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26 April 2024 |
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An X-Ray View of the Jet-Cycle in the Radio Loud AGN 3C120 | | Anne M. Lohfink
; Christopher S. Reynolds
; Svetlana G. Jorstad
; Alan P. Marscher
; Eric D. Miller
; Hugh Aller
; Margo F. Aller
; Laura W. Brenneman
; Andrew C. Fabian
; Jon M. Miller
; Richard F. Mushotzky
; Michael A. Nowak
; Francesco Tombesi
; | | Date: |
21 May 2013 | | Abstract: | We present a study of the central engine in the broad-line radio galaxy 3C120
using a multi-epoch analysis of a deep XMM-Newton observation and two deep
Suzaku pointings (in 2012). In order to place our spectral data into the
context of the disk-disruption/jet-ejection cycles displayed by this object, we
monitor the source in the UV/X-ray bands, and in the radio band. We find three
statistically acceptable spectral models, a disk-reflection model, a jet-model
and a jet+disk model. Despite being good descriptions of the data, the
disk-reflection model violates the radio constraints on the inclination, and
the jet-model has a fine-tuning problem, requiring a jet contribution exceeding
that expected. Thus, we argue for a composite jet+disk model. Within the
context of this model, we verify the basic predictions of the jet-cycle
paradigm, finding a truncated/refilling disk during the Suzaku observations and
a complete disk extending down to the innermost stable circular orbit (ISCO)
during the XMM-Newton observation. The idea of a refilling disk is further
supported by the detection of the ejection of a new jet knot approximately one
month after the Suzaku pointings. We also discover a step-like event in one of
the Suzaku pointings in which the soft band lags the hard band. We suggest that
we are witnessing the propagation of a disturbance from the disk into the jet
on a timescale set by the magnetic field. | | Source: | arXiv, 1305.4937 | | Services: | Forum | Review | PDF | Favorites | |
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