عنوان مجله
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INTERNATIONAL JOURNAL OF MODERN PHYSICS D
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چکیده
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A promising theory in modifying general relativity (GR) by violating the ordinary
energy–momentum conservation law in curved spacetime is the Rastall theory of gravity.
In this theory, geometry and matter fields are coupled to each other in a nonminimal
way. Here, we study thermodynamic properties of some black hole (BH) solutions in this
framework, and compare our results with those of GR.We demonstrate how the presence
of these matter sources amplifies the effects caused by the Rastall parameter in thermodynamic
quantities. Our investigation also shows that BHs with radius smaller than a
certain amount (≡ r0) have negative heat capacity in the Rastall framework. In fact, it
is a lower bound for the possible values of horizon radius satisfied by the stable BHs.
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