Hyperons in Neutron Stars

15th International Conference on Strangeness in Quark Matter

Vidaña, Isaac^1

Centro de Fí

sica da Universidade de Coimbra (CFisUC), Department of Physics, University of Coimbra, Coimbra

PT-3004-516, Portugal^1

关键词: Measurements of;    Millisecond pulsars;    Mode instabilities;    Neutron stars;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012031/pdf
DOI  :  10.1088/1742-6596/668/1/012031

来源: IOP

【 摘 要 】

In this work I briefly review some of the effects of hyperons on the properties of neutron and proto-neutron stars. In particular, I revise the problem of the strong softening of the EoS, and the consequent reduction of the maximum mass, induced by the presence of hyperons, a puzzle which has become more intringuing and difficult to solve because of the recent measurements of the unusually high masses of the millisecond pulsars PSR J1903+0327 (1.667 ± 0.021Mo), PSR J1614-2230 (1.97 ± 0.04Mo), and PSR J0348+0432 (2.01 ± 0.04Mo). Some of the solutions proposed to tackle this problem are discussed. Finally, I re-examine also the role of hyperons on the cooling properties of newly born neutron stars and on the so-called r-mode instability.