Hyperons in Neutron Stars - INSPIRE

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Hyperons in Neutron Stars

Isaac Vidaña
(
- Coimbra U.
)

Sep 11, 2015

8 pages

Part of Proceedings, 15th International Conference on Strangeness in Quark Matter (SQM 2015) : Dubna, Moscow region, Russia, July 6-11, 2015

Published in:

J.Phys.Conf.Ser. 668 (2016) 1, 012031

Contribution to:

- SQM 2015

Published: Jan 18, 2016

e-Print:

1509.03587 [nucl-th]

DOI:

10.1088/1742-6596/668/1/012031

View in:

ADS Abstract Service

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Abstract: (IOP)

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 ± 0.021M(⊙)), PSR J1614-2230 (1.97 ± 0.04M(⊙)), and PSR J0348+0432 (2.01 ± 0.04M(⊙)). 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.

Note:

8 pages, 3 figures. Plenary talk at the 15th International Conference on Strangeness in Quark Matter (SQM2015), 6-11 July 2015, JINR, Dubna, Russia. To be published in Journal of Physics: Conference Series (JPCS)

hyperon: effect
neutron star
protoneutron star
equation of state
stability
pulsar
hyperon

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