Supermassive neutron stars rule out twin stars
| Autor: | Jürgen Schaffner-Bielich, Jan-Erik Christian |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Phase transition Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory FOS: Physical sciences Astrophysics Strange matter Neutron star Discontinuity (linguistics) Mean field theory Binary star Energy density Connection (algebraic framework) Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | Physical Review D. 103 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.103.063042 |
| Popis: | We investigate the implications of a hypothetical $2.5\,\mathrm{M_\odot}$ neutron star in regard to the possibility of a strong phase transition to quark matter. We use equations of state (EoS) of varying stiffness provided by a parameterizable relativistic mean filed model transitioning in a first order phase transition to quark matter with a constant speed of sound. We find a strong connection between the discontinuity in energy density and the maximal mass generated by the EoS. We demonstrate, that high maximal masses cannot be realized for large discontinuities in energy density, which are necessary for visible twin stars, especially for soft EoSs. As a result twin stars and maximal masses of $M_{max}\gtrsim2.2\,M_\odot$ are mutually exclusive. Comment: 6 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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