August 29, 2022 to September 4, 2022
America/New_York timezone

No show: Nearly model independent constraints on dense matter equation of state in a Bayesian approach

Not scheduled
20m
Parallel session talk Particle and Nuclear Astrophysics PNA: Particle and Nuclear Astrophysics

Speaker

Naresh Kumar Patra (BITS Pilani K K Birla Goa Campus, NH-B, South Goa, Goa, Pin-757040)

Description

We apply Bayesian approach to construct a large number of minimally constrained equations of state (EoSs) and study their correlations with a few selected properties of a neutron star (NS). Our set of minimal constraints includes a few basic properties of saturated nuclear matter and low density pure neutron
matter EoS which is 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 NS with mass $1-2 M_\odot$ are found to be strongly correlated with the pressure of $\beta$-equilibrated matter at densities higher than the saturation density ($\rho_0 = 0.16$ fm$^{-3}$) in a nearly model-independent manner. These correlations are employed to parameterize the pressure for $\beta$-equilibrated matter, around 2$\rho_0$, as a function of neutron star mass and the corresponding tidal deformability. The maximum mass of a neutron star is also found to be strongly correlated with the pressure of $\beta$-equilibrated matter at densities $\sim 4.5\rho_0$.

Primary authors

Naresh Kumar Patra (BITS Pilani K K Birla Goa Campus, NH-B, South Goa, Goa, Pin-757040) Mr Sk Md Adil Imam (Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India.) Prof. Bijay Kumar Agrawal (Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India.) Prof. Arunava Mukharjee (Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India.) Dr Tuhin Malik (CFisUC, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal)

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