A general relativistic mass-to-distance ratio for a set of megamaser AGN black holes

Villaraos, D; Herrera–Aguilar, Alfredo; Nucamendi, Ulises; Gónzalez-Juárez, G; Lizardo-Castro, Raúl

doi:10.1093/mnras/stac2973

Cited by 6 publications

(1 citation statement)

References 38 publications

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“…This information is encoded in the frequency shift of these photons, denoted as z dRN 1,2 in Equation (55), which is directly observable. Consequently, by performing a statistical fit [49,[51][52][53] or solving an inverse problem, as demonstrated in [54], the set of spacetime parameters M, Q, , Λ can be estimated. In other words, Equation ( 55) enables the extraction of the spacetime properties characterized by the black hole mass M, electric charge Q, deformation , and cosmological constant Λ through the measurement of frequency shifts in the photons, z dRN 1,2 .…”

Section: R)mentioning

confidence: 99%

Frequency Shift of Photons in the Spacetime of Deformed RN BH

et al. 2023

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The motion of photons and the frequency shift of photons emitted by particles orbiting the central black hole described by the deformed Reissner–Nordström spacetime metric is investigated. It has been shown that in spacetime, two stable photon spheres are formed due to the gravitational attraction of photons by the central gravitating compact object. It has been found that as spacetime parameters increase, charge and deformation photon spheres become smaller in size and the effect of the electric charge is stronger than the effect of the deformation parameter. The frequency shift of photons radiated by the particles at the equatorial plane becomes stronger for the smaller values of the deformation parameter and the electric charge of the deformed Reissner–Nordström black hole.

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Section: R)mentioning

confidence: 99%

Frequency Shift of Photons in the Spacetime of Deformed RN BH

et al. 2023

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Estimating the mass-to-distance ratio for a set of megamaser AGN black holes by employing a general relativistic method

González-Juárez,

Momennia,

Villalobos-Ramírez

et al. 2024

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Motivated by the recent achievements of a full general relativistic method in determining black hole (BH) parameters, we continue to estimate the mass-to-distance ratio of the supermassive BHs hosted at the core of the active galactic nuclei (AGNs) of the megamaser galaxies NGC 1320, NGC 1194, NGC 5495, and Mrk 1029. Our aim is to study the properties of super massive BHs at the centers of the selected AGNs by using a full general relativistic method that allows us to address the potential detection of relativistic effects within such astrophysical systems. In order to perform statistical estimations with publicly available observational data, we used a general relativistic model that describes BH rotation curves and further employed a Bayesian fitting method. We estimated the mass-to-distance ratio of the aforementioned BHs, their position and the recessional redshifts of the host galaxies produced by both peculiar motion and cosmological expansion of the Universe. Finally, we calculated the gravitational redshift of the closest maser to the BH for each AGN. This gravitational redshift is a general relativistic effect produced by the gravitational field of the BH properly included in the modelling.

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