Existence of hyperons in the pulsar PSRJ1614-2230

Anto Sulaksono; B. K. Agrawal

doi:10.1016/j.nuclphysa.2012.09.006

Existence of hyperons in the pulsar PSRJ1614-2230

Anto Sulaksono, B. K. Agrawal

Department of Physics

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

The possibility of existence of hyperons in the recently measured 2M_⊙ pulsar PSRJ1614-2230 is explored using a diverse set of nuclear equations of state calculated within the relativistic mean-field models. Our results indicate that the nuclear equations of state compatible with heavy-ion data allow the hyperons to exist in the PSRJ1614-2230 only for significantly larger values for the meson–hyperon coupling strengths. The maximum mass configurations for these cases contain sizable hyperon fractions (∼60%) and yet masquared their counterpart composed of only nucleonic matter.

Original language	English
Pages (from-to)	44-58
Number of pages	15
Journal	Nuclear Physics A
Volume	895
DOIs	https://doi.org/10.1016/j.nuclphysa.2012.09.006
Publication status	Published - 1 Dec 2012

Keywords

Dense matter
Neutron stars
Relativistic mean-field model

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10.1016/j.nuclphysa.2012.09.006

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abstract = "The possibility of existence of hyperons in the recently measured 2M⊙ pulsar PSRJ1614-2230 is explored using a diverse set of nuclear equations of state calculated within the relativistic mean-field models. Our results indicate that the nuclear equations of state compatible with heavy-ion data allow the hyperons to exist in the PSRJ1614-2230 only for significantly larger values for the meson–hyperon coupling strengths. The maximum mass configurations for these cases contain sizable hyperon fractions (∼60%) and yet masquared their counterpart composed of only nucleonic matter.",

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AB - The possibility of existence of hyperons in the recently measured 2M⊙ pulsar PSRJ1614-2230 is explored using a diverse set of nuclear equations of state calculated within the relativistic mean-field models. Our results indicate that the nuclear equations of state compatible with heavy-ion data allow the hyperons to exist in the PSRJ1614-2230 only for significantly larger values for the meson–hyperon coupling strengths. The maximum mass configurations for these cases contain sizable hyperon fractions (∼60%) and yet masquared their counterpart composed of only nucleonic matter.

KW - Dense matter

KW - Neutron stars

KW - Relativistic mean-field model

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VL - 895

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JO - Nuclear Physics A

JF - Nuclear Physics A

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Existence of hyperons in the pulsar PSRJ1614-2230

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Keywords

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