Abstract
The implications of hyperon pairing for the thermal evolution of neutron stars containing hyperons are investigated. The outcomes of cooling simulations are compared for neutron star models composed only of nucleons and leptons, models including hyperons, and models including pairing of hyperons. We show that lambda and neutron pairing suppresses all possible fast neutrino emission processes in not too massive neutron stars. The inclusion of lambda pairing yields better agreement with X-ray observations of pulsars. Particularly, the surface temperatures deduced from X-ray observations within the hydrogen atmosphere model are more consistent with the thermal history of neutron stars containing hyperons, if the critical temperature for the onset of lambda and nucleon pairing is not too small.
Original language | English |
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Pages (from-to) | L99-L102 |
Journal | Astrophysical Journal |
Volume | 504 |
Issue number | 2 PART II |
DOIs | |
State | Published - 1998 |
Bibliographical note
Funding Information:C. S. gratefully acknowledges the Bavarian State for financial support. J. S. B. is supported by the Alexander von Humboldt-Stiftung and by the US Department of Energy under contract DE-AC03-76SF00098.
Keywords
- Stars: Evolution
- Stars: Neutron