Compact stars in Energy-Momentum Squared Gravity

Understand

A simple generalization to Einstein's general relativity (GR) was recently proposed which allows a correction term $T_{\alpha\beta}T^{\alpha\beta}$ in the action functional of the theory.

• This theory is called Energy-Momentum Squared Gravity (EMSG) and introduces a new coupling parameter $\eta$.
• EMSG resolves the big bang singularity and has a viable sequence of cosmological epochs in its thermal history.
• {Interestingly, in the vacuum EMSG is equivalent to GR, and its effects appear only inside the matter-energy distribution.