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Sep 5 – 9, 2022
online
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Model independent constraints on dense matter equation of state

Sep 6, 2022, 4:15 PM
20m
online

online

FSU, Tallahassee, FL, USA

Speaker

NARESH KUMAR PATRA (BITS Pilani K K Birla Goa Campus, NH-B, South Goa, Goa, Pin-757040)

Description

We construct posterior distributions of equations of state (EoS),
relevant to the studies of neutron stars (NSs), by applying Bayesian
approach to two different models. The EoSs are subjected to minimal
constraints which correspond to a few basic properties of nuclear
matter at the saturation density and the low density pure neutron
matter EoS obtained from a precise next-to-next-to-next-to-leading
order (N$^{3}$LO) calculation in chiral effective field theory. The tidal deformability and radius of neutron star over a wide range of mass are found to be strongly co-related with pressure of $\beta$-equilibrated matter as well as the symmetry energy at densities higher than the saturation($\rho_0$) density in a model independent manner. These correlations are employed to parametrized the pressure for $\beta$-equilibrium matter, around 2$\rho_0$, as a function of neutron star mass and the corresponding tidal deformability.The maximum mass of neutron star is also strongly correlated with pressure of $\beta$-equilibrated matter and symmetric nuclear matter at densities $\sim$ 4.5$\rho_0$. The combined effects of available bounds on the NS properties in constraining the EoS are also explored.

Primary author

NARESH KUMAR PATRA (BITS Pilani K K Birla Goa Campus, NH-B, South Goa, Goa, Pin-757040)

Co-authors

Mr Md Adil Imam SK (Saha Institute of Nuclear Physics, Kolkatta, India) Dr Tuhin Malik (CFisUC, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal) Prof. Bijay Kumar Agrawal (Saha Institute Nuclear Physics, Kolkatta, India)

Presentation materials