Implications of hyperon pairing for cooling of neutron stars

Christoph Schaab*, Shmuel Balberg, Jürgen Schaffner-Bielich

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

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 languageAmerican English
Pages (from-to)L99-L102
JournalAstrophysical Journal
Volume504
Issue number2 PART II
DOIs
StatePublished - 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

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