TY - JOUR

T1 - Effect of free parametrized TOV on properties of neutron stars

AU - Purnamasari, D.

AU - Sulaksono, A.

N1 - Funding Information:
This research was supported by UI’s Q1Q2 grant No. NKB-0267/UN2.R3.1/HKP.05.00/2019 from Directorate of Research and Community Engagement, University of Indonesia.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

PY - 2020/7/14

Y1 - 2020/7/14

N2 - Recently, much progress has been reported about the properties of neutron stars (NS). However, in some parts such radius and moment of Inertia of NSs are still uncertain. We are interested in studying the properties of neutron stars also by using free parametric constraints. In this work, we use the modified Tolman Oppenheimer Volkoff (TOV) equation known as the parameterization of TOV (PTOV). Relativistic Mean Field (RMF) model is used to calculate the equation of state (EoS) of an NS. NS EoS is used as input to calculate some properties of NSs. The properties of neutron stars that are the focus of this research is mass, radius, and moment of inertia of slowly rotating NSs. We observe the effect of each free parameter added to the TOV equation, which results in a shift from the mass-radius diagram. We obtain the results which are consistent with the constraint of maximum mass M < 2.35 Mo and constraint of radius 11.38 < R1.4Mo (km) < 13.77. We observe that the contribution of each free parameter can increase mass and decrease the radii as well as provide an impact on the corresponding moment of inertia.

AB - Recently, much progress has been reported about the properties of neutron stars (NS). However, in some parts such radius and moment of Inertia of NSs are still uncertain. We are interested in studying the properties of neutron stars also by using free parametric constraints. In this work, we use the modified Tolman Oppenheimer Volkoff (TOV) equation known as the parameterization of TOV (PTOV). Relativistic Mean Field (RMF) model is used to calculate the equation of state (EoS) of an NS. NS EoS is used as input to calculate some properties of NSs. The properties of neutron stars that are the focus of this research is mass, radius, and moment of inertia of slowly rotating NSs. We observe the effect of each free parameter added to the TOV equation, which results in a shift from the mass-radius diagram. We obtain the results which are consistent with the constraint of maximum mass M < 2.35 Mo and constraint of radius 11.38 < R1.4Mo (km) < 13.77. We observe that the contribution of each free parameter can increase mass and decrease the radii as well as provide an impact on the corresponding moment of inertia.

UR - http://www.scopus.com/inward/record.url?scp=85089836099&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/1572/1/012022

DO - 10.1088/1742-6596/1572/1/012022

M3 - Conference article

AN - SCOPUS:85089836099

VL - 1572

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012022

T2 - 9th International Conference on Theoretical and Applied Physics, ICTAP 2019

Y2 - 26 September 2019 through 28 September 2019

ER -