Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Physik der Hadronen und Kerne
HK 20: Kern- und Teilchen-Astrophysik
HK 20.2: Vortrag
Montag, 7. März 2005, 14:15–14:30, TU MA144
Cooling of neutron stars with color superconducting quark core — •Hovik Grigorian1,2, David Blaschke3,4, and Dmitri Voskresensky5,6 — 1Fachbereich Physik, Universität Rostock, Germany — 2Department of Physics, Yerevan State University, 375025 Yerevan, Armenia — 3Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980, Dubna, Russia — 4Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany — 5Theory Division, GSI mbH, D–64291 Darmstadt, Germany — 6Moscow Institute for Physics and Engineering, 115409 Moscow, Russia
We present a nonlocal, chiral quark model which allows hybrid star configurations with color superconducting quark matter cores and masses below 1.4 M⊙. We study the cooling of these objects in isolation for different values of the gravitational mass and thus different composition and structure of the interior. phase We argue that, if phases with unpaired quarks were allowed, the corresponding hybrid stars would cool too fast to describe the neutron star cooling data existing by today. We discuss two possibilities to have all quarks paired in two-flavor quark matter under neutron star constraints: (1) the "2SC+X" phase and (2) the CSL phase. In both cases the weak pairing gaps are of the order of 10 - 100 keV with a decreasing density dependence giving the best explanation of the cooling data. Partially supported by Virtual Institute of the Helmholtz Association under grant No. VH-VI-041, DFG grant No. 436 RUS 117/17/03 and by the DAAD Partnership Programme.