New class of compact stars: Pion stars
Copyright policy )New class of compact stars: Pion stars
We investigate the viability of a new type of compact star whose main constituent is a Bose-Einstein condensate of charged pions. Several different setups are considered, where a gas of charged leptons and neutrinos is also present. The pionic equation of state is obtained from lattice QCD simulations in the presence of an isospin chemical potential, and requires no modeling of the nuclear force. The gravitationally bound configurations of these systems are found by solving the Tolman-Oppenheimer-Volkov equations. We discuss weak decays within the pion condensed phase and elaborate on the generation mechanism of such objects.
8 pages, 5 figures. v2 includes discussion of weak processes in the condensed phase and effects of neutrinos. v3 fixed typos, minor changes, matches journal version
- Institute for Theoretical Physics Germany
- Bielefeld University Germany
- Universidade de São Paulo Brazil
- Federal University of Rio de Janeiro Brazil
- UNIVERSIDADE FEDERAL DO RIO DE JANEIRO Brazil
Nuclear Theory, Nuclear physics, Neutron star, FOS: Physical sciences, Astrophysics, Quantum mechanics, Electron, Lepton, Nuclear Theory (nucl-th), High Energy Physics - Lattice, High Energy Physics - Phenomenology (hep-ph), Neutrino, Observation and Study of Gravitational Waves Phenomenon, Cosmological Parameters and Dark Energy, Many-Body Physics with Ultracold Gases, High Energy Astrophysical Phenomena (astro-ph.HE), Equation of state, Bose-Einstein Condensation, Physics, High Energy Physics - Lattice (hep-lat), Particle physics, Astronomy and Astrophysics, Acoustics, Stars, Lattice (music), Atomic and Molecular Physics, and Optics, Compact star, High Energy Physics - Phenomenology, Physics and Astronomy, Physical Sciences, Pion, Isospin, Astrophysics - High Energy Astrophysical Phenomena, Quantum chromodynamics
Nuclear Theory, Nuclear physics, Neutron star, FOS: Physical sciences, Astrophysics, Quantum mechanics, Electron, Lepton, Nuclear Theory (nucl-th), High Energy Physics - Lattice, High Energy Physics - Phenomenology (hep-ph), Neutrino, Observation and Study of Gravitational Waves Phenomenon, Cosmological Parameters and Dark Energy, Many-Body Physics with Ultracold Gases, High Energy Astrophysical Phenomena (astro-ph.HE), Equation of state, Bose-Einstein Condensation, Physics, High Energy Physics - Lattice (hep-lat), Particle physics, Astronomy and Astrophysics, Acoustics, Stars, Lattice (music), Atomic and Molecular Physics, and Optics, Compact star, High Energy Physics - Phenomenology, Physics and Astronomy, Physical Sciences, Pion, Isospin, Astrophysics - High Energy Astrophysical Phenomena, Quantum chromodynamics
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