Outflow-Dominated Emission from the Quiescent Massive Black Holes in NGC 4621 and NGC 4697
arXiv:0712.1308 · doi:10.1086/527542
Abstract
The nearby elliptical galaxies NGC 4621 and NGC 4697 each host a supermassive black hole with a mass more than 1e8 Solar masses. Analysis of archival Chandra data and new NRAO Very Large Array data shows that each galaxy contains a low-luminosity active galactic nucleus (LLAGN), identified as a faint, hard X-ray source that is astrometrically coincident with a faint 8.5-GHz source. The latter has a diameter less than 0.3 arcsec (26 pc for NGC 4621, 17 pc for NGC 4697). The black holes energizing these LLAGNs have Eddington ratios L(2-10 keV) / L(Edd) ~ 1e-9, placing them in the so-called quiescent regime. The emission from these quiescent black holes is radio-loud, with log Rx = log nuLnu(8.5 GHz) / L(2-10 keV) ~ -2, suggesting the presence of a radio outflow. Also, application of the radio-X-ray-mass relation from Yuan & Cui for quiescent black holes predicts the observed radio luminosities nuLnu(8.5 GHz) to within a factor of a few. Significantly, that relation invokes X-ray emission from the outflow rather than from an accretion flow. The faint, but detectable, emission from these two massive black holes is therefore consistent with being outflow-dominated. Observational tests of this finding are suggested.
arXiv comment11 pages; 4 figures: emulateapj; to appear in ApJ
References in corpus (33)
- Star Formation in Galaxies Along the Hubble Sequence
- The slope of the black-hole mass versus velocity dispersion correlation
- A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies
- A fundamental plane of black hole activity
- Radio Properties of Infrared Selected Galaxies in the IRAS 2 Jy Sample
- A Scheme to Unify Low-Power Accreting Black Holes - Jet-Dominated Accretion Flows and the Radio/X-Ray Correlation
- Chandra Snapshot Observations of Low-Luminosity AGNs with a Compact Radio Source
- The Association of Jet Production with Geometrically Thick Accretion Flows and Black Hole Rotation
- Radio Sources in Low-Luminosity Active Galactic Nuclei.IV. Radio Luminosity Function, Importance of Jet Power, and Radio Properties of the Complete Palomar Sample
- Extracting energy from black holes: the relative importance of the Blandford-Znajek mechanism
- A Jet-ADAF model for Sgr A*
- Jet-dominated states: an alternative to advection across black hole event horizons in `quiescent' X-ray binaries
- Detection of Nuclear X-ray Sources in Nearby Galaxies with Chandra
- An Accretion-Jet Model for Black Hole Binaries: Interpreting the Spectral and Timing Features of XTE J1118+480
- Chandra X-ray Observations of the X-ray Faint Elliptical Galaxy NGC 4697
- A Search for "Dwarf" Seyfert Nuclei. VI. Properties of Emission-Line Nuclei in Nearby Galaxies
- Radio--X-ray Correlation and the "Quiescent State" of Black Hole Sources
- Nuclear Accretion in Galaxies of the Local Universe: Clues from Chandra Observations
- Kinematics of Ten Early-Type Galaxies from HST and Ground-Based Spectroscopy
- A Stationary Core with a One-sided Jet in the Center of M81
- Nuclear Cusps and Cores in Early-type Galaxies As Relics of Binary Black Hole Mergers
- NGC4258: a jet-dominated low-luminosity AGN?
- Constraints on the role of synchrotron X-rays from jets of accreting black holes
- Accretion and nuclear activity of quiescent supermassive black holes. I: X-ray study
- Accretion and nuclear activity of quiescent supermassive black holes. II: optical study and interpretation
- The Location of the Core in M81
- Detection of the "Active" Nucleus of M32
- The Size of the Radio-Emitting Region in Low-luminosity Active Galactic Nuclei
- Sgr A* in context: daily flares as a probe of the fundamental X-ray emission process in accreting black holes
- HST observations of nuclear stellar disks
- A 60 pc counter-rotating core in NGC 4621
- Relation between dust and radio luminosity in optically selected early type galaxies
- Accretion Rates onto Massive Black Holes in Four Quiescent Elliptical Galaxies
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- Radiatively Inefficient Accretion in Nearby Galaxies
- Feedback from central black holes in elliptical galaxies. I: models with either radiative or mechanical feedback but not both
- Correlation between the photon index and X-ray luminosity of black hole X-ray binaries and active galactic nuclei: observations and interpretation
- Revisiting the "Fundamental Plane" of Black Hole Activity at Extremely Low Luminosities
- A census of X-ray nuclear activity in nearby galaxies
- WISDOM Project - II: Molecular gas measurement of the supermassive black hole mass in NGC4697
- A Physical Link Between Jet Formation and Hot Plasma in Active Galactic Nuclei
- Cold gas in group-dominant elliptical galaxies
- Interpreting the radio/X-ray correlation of black hole sources based on the accretion-jet model
- AGN feedback in elliptical galaxies: numerical simulations
- Fundamental Plane of Black Hole Activity in Quiescent Regime
- Origin of X-ray Emission from Transient Black Hole Candidates in Quiescence
- Exploring the accretion model of M87 and 3C 84 with the Faraday rotation measure observations
- Jet-dominated quiescent states in black hole X-ray binaries: the case of V404 Cyg
- Relationship Between the Kinetic Power and Bolometric Luminosity of Jets: limitation from black hole X-ray binaries, active galactic nuclei, and gamma-ray bursts
- Jet-dominated quiescent state in black hole X-ray binaries: the cases of A0620--00 and XTE J1118+480
- Modeling the Spectrum of IGR J17177-3656
- Cosmic quenching and scaling laws for the evolution of supermassive black holes and host galaxies