2013

Compact stars in Eddington-inspired Born-Infeld gravity: Anomalies associated with phase transitions

Sham, Y. -H., Leung, P. T., Lin, L. -M.

Understand

We study how generic phase transitions taking place in compact stars constructed in the framework of the Eddington-inspired Born-Infeld (EiBI) gravity can lead to anomalous behavior of these stars.

For the case with first-order phase transitions, compact stars in EiBI gravity with a positive coupling parameter $\kappa $ exhibit a finite region with constant pressure, which is absent in general relativity.
However, for the case with a negative $\kappa $, an equilibrium stellar configuration cannot be constructed.
Hence, EiBI gravity seems to impose stricter constraints on the microphysics of stellar matter.

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