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WARPING AND PRECESSION IN EXTRAGALACTIC MASER ACCRETION DISCS

Acceso Cerrado
ID Minciencias: ART-0001353599-5
Ranking: ART-ART_A2

Abstract:

Interferometric maser observations have been used to probe the physical conditions of extragalactic accretion discs at sub-parsec scales. The inferred kinematic of the water maser spots presents small deviations from Keplerian motions, which have been attributed to the warping and twisting of the parsec-scale disc. However, their physical origin is still a matter of debate in the literature. Motivated by this, we analyzed the general relativistic Bardeen-Petterson eect, driven by a Kerr black hole, as the potential physical mechanism responsible for the disc warping and precession in the nearby Seyfert 2 galaxies NGC 1068 and NGC 4258. Assuming a power-law accretion disc, whose parameters were constrained by the observational data, we derived the basic quantities concerning the Bardeen-Petterson eect for both sources. Some consequences from this peculiar relativistic mechanism are also presented in this work.

Tópico:

Astrophysical Phenomena and Observations

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Información de la Fuente:

SCImago Journal & Country Rank
FuenteRevista Mexicana de Astronomía y Astrofísica
Cuartil año de publicaciónNo disponible
Volumen35
IssueNo disponible
Páginas58 - 59
pISSNNo disponible
ISSN0185-1101

Enlaces e Identificadores:

Scienti ID0001353599-5Minciencias IDART-0001353599-5Openalex URLhttps://openalex.org/W1651228677
Artículo de revista