Jet-accretion system in the nearby mJy Radio Galaxies

Abstract

It is generally thought that FRII Radio Galaxies host thin optically thick disks, while FRIs are powered by Advected Dominated Accretion Flows. The sources with an efficient engine are optically classified as High Excitation Radio Galaxies (HERGs) and those with an inefficient motor as Low Excitation Radio Galaxies (LERGs). Recently, the study of Radio Galaxies down to mJy fluxes has cast serious doubts on the LERG-FRI and HERG-FRII correspondence, revealing that many LERGs show FRII radio morphologies. The FR catalogs recently compiled by Capetti et al. (2017a,b) and Baldi et al. (2018) have allowed us to explore this issue in the local ($z\le 0.15$) mJy Universe. Our statistical study shows that the majority of nearby mJy objects are in a late stage of their life. FRII-LERGs appear more similar to the old FRI-LERGs than to the young FRII-HERGs. FRII-LERGs may be aged HERGs that, exhausted the cold fuel, have changed their accretion regime or a separate LERG class particularly efficient in launching jets. Exploiting the empirical relations which convert L${}_{[\mathrm{OIII}]}$ and L${}_{1.4\mathrm{GHz}}$ into accretion power and jet kinetic power, respectively, we observed that LERGs with similar masses and accretion rates seem to expel jets of different power. We speculate that intrinsic differences related to the black hole properties (spin and magnetic field at its horizon) can determine the observed spread in jet luminosity. In this view, FRII-LERGs should have the fastest spinning black holes and/or the most intense magnetic fluxes. On the contrary, compact LERGs (i.e. FR0s) should host extremely slow black holes and/or weak magnetic fields.

arXiv comment16 pages, 5 figures. Accepted for publication in ApJ

References in corpus (53)

• Stellar population synthesis at the resolution of 2003
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Planck 2013 results. XVI. Cosmological parameters
• The Demography of Massive Dark Objects in Galaxy Centres
• The Host Galaxies and Classification of Active Galactic Nuclei
• Hot Accretion Flows Around Black Holes
• On the Fate of Gas Accreting at a Low Rate onto a Black Hole
• Heating Hot Atmospheres with Active Galactic Nuclei
• Revisiting the Scaling Relations of Black Hole Masses and Host Galaxy Properties
• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• Differential Galaxy Evolution in Cluster and Field Galaxies at z=0.3
• Present-Day Growth of Black Holes and Bulges: the SDSS Perspective
• On the fundamental dichotomy in the local radio-AGN population: accretion, evolution, and host galaxy properties
• Alternative diagnostic diagrams and the "forgotten" population of weak line galaxies in the SDSS
• The emission line - radio correlation for radio sources using the 7C Redshift Survey
• A relationship between AGN jet power and radio power
• The power of relativistic jets is larger than the luminosity of their accretion disks
• A 20cm VLA Survey of Abell Clusters of Galaxies VI. Radio/Optical Luminosity Functions
• Radiative Efficiency and Content of Extragalactic Radio Sources: Toward a Universal Scaling Relation Between Jet Power and Radio Power
• An optical spectroscopic survey of the 3CR sample of radio galaxies with z<0.3. II. Spectroscopic classes and accretion modes in radio-loud AGN
• Measuring the kinetic power of AGN in the radio mode
• Revisiting the Fanaroff-Riley dichotomy and radio-galaxy morphology with the LOFAR Two-Metre Sky Survey (LoTSS)
• Revisiting the Hubble sequence in the SDSS DR7 spectroscopic sample: a publicly available bayesian automated classification
• Energy, momentum and mass outflows and feedback from thick accretion discs around rotating black holes
• The dividing line between FR I and FR II radio--galaxies
• The Radiative Efficiency of Hot Accretion Flows
• Ultra-fast outflows in radio-loud active galactic nuclei
• Radio AGN in the local universe: unification, triggering and evolution
• Merging groups and clusters of galaxies from the SDSS data. The catalogue of groups and potentially merging systems
• An XMM-Newton study of the environments, particle content and impact of low-power radio galaxies
• Bardeen-Petterson Alignment, Jets and Magnetic Truncation in GRMHD Simulations of Tilted Thin Accretion Discs
• Particle content, radio-galaxy morphology and jet power: all radio-loud AGN are not equal
• A Transition in the Accretion Properties of Radio-Loud Active Nuclei
• FRII{\sl{CAT}}: A FIRST catalog of FR~II radio galaxies
• FR0CAT: a FIRST catalog of FR0 radio galaxies
• The relation between morphology, accretion modes and environmental factors in local radio AGN
• FRICAT: A FIRST catalog of FRI radio galaxies
• A representative survey of the dynamics and energetics of FRII radio galaxies
• The nuclear properties and extended morphologies of powerful radio galaxies: the roles of host galaxy and environment
• Evidence for radio-source heating of groups
• The nature of the optical---radio correlations for powerful radio galaxies
• Jet collimation in NGC 315 and other nearby AGN
• Hybrid morphology radio sources from FIRST survey
• The Relationship Between Beam Power and Radio Power for Classical Double Radio Sources
• The Optical-Radio Mapping: the kinetic efficiency of Radio-Loud AGNs
• Relation between winds and jets in radio-loud AGN
• Radio morphology-accretion mode link in FRII low-excitation radio galaxies
• FR0 radio galaxies and their place in the radio morphology classification
• Warm Absorber Energetics in Broad Line Radio Galaxies
• Deciphering the large-scale environment of radio galaxies in the local Universe: where do they born, grow and die?
• Triggering mixing and deceleration in FRI jets: a solution
• The large-scale environment of FR 0 radio galaxies
• A Chandra study of Abell 795 -- a sloshing cluster with a FR0 radio galaxy at its center

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• Do Radio Active Galactic Nuclei Reflect X-ray Binary Spectral States?
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• VLA Snapshot Continuum Survey of FRI Quasar Candidates Selected from the LOFAR Two-Metre Sky Survey (LoTSS)
• The Accretion Properties and Jet Mechanisms for the Low-Excitation Radio Galaxies
• Linking {\it Fermi} blazars and radio galaxies through accretion and jet radiation mechanisms
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