Horizon entropy in Cotton gravity is Bekenstein-Hawking plus a Codazzi correction whose sign diagnoses ordinary, vacuum, or phantom matter content.
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In quadratic curvature-matter coupled gravity, strange stars described by the MIT bag equation of state can attain a maximum mass of 3.11 solar masses, exceeding the general-relativistic limit and potentially accounting for the lighter companion in GW190814.
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Thermodynamic formulation of Cotton gravity in the Codazzi parametrization
Horizon entropy in Cotton gravity is Bekenstein-Hawking plus a Codazzi correction whose sign diagnoses ordinary, vacuum, or phantom matter content.
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Maximum mass limit of strange stars in quadratic curvature-matter coupled gravity
In quadratic curvature-matter coupled gravity, strange stars described by the MIT bag equation of state can attain a maximum mass of 3.11 solar masses, exceeding the general-relativistic limit and potentially accounting for the lighter companion in GW190814.