Constraining X-ray emission of magnetically arrested disk (MAD) by radio-loud AGNs with extreme ultraviolet (EUV) deficit

Abstract

Aims. Active galactic nuclei (AGNs) with EUV deficit are suggested to be powered by a MAD surrounding the black hole, where the slope of EUV spectra (${\alpha }_{\mathrm{EUV}}$) is found to possess a well positive relationship with the jet efficiency. In this work, we investigate the properties of X-ray emission in AGNs with EUV deficit for the first time. Methods. We construct a sample of 15 objects with EUV deficit to analyse their X-ray emission. The X-ray luminosity in 13 objects are newly processed by ourself, while the other 2 sources are gathered from archival data. Results. It is found that the average X-ray flux of AGNs with EUV deficit are 4.5 times larger than that of radio-quiet AGNs (RQAGNs), while the slope of relationship between the optical-UV luminosity ($L_{\mathrm{UV}}$) and the X-ray luminosity ($L_{\mathrm{X}}$) is found to be similar with that of RQAGNs. For comparison, the average X-ray flux of radio-loud AGNs (RLAGNs) without EUV deficit is about 2-3 times larger than that of RQAGNs. A strong positive correlation between ${\alpha }_{\mathrm{EUV}}$ and radio-loudness ($R_{\mathrm{UV}}$) is also reported. However, there is no strong relationship between $L_{\mathrm{X}}$ and the radio luminosity ($L_{\mathrm{R}}$). Conclusions. Both the excess of X-ray emission of RLAGNs with EUV deficit and the strong ${\alpha }_{\mathrm{EUV}}$-$R_{\mathrm{UV}}$ relationship can be qualitatively explained with MAD scenario, which can help to constrain the theoretical model of MAD.

arXiv comment5 pages, 3 figures, accepted by A&A Letter

References in corpus (38)

• Efficient Generation of Jets from Magnetically Arrested Accretion on a Rapidly Spinning Black Hole
• A fundamental plane of black hole activity
• General Relativistic Magnetohydrodynamic Simulations of Magnetically Choked Accretion Flows around Black Holes
• Relativistic Jets in Active Galactic Nuclei
• Magnetically Arrested Disk: An Energetically Efficient Accretion Flow
• Going with the flow: can the base of jets subsume the role of compact accretion disk coronae?
• The Rest-Frame Extreme Ultraviolet Spectral Properties of QSOs
• The Soft X-Ray Properties of a Complete Sample of Optically Selected Quasars II. Final Results
• A Composite HST Spectrum of Quasars
• X-ray reverberation around accreting black holes
• Radio / X-ray correlation in the low/hard state of GX 339--4
• The X-ray to optical-UV luminosity ratio of X-ray selected Type 1 AGN in XMM-COSMOS
• The Non-Linear Dependence of Flux on Black Hole Mass and Accretion Rate in Core Dominated Jets
• The New Generation Atlas of Quasar Spectral Energy Distributions from Radio to X-rays
• BAT AGN Spectroscopic Survey -- XII. The relation between coronal properties of Active Galactic Nuclei and the Eddington ratio
• Quasars as standard candles I: The physical relation between disc and coronal emission
• Magnetic flux captured by an accretion disk
• The large scale magnetic fields of advection dominated accretion flows
• The large scale magnetic fields of thin accretion disks
• X-ray and soft gamma-ray spectra of Broad-Line Radio Galaxies
• The $L_{\mathrm{x}}$-$L_{\mathrm{uv}}$-$L_{\mathrm{radio}}$ relation and corona-disk-jet connection in optically selected radio-loud quasars
• A Resolution Study of Magnetically Arrested Disks
• On the role of initial and boundary conditions in numerical simulations of accretion flows
• Thermal stability of thin disk with magnetically driven winds
• Interpreting the radio/X-ray correlation of black hole sources based on the accretion-jet model
• Angular Momentum Transport in Thin Magnetically Arrested Disks
• General Relativistic Radiation Magnetohydrodynamic Simulations of Thin Magnetically Arrested Disks
• Radiative Properties of Magnetically-Arrested Disks
• Comparison of hard X-ray spectra of luminous radio galaxies and their radio-quiet counterparts
• A systematic study of the condensation of the corona and the application for ${\Gamma }_{2-10keV}-L_{\mathrm{bol}}/L_{\mathrm{Edd}}$ correlation in luminous active galactic nuclei
• Evidence of the Dynamics of Relativistic Jet Launching in Quasars
• Comparison of SEDs of very massive radio-loud and radio-quiet AGN
• The Extreme Ultraviolet Deficit and Magnetically Arrested Accretion in Radio Loud Quasars
• The X-ray spectral and variability properties of typical radio-loud quasars
• Black Hole Fundamental Plane in Low-Excitation Radio Galaxies
• The composite X-ray spectra of radio-loud and radio-quiet SDSS quasars
• The composite X-ray spectrum of 3CRR Quasars
• The origin of X-ray emission in 3CRR sources: hints from mid-infrared Spitzer observations