X-ray Properties of 3C 111: Separation of Primary Nuclear Emission and Jet Continuum

Fedorova, E.; Hnatyk, B.; Жданов, В. І.; Popolo, A. Del

doi:10.3390/universe6110219

Cited by 5 publications

(6 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We applied the two recipes, giving us the possibility to distinguish between the disk/corona and the jet base contributions to the hard X-ray spectra of the RT AGN 3C 120 proposed in our previous work [27]. We analyzed the data of the XMM-Newton, INTEGRAL, SWIFT, and Suzaku observations during the 20 periods together with the radio data observed by the Planck mission.…”

Section: Discussionmentioning

confidence: 99%

“…The jets are bright in the radio range, which enables us to distinguish between the jet base and nuclear counterparts in the RL AGN spectra in X-rays as well. We use the same spectral component distinguishing method used in our previous work [27] for 3C 111 and in [31] for a sample of blazars. In [27], we proposed two ways to determine the jet base and primary nuclear counterparts in the X-ray spectrum.…”

Section: Distinguishing Nuclear and Jet Base Spectral Componentsmentioning

confidence: 99%

“…We use the same spectral component distinguishing method used in our previous work [27] for 3C 111 and in [31] for a sample of blazars. In [27], we proposed two ways to determine the jet base and primary nuclear counterparts in the X-ray spectrum.…”

Section: Distinguishing Nuclear and Jet Base Spectral Componentsmentioning

confidence: 99%

“…Here, we compare the results of our spectral fitting for 3C 120 with the "jet-disk cycle" and "plasmoid magnetic reconnection" models. To separate the "jet base" spectral component from that of the "disc/corona" one, we use the same two recipes we proposed in [27] for AGN 3C 111. The method is based on the spectral properties of the jet radio synchrotron and X-ray synchrotron self-Compton (SSC) or inverse Compton (IC) emissions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

3C 120 Disk/Corona vs. Jet Variability in X-rays

Fedorova

Popolo

2023

Universe

Self Cite

View full text Add to dashboard Cite

The 3C120 (Mrk 1506, UGC 03087, Mrk 9014) is a type 1 Seyfert (Sy1)/broad-line radio galaxy (BLRG) with intriguing variable jet activity featuring “dip” and “outburst” phases. Significant X-ray observational datasets have been collected for 3C120 by INTEGRAL, XMM-Newton, SWIFT, Suzaku, and other X-ray observational facilities. The overall X-ray spectrum of 3C 120 is too soft for typical radio-loud AGN, likely due to both variable spectral shape and jet contamination. Separating the “jet base” and nuclear (disc/corona) counterparts in the X-ray spectrum of 3C 120 can provide us with the possibility to investigate its variability in a more detailed way. Our objectives are to estimate separately the time variations of the accretion disc/corona and SSC/IC jet emission counterparts in the 3C 120 X-ray spectra and to analyze the physical state of the nucleus during different phases. Here, we attempt to use the connections between the synchrotron radio- and X-ray SSC/IC jet spectra and their photon indices and the dependence between the nuclear continuum and Fe-K iron luminescent line emission near 6.4 keV to separate the nuclear and jet base contributions to the total X-ray continuum. Using the X-ray observational dataset of 3C 120, we obtained separated fluxes that were interpreted as originating from the nucleus (disc/corona) and non-thermal SSC/IC jet base contributions. After this component separation, we identified the accretion disc/corona and jet states during different phases and compared them with the “jet/disk cycle” (Lohfink) and “magnetic plasmoid reconnection” (Shukla/Manheim) models.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Distinguishing Nuclear and Jet Base Spectral Componentsmentioning

confidence: 99%

Section: Distinguishing Nuclear and Jet Base Spectral Componentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

3C 120 Disk/Corona vs. Jet Variability in X-rays

Fedorova

Popolo

2023

Universe

Self Cite

View full text Add to dashboard Cite

show abstract

“…A prominent example is the nearby Fanaroff-Riley II radio galaxy 3C 111, at a redshift of z = 0.049 (Truebenbach & Darling 2017). Its parsec-scale jet has been observed in the radio band (Kadler et al 2008), in X-rays (Marscher 2006;Fedorova et al 2020), and up to the γ-ray band (Grandi et al 2012). Long-term VLBI monitoring of 3C 111 reveals the existence of bright superluminal knots (Preuss et al 1988;Kadler et al 2008;Schulz et al 2020).…”

Section: Observations Of Trailing Shocks In 3c 111mentioning

confidence: 99%

Flare echoes from relaxation shocks in perturbed relativistic jets

Clairfontaine

Méliani

Zech

2022

A&A

View full text Add to dashboard Cite

Context. One of the main scenarios to account for the multiwavelength flux variability observed in relativistic jets of active galactic nuclei (AGNs) is based on the diffusive shock acceleration of a population of relativistic electrons on internal shocks of various origins. Any complete AGN emission scenario has to be able to explain the wide range of observed variability timescales, which change over several orders of magnitude between the radio and gamma-ray band. In addition to observations of flux variability, constraints are also provided by very-long-baseline interferometry (VLBI), which shows a large variety of moving and standing emission zones with distinct behaviors. Aims. Combining dynamic hydrodynamic jet simulations with radiative transfer, we aim to characterize the evolution of stationary and moving emission zones in the jet and study their multiwavelength signatures through emission maps and light curves. We focus our study on flare events that occur during strong interactions between moving ejecta and stationary recollimation shocks. Such events are shown to lead to a significant perturbation of the stationary jet structure. Methods. We simulate relativistic jets with the magneto-hydrodynamic code MPI-AMRVAC and inject nonthermal particle distributions of electrons into shock regions. We follow the propagation of a moving shock and its interactions with a structure of standing recollimation shocks in the jet. Synchrotron emission and radiative transfer are calculated in the post-processing code RIPTIDE for given observation angles and frequencies, assuming a turbulent magnetic field and taking the light crossing effect into account. Results. In the case of strong shock–shock interactions, we demonstrate the appearance of trailing components behind the leading moving shock. The latter destabilizes the jet, causing the emergence of oscillating standing shocks and relaxation shocks. Emissions from these regions can dominate the overall flux or lead to “flare echoes” in the light curve. Another observational marker for the presence of relaxation shocks appears in time-distance plots of bright VLBI components of the jet. Our scenario provides a plausible explanation for radio VLBI observations of the radio galaxy 3C 111, where trailing components were observed during a radio outburst event in 1997, and may be applicable to other sources with similar features.

show abstract

Separating the Spectral Counterparts in NGC 1275/Perseus Cluster in X-Rays

Fedorova,

Zadorozhna,

Tugay

et al. 2024

Astronomy

View full text Add to dashboard Cite

We present a model-independent method for separating the spectral counterparts of the active galactic nucleus (AGN) NGC 1275 from the surrounding emission of the Perseus cluster, as observed by Suzaku/XIS cameras. The Perseus cluster emission extends to higher energies than typically observed in AGN environments, reaching up to 9–10 keV. This necessitates precise separation of AGN and cluster spectra. To circumvent the degeneracy arising from numerous spectral fitting parameters, including elemental abundances, thermal and Compton emissions from the nucleus, and spectral parameters of the jet synchrotron self-Compton/inverse Compton emissions, we avoid traditional spectral fitting methods. Instead, we leverage spatial resolution and employ a double background subtraction approach. We apply this procedure to the complete set of Suzaku/XIS observational data for NGC 1275, resulting in cleaned spectra and a light curve of the AGN emission in this system. To demonstrate the applicability of our method, we also utilize the available XMM-Newton/EPIC data.

show abstract

X-ray Properties of 3C 111: Separation of Primary Nuclear Emission and Jet Continuum

Cited by 5 publications

References 53 publications

3C 120 Disk/Corona vs. Jet Variability in X-rays

3C 120 Disk/Corona vs. Jet Variability in X-rays

Flare echoes from relaxation shocks in perturbed relativistic jets

Separating the Spectral Counterparts in NGC 1275/Perseus Cluster in X-Rays

Contact Info

Product

Resources

About