متريك هاي سه پارامتري در حضور ميدان اسكالر

One of the fundamental questions in GR is structure an‎d nature of singularities. although in many well-known solution of GR singularities are hidden behind an event horizon, for some specific cases we face a phenomenon named naked singularities. Due to their role in discussions about CCC an‎d our understan‎ding of gravity an‎d space-time structure, naked singularities are of high theoretical importance. studying such singularities would give us valuable an‎d new insight on validity limit of GR an‎d their relation with quantum theories of gravity. Herein, a new series of metrics which are exact solution of GR in presence of a scalar field; an‎d have naked singularities as their distinct feature are introduced an‎d studied. These metrics have three free parameters; therefore, they provide a flexible framework for studying a broad family of well-known solution of GR. For instance, this metric for specific values of its free parameters reduces to gamma-metric an‎d EJNW. This property shows that the new solution not only can offer us an integrated framework for investigating naked singularities but also can be used as a theoretical tool to study effects of parameter changes on geometrical an‎d physical properties of such solutions. Results of such studies help us to gain a deeper an‎d more nuanced understan‎ding of nature of a naked singularity; an‎d open doors to new opportunities an‎d directions in the field of GR an‎d theoretical gravity.

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احمد شيرزاد

مسلم زارعي , مجيد عموشاهي , مالك باقري هاروني