| Issue |
EPL
Volume 134, Number 5, June 2021
|
|
|---|---|---|
| Article Number | 52001 | |
| Number of page(s) | 6 | |
| Section | Nuclear Physics | |
| DOI | https://doi.org/10.1209/0295-5075/134/52001 | |
| Published online | 11 August 2021 | |
The neutron star inner crust: An empirical essay
Centro Federal de Educação Tecnológica de Minas Gerais Campus VIII - CEP 37.022-560, Varginha, MG, Brasil
(a) luiz_kiske@yahoo.com (corresponding author)
Received: 15 December 2020
Accepted: 14 April 2021
In this work I study how the small contribution of the inner crust to the total equation of state (EoS) of a neutron star affects its mass-radius relation, focusing on the canonical mass of 1.4
. I build a polytropic empirical EoS of the kind 
in the range of 
and also calculate the speed of sound in this region. We see that different behaviours of the speed of sound can affect the radius of the canonical star by more than 1.1 km. This result can help us understand extreme results as GW170817, where some studies indicate that the radius of the canonical star cannot exceed 11.9 km.
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