Neutron star cooling: Theoretical aspects and observational constraints
D. G. Yakovlev (1), O. Y. Gnedin (2), A. D. Kaminker (1), K. P., Levenfish (1), A. Y. Potekhin (1) ((1) Ioffe Phys.-Tech. Institute, St., Petersburg; (2) STScI)
TL;DR
This paper reviews the theoretical understanding of neutron star cooling, focusing on key processes like the direct Urca process and superfluidity, and discusses how observations can constrain the properties of dense matter inside neutron stars.
Contribution
It provides a comprehensive review of neutron star cooling theories and explores how observational data can be used to constrain the properties of supranuclear matter.
Findings
Cooling processes depend on superfluidity and direct Urca operation
Observations can constrain dense matter parameters
Thermal states of accreting neutron stars are analyzed
Abstract
The cooling theory of isolated neutron stars is reviewed. The main cooling regulators are discussed, first of all, operation of direct Urca process (or similar processes in exotic phases of dense matter) and superfluidity in stellar interiors. The prospects to constrain gross parameters of supranuclear matter in neutron-star interiors by confronting cooling theory with observations of isolated neutron stars are outlined. A related problem of thermal states of transiently accreting neutron stars with deep crustal heating of accreted matter is discussed in application to soft X-ray transients.
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Geophysics and Gravity Measurements · Astrophysical Phenomena and Observations