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- W3112286787 abstract "By using a general relativistic method to estimate the Schwarzschild black hole mass in terms of astrophysical observable quantities, we reveal the observation of the gravitational redshift in galaxies, in particular in the Active Galactic Nucleus of NGC 4258. The general relativistic redshift/blueshift comprises two components: the gravitational redshift due to the spacetime curvature generated by the mass of the black hole in its vicinity, and the kinematic one, originated by the photons' Doppler effect. We applied our method to the largest data set of water megamaser measurements on the accretion disk of the NGC 4258 active galaxy. The quantification of this general relativistic effect (GRE) allows us to explain the observed asymmetric flattening in the redshift/blueshift data of the NGC 4258 dynamical system, specifically, the 2 sigma maximum deviation from Keplerian motion in the masers rotation curve. Moreover, this GRE can be used to estimate the black hole mass in a precise way; thus, we improve over previous Newtonian or perturbative relativistic analyses in the accuracy in the NGC 4258 black hole mass estimate by an order of magnitude: M=(4.3741 +/- 0.0018) X 10^7 solar masses. Hence, these results provide the confirmation of a new general relativistic effect, the gravitational redshift, observed in the strong gravitational regime at galactic scales." @default.
- W3112286787 created "2020-12-21" @default.
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- W3112286787 date "2020-12-11" @default.
- W3112286787 modified "2023-09-27" @default.
- W3112286787 title "The Gravitational Redshift Observed in the Nucleus of NGC 4258 and its Impact on the Estimation of the Central Black Hole Mass" @default.
- W3112286787 hasPublicationYear "2020" @default.
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