From the 1 of 19 linked papers with an AI index.
19 papers
Testing dark matter density profiles based on Padé approximants of different orders
Talgar Konysbayev, Orlando Luongo, Marco Muccino +5
We investigate whether low-order Padé rational functions can be used as empirical density profiles for modeling dark matter halos from galaxy RCs. We introduce three parameterizat…
Schwarzschild-like Black Holes Submerged in an Exponential Density Dark Matter Profile
Kuantay Boshkayev, Yassine Sekhmani, Soroush Zare +3
We study a class of Schwarzschild black holes embedded in an exponential-spheroidal dark matter halo, modelled by a phenomenological density profile . By sol…
Thermodynamic acceptability of spherically symmetric perfect-fluid solutions in general relativity
Dina Demissenova, Nurzada Beissen, Kuantay Boshkayev +1
The paper extends the usual physical acceptability criteria for static, spherically symmetric perfect‑fluid solutions of Einstein’s equations by adding thermodynamic conditions bas…
Shirokov and Shapiro Effects in the Hartle-Thorne Spacetime
Anuar Idrissov, Kuantay Boshkayev, Serzhan Momynov +4
We investigate the influence of rotation and quadrupole deformations of astrophysical compact objects on the Shirokov and Shapiro effects within the Hartle-Thorne spacetime, which…
Newtonian Shirokov Effect: Epicyclic Frequency Splitting from Mass Multipoles
Anuar Idrissov, Kuantay Boshkayev, Abylaikhan Tlemissov +1
We analyze small oscillations of nearly circular orbits in an axisymmetric Newtonian potential expanded in mass multipoles, as the classical counterpart of the relativistic Shiroko…
Shadow, Emission, and Strong-Field Lensing of Dilatonic Black Holes
Kuantay Boshkayev, Ainur Urazalina, Aidana Kurmanbek +2
We study the shadow and strong-field optical properties of a static, spherically symmetric dyon-like dilatonic black hole. The photon sphere radius, critical impact parameter, and…