4 papers
Impact of hyperon mixing on neutron star structure based on Skyrme-type equations of state: Systematic analysis of and three-body forces with Bayesisan inference
Taeho Lee, Yoonhak Nam, Kazuyuki Sekizawa
We study hyperonic density-dependent three-body effects in cold neutron-star matter using a Skyrme energy-density-functional framework. In beta-equilibrated matter, the e…
Data-driven exploration of the neutron pairing gap using Cassiopeia A neutron star observational data: Direct minimization
Yoonhak Nam, Kazuyuki Sekizawa
The rapid cooling observed in the Cassiopeia~A neutron star (Cas~A NS) is one of the most stringent tests for neutron-star cooling theory. While Cooper-pair breaking and formation…
Vortex creep heating in neutron star cooling with direct Urca processes in heavy neutron stars
Yoonhak Nam, Kazuyuki Sekizawa
Old, thermally bright neutron stars imply internal heating at late times. Among candidate mechanisms, vortex creep heating (VCH) provides a robust link between spin-down and fricti…
Vortex Creep Heating in Neutron Star Cooling: New Insights into Thermal Evolution of Heavy Neutron Stars
Yoonhak Nam, Kazuyuki Sekizawa
Neutron stars provide unique laboratories for probing physics of dense nuclear matter under extreme conditions. Their thermal and luminosity evolution reflects key internal propert…