| Full text | |
| Author(s): |
Falceta-Goncalves, D.
[1]
;
Caproni, A.
[1]
;
Abraham, Z.
[2]
;
Teixeira, D. M.
[2]
;
de Gouveia Dal Pino, E. M.
[2]
Total Authors: 5
|
| Affiliation: | [1] Univ Cruzeiro Sul, Nucleo Astrofis Teor, BR-01506000 Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Astrophysical Journal Letters; v. 713, n. 1, p. L74-L78, APR 10 2010. |
| Web of Science Citations: | 38 |
| Abstract | |
The Perseus galaxy cluster is known to present multiple and misaligned pairs of cavities seen in X-rays, as well as twisted kiloparsec-scale jets at radio wavelengths; both morphologies suggest that the active galactic nucleus (AGN) jet is subject to precession. In this work, we performed three-dimensional hydrodynamical simulations of the interaction between a precessing AGN jet and the warm intracluster medium plasma, whose dynamics are coupled to a Navarro-Frenk-White dark matter gravitational potential. The AGN jet inflates cavities that become buoyantly unstable and rise up out of the cluster core. We found that under certain circumstances precession can originate multiple pairs of bubbles. For the physical conditions in the Perseus cluster, multiple pairs of bubbles are obtained for a jet precession opening angle >40 degrees acting for at least three precession periods, reproducing both radio and X-ray maps well. Based on such conditions, assuming that the Bardeen-Peterson effect is dominant, we studied the evolution of the precession opening angle of this system. We were able to constrain the ratio between the accretion disk and the black hole angular momenta as 0.7-1.4. We were also able to constrain the present precession angle to 30 degrees-40 degrees, as well as the approximate age of the inflated bubbles to 100-150 Myr. (AU) | |
| FAPESP's process: | 09/10102-0 - Numerical studies of collisional and collisionless magnetized plasmas in Astrophysics |
| Grantee: | Diego Antonio Falceta Gonçalves |
| Support Opportunities: | Regular Research Grants |