157 research outputs found
Dense QCD and phenomenology of compact stars
I discuss three topics in physics of massive (two solar-mass and larger)
neutron stars containing deconfined quark matter: (i) the equation of state of
deconfined dense quark matter and its color superconducting phases, (ii) the
thermal evolution of stars with quark cores, (iii) color-magnetic flux tubes in
type-II superconducting quark matter and their dynamics driven by Aharonov-Bohm
interactions with unpaired fermions.Comment: 8 pages, 3 figures. Contribution to the proceedings of "Xth Quark
Confinement and the Hadron Spectrum", October 8-12, 2012, Munich, German
Exploring phases of dense QCD with compact stars
I review a number of recent developments in the physics of compact stars
containing deconfined quark matter, including (a)~their cooling with possible
phase transition from a fully gapped to a gapless phase of QCD at low
temperatures and large isospin, (b)~the transport coefficients of the 2SC phase
and the role played by the Aharonov-Bohm interactions between flux-tubes and
unpaired fermions; (c)~rapidly rotating compact stars and spin-down and spin-up
induced phase transition between hadronic and QCD matter as well as between
different phases of QCD.Comment: 11 pages, 6 figures, Proceedings of the 5th International Conference
on New Frontiers in Physics (ICNFP2016), 6-14 July 2016, Kolymbari, Crete,
Greec
Rapid cooling of the compact star in Cassiopea A as a phase transition in dense QCD
We present a model of the compact star in Cassiopea A that accounts for its
unusually fast cooling behavior. This feature is interpreted as an enhancement
in the neutrino emission triggered by a transition from a fully gapped,
two-flavor, color-superconducting phase to a crystalline phase or an
alternative gapless, color-superconducting phase. By fine-tuning a single
parameter -- the temperature of this transition -- a specific cooling scenario
can be selected that fits the Cas A data. Such a scenario requires a massive
star and is, therefore, distinctive from models invoking
canonical 1.4 mass star with nucleonic pairing alone.Comment: 5 pages, 3 figures, v2 and v3: minor changes, matches the version
publised in A & A Letter
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