Massive white dwarfs in Rastall-Rainbow gravity
Jie LiSchool of Nuclear Science and Technology, University of South China, Hengyang, 421001, ChinaBo YangSchool of Mathematics and Physics, University of South China, Hengyang, 421001, ChinaWenbin LinSchool of Mathematics and Physics, University of South China, Hengyang, 421001, China
2024en
ABI
Abstract
Abstract We explore the properties of white dwarfs within the framework of Rastall-Rainbow gravity. Employing the Chandrasekhar equation of state in conjunction with the modified Tolman-Oppenheimer-Volkoff equation, we calculate the mass-radius relations of white dwarfs. We also obtain the confidence levels for the Rastall-Rainbow parameters based on some observed white dwarfs. Numerical results show that Rastall-Rainbow gravity can not only align well with these observations, but also can account for the existence of the super-Chandrasekhar white dwarfs. In addition, the gravitational redshift, compactness and dynamical stability of white dwarfs are discussed in this modified gravitational theory.
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