Constraining neutron star matter with quantum chromodynamics

Journal Article · Thu Jul 10 00:00:00 EDT 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/789/2/127· OSTI ID:22365663

Kurkela, Aleksi ^[1]; Fraga, Eduardo S.; Schaffner-Bielich, Jürgen ^[2]; Vuorinen, Aleksi ^[3]

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1. Physics Department, Theory Unit, CERN, CH-1211 Genève 23 (Switzerland)
2. Institute for Theoretical Physics, Goethe University, D-60438 Frankfurt am Main (Germany)
3. Department of Physics and Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland)

In recent years, there have been several successful attempts to constrain the equation of state of neutron star matter using input from low-energy nuclear physics and observational data. We demonstrate that significant further restrictions can be placed by additionally requiring the pressure to approach that of deconfined quark matter at high densities. Remarkably, the new constraints turn out to be highly insensitive to the amount—or even presence—of quark matter inside the stars.

• OSTI ID: 22365663
• Journal Information: Astrophysical Journal, Vol. 789, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DENSITY
EQUATIONS OF STATE
NEUTRON STARS
NEUTRONS
QUANTUM CHROMODYNAMICS
QUARK MATTER