Twin stars within the SU(3) chiral quark-meson model
| Autor: | Andreas Zacchi, Jürgen Schaffner-Bielich, Laura Tolos |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Quark
Particle physics Nuclear Theory Meson Astrophysics::High Energy Astrophysical Phenomena High Energy Physics::Lattice FOS: Physical sciences 01 natural sciences Nuclear Theory (nucl-th) High Energy Physics - Phenomenology (hep-ph) Quark star Pulsar Millisecond pulsar 0103 physical sciences Binary star Tolman–Oppenheimer–Volkoff equation 010306 general physics Astrophysics::Galaxy Astrophysics High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology High Energy Physics - Phenomenology Strange matter High Energy Physics::Experiment Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | Physical Review D. 95 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.95.103008 |
| Popis: | We present new stable solutions of the Tolman Oppenheimer Volkoff equations for quark stars using a quark matter equation of state based on the SU(3) Quark-Meson model that exhibits the onset of the chiral phase transition. These new solutions appear as two stable branches in the mass-radius relation allowing for so called twin stars, i.e. two stable quark star solutions with the same mass, but distinctly different radii. We find solutions which are compatible with causality, the stability conditions of dense matter, the astrophysical constraints of the rotation of the millisecond pulsar PSR J1748-2446ad and the 2$M_{\odot}$ pulsar mass constraint. 7 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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