| Full text | |
| Author(s): |
Goncalves, Victor P.
;
Jimenez, Jose C.
;
Lazzari, Lucas
Total Authors: 3
|
| Document type: | Journal article |
| Source: | EUROPEAN PHYSICAL JOURNAL A; v. 59, n. 11, p. 9-pg., 2023-11-02. |
| Abstract | |
The dynamical stability of strange-dwarf hybrid stars and strange planets, constituted by strange-quark-matter cores and dilute-nuclear-matter crusts, is revisited by analyzing the fundamental mode eigenfrequencies of the radial oscillation equations with boundary conditions for slow (rapid) conversions originating at the density-discontinuous interface characterizing extremely large (small) microscopic timescales compared to the oscillation periods. For the hadronic crust we used an analytic fit of the BPS results matched to the massless MIT bag model. For the rapid case, our calculations indicate that the zero mode is the so-called reaction mode whose frequency is a complex number, thus ruling out the existence of strange dwarfs (planets) in nature. On the other hand, slow conversions still provide a sizeable stability window which, interestingly, also reproduces the Glendenning-Kettner-Weber results. The robustness of our findings is demonstrated for different transition densities and using an equation of state from perturbative QCD for the ultra-dense core. (AU) | |
| FAPESP's process: | 18/24720-6 - Exploring the QCD phase diagram |
| Grantee: | Frédérique Marie Brigitte Sylvie Grassi |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 20/07791-7 - Hydrodynamics for the Beam Energy Scan: 3+1 viscous hydrodynamics with baryon diffusion |
| Grantee: | José Carlos Jiménez Apaza |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |