SIMBAD references

2004A&A...423.1063G - Astronomy and Astrophysics, volume 423, 1063-1071 (2004/9-1)

Enhanced cooling of neutron stars via Cooper-pairing neutrino emission.


Abstract (from CDS):

We simulate cooling of superfluid neutron stars with nucleon cores where the direct Urca process is forbidden. We adopt density-dependent critical temperatures Tcp(ρ) and Tcn(ρ) of singlet-state proton and triplet-state neutron pairing in a stellar core and consider strong proton pairing (with maximum Tcpmax>5x109K) and moderate neutron pairing (Tcnmax∼6x108K). When the internal stellar temperature T falls below Tcnmax, the neutrino luminosity LCP due to Cooper pairing of neutrons behaves ∝ T8, just as that produced by the modified Urca process (in a non-superfluid star) but is higher by about two orders of magnitude. In this case the Cooper-pairing neutrino emission acts like an enhanced cooling agent. By tuning the density dependence Tcn(ρ) we can explain observations of cooling isolated neutron stars in the scenario in which the direct Urca process or a similar process in kaon/pion condensed or quark matter are absent.

Abstract Copyright:

Journal keyword(s): stars: neutron - dense matter

Simbad objects: 13

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