Interior Matter Estimates of Rapidly Rotating Compact Stars
Na-na Pan, Xiao-ping Zheng
TL;DR
This paper investigates the internal composition of rapidly rotating compact stars by comparing theoretical models with observational data, suggesting SAX J1808.4-3658 contains exotic matter and XTE J1739-285 is a hybrid star.
Contribution
It introduces a method to constrain the matter composition of compact stars using rotation frequencies and observational data.
Findings
SAX J1808.4-3658 likely contains exotic matter
XTE J1739-285 is identified as a hybrid star
The approach provides tighter constraints on stellar matter composition
Abstract
The authors try to probe the inner components of rapidly rotating compact stars such as the millisecond pulsar SAX J1808.4-3658 and the possible sub-millisecond pulsar XTE J1739-285 in their own way by comparing the genuine rotation frequencies under different theoretical models with the observational data, which may exert more stringent constraint on matter composition of compact stars. According to their treatment, the SAX J1808.4-3658 is a star with exotic matter and XTE J1739-285 a hybrid star.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Pulsars and Gravitational Waves Research · Geophysics and Gravity Measurements