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The Bardeen-Petterson effect as the precession mechanism for the radio galaxy 3C 84 (NGC 1275)

Published online by Cambridge University Press:  24 February 2011

D. M. Teixeira ,
Z. Abraham ,
A. Caproni  and
D. Falceta-Gonçalves
D. M. Teixeira
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, R. do Matão 1226, Cidade Universitária, CEP 05508-900, São Paulo, SP, Brazil
Z. Abraham
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, R. do Matão 1226, Cidade Universitária, CEP 05508-900, São Paulo, SP, Brazil
A. Caproni
Affiliation:
Núcleo de Astrofísica Teórica, CETEC, Universidade Cruzeiro do Sul, R. Galvão Bueno 868, 01506-000, São Paulo, SP, Brazil
D. Falceta-Gonçalves
Affiliation:
Núcleo de Astrofísica Teórica, CETEC, Universidade Cruzeiro do Sul, R. Galvão Bueno 868, 01506-000, São Paulo, SP, Brazil Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, Rua Arlindo Béttio, 1000, 03828-000, São Paulo, SP, Brazil email: danilo@astro.iag.usp.br
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Abstract

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In this work we propose the Bardeen-Petterson effect as the precession mechanism of the jet precession in NGC 1275. To check if this is true we have estimated the angular momentum ratio and the aligment timescale predict by the theory and compared with the numerical results presented in the literature. We were able to explain the precession period assuming an accretion disk with column surface density in the form of a power law with exponent 0.6 < s < 0.7 and a black hole rotation with a spin of 0.23 < a∗<0.4.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 182 - 183
Copyright
Copyright © International Astronomical Union 2011

References

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