete gravitational collapse is proposed. By extending the concept of Bose–Einstein condensation to gravitational systems, a static, spherically symmetric solution to Einstein’s equations is obtained, characterized by an interior de Sitter region of p=−ρ gravitational vacuum … WebA gravastar is an object hypothesized in astrophysics by Pawel O. Mazur and Emil Mottola as an alternative to the black hole theory. It has usual black hole metric outside of the … trnfp