Compact stars with color–flavor-locked quark matter in gravitys rainbow
Errehymy A. Boshkayev K. Banerjee A. Daoud M. Alessa N. Abdel-Aty A.-H.
May 2025Elsevier B.V.
Physics of the Dark Universe
2025#48
The gravitys rainbow, an alternative gravity theory, postulates that the spacetime background depends on the energy of a test particle. In this scenario, we have investigated the existence of compact stars made of color–flavor locked (CFL) matter at asymptotically high density. Our numerical solutions to the modified TOV equations allow us to display the mass–radius (M−R) diagram for the given equation of state (EoS). We have further studied how the rainbow functions affect (M−R) relations and compared them with the GR counterpart. To constrain the permissible values of the parameters appearing in rainbow gravity, we have used the mass and radius measurements from the observed pulsars. We also include constraints obtained from the GW170817 event. Finally, we analyze the static stability, adiabatic index, and sound velocity profiles to strengthen our proposed model for the existence of quark stars in rainbow gravity.
Color–flavor locked matter , Quark stars , Rainbow gravity
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Astrophysics Research Centre, School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa
Center for Theoretical Physics, Khazar University, 41 Mehseti Str., Baku, AZ1096, Azerbaijan
National Nanotechnology Laboratory of Open Type, Almaty, 050040, Kazakhstan
Al-Farabi Kazakh National University, Al-Farabi avenue 71, Almaty, 050040, Kazakhstan
Institute of Nuclear Physics, Ibragimova, 1, Almaty, 050032, Kazakhstan
Department of Physics, Faculty of Sciences, Ibn Tofail University, P.O. Box 133, Kenitra, 14000, Morocco
Abdus Salam International Centre for Theoretical Physics, Miramare, Trieste, 34151, Italy
Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
Department of Physics, College of Sciences, University of Bisha, P.O. Box 344, Bisha, 61922, Saudi Arabia
Astrophysics Research Centre
Center for Theoretical Physics
National Nanotechnology Laboratory of Open Type
Al-Farabi Kazakh National University
Institute of Nuclear Physics
Department of Physics
Abdus Salam International Centre for Theoretical Physics
Department of Mathematical Sciences
Department of Physics
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