English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Studies of neutron stars are extremely timely given the recent detection ofgravitational waves from a binary neutron star merger GW170817, and anInternational Space Station payload NICER currently in operation that aims todetermine radii of neutron stars to a precision better than 5%. In many cases,neutron star solutions are constructed numerically due to the complexity of thefield equations with realistic equations of state. However, in order to relateobservables like the neutron star mass and radius to interior quantities likecentral density and pressure, it would be useful to provide an accurate,analytic modeling of a neutron star interior. One such solution for static andisolated neutron stars is the Tolman VII solution characterized only by twoparameters (e.g. mass and radius), though its agreement with numericalsolutions is not perfect. We here introduce an improved analytic model based onthe Tolman VII solution by introducing an additional parameter to make theanalytic density profile agree better with the numerically obtained one. Thisadditional parameter can be fitted in terms of the stellar mass, radius andcentral density in an equation-of-state-insensitive way. In most cases, we findthat the new model more accurately describes realistic profiles than theoriginal Tolman VII solution by a factor of 2-5. Our results are first-stepcalculations towards constructing analytic interior solutions for morerealistic neutron stars under rotation or tidal deformation.

Improved Analytic Modeling of Neutron Star Interiors