Searching for phase transitions in neutron stars with modified Gaussian processes

Debora Mroczek, M. Coleman Miller, Jacquelyn Noronha-Hostler, Nicolas Yunes

Research output: Contribution to journalConference articlepeer-review


Gaussian processes provide a promising framework by which to extrapolate the equation of state (EoS) of cold, catalyzed matter beyond 1 - 2 times nuclear saturation density. Here we discuss how to extend Gaussian processes to include nontrivial features in the speed of sound, such as bumps, kinks, and plateaus, which are predicted by nuclear models with exotic degrees of freedom. Using a fully Bayesian analysis incorporating measurements from X-ray sources, gravitational wave observations, and perturbative QCD results, we show that these features are compatible with current constraints and report on how the features affect the EoS posteriors.

Original languageEnglish (US)
Article number012006
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - 2023
Externally publishedYes
Event9th International Workshop Compact Stars in the QCD Phase Diagram: From RHIC to Astrophysics, Probing the Quark-Gluon Plasma, CSQCD 2022 - Banff, Canada
Duration: Aug 1 2022Aug 5 2022

ASJC Scopus subject areas

  • General Physics and Astronomy


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