Mass-radius constraints for the neutron star EoS - Bayesian analysis

We suggest a new Bayesian analysis (BA) using disjunct M-R constraints for extracting probability measures for cold, dense matter equations of state (EoS). One of the key issues of such an analysis is the question of a deconfinement transition in compact stars and whether it proceeds as a crossover...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-01, Vol.668 (1), p.12038
Main Authors: Ayriyan, A., Alvarez-Castillo, D.E., Blaschke, D., Grigorian, H.
Format: Article
Language:English
Subjects:
Bayesian analysis
Equations of state
Heavy ions
Ionic collisions
Neutron stars
Neutrons
Phase diagrams
Phase transitions
Physics
Pulsars
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Summary:We suggest a new Bayesian analysis (BA) using disjunct M-R constraints for extracting probability measures for cold, dense matter equations of state (EoS). One of the key issues of such an analysis is the question of a deconfinement transition in compact stars and whether it proceeds as a crossover or rather as a first order transition. We show by postulating results of not yet existing radius measurements for the known pulsars with a mass of 2Mq that a radius gap of about 3 km would clearly select an EoS with a strong first order phase transition as the most probably one. This would support the existence of a critical endpoint in the QCD phase diagram under scrutiny in present and upcoming heavy-ion collision experiments.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/668/1/012038