Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 20: Kern- und Teilchen-Astrophysik
HK 20.4: Vortrag
Montag, 7. März 2005, 14:45–15:00, TU MA144
Two-flavor color superconducting quark matter phases in compact stars — •Deborah Nancy Aguilera1,2, David Blaschke1,3,4, and Hovik Grigorian5 — 1Fachbereich Physik, Universität Rostock, Universitätsplatz 1, D-18051 Rostock, Germany — 2Instituto de Física Rosario, Bv. 27 de febrero 210 bis, 2000 Rosario, Argentina — 3Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, 141980 Dubna, Russia — 4Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany — 5Department of Physics, Yerevan State University, Alex Manoogian Str. 1, 375025 Yerevan, Armenia
We study the occurrence of two-flavor color superconducting phases
(2SC = two-flavor color superconductivity and CSL = color spin locking)
in quark matter under compact star constraints within a nonlocal model.
We analyze the sensitivity to changes in the formfactor and the
coupling constants for the quark interaction.
As observables we calculate the configurations and
show that stable hybrid star branches with 2SC quark cores could
explain
observations of small compact objects.
The CSL phase leads to a pairing pattern in which all
quarks are paired and the smallest gaps do not exceed 1 MeV.
Such a phase is a candidate for a successful explanation of the cooling
behaviour of neutron stars with quark matter cores.
Partially supported by the Virtual Institute of the Helmholtz
Association
under grant no. VH-VI-041 and by the Landesgraduiertenförderung MV.