Observing Supermassive Black Holes across cosmic time: from phenomenology to physics

Abstract

In the last decade, a combination of high sensitivity, high spatial resolution observations and of coordinated multi-wavelength surveys has revolutionized our view of extra-galactic black hole (BH) astrophysics. We now know that supermassive black holes reside in the nuclei of almost every galaxy, grow over cosmological times by accreting matter, interact and merge with each other, and in the process liberate enormous amounts of energy that influence dramatically the evolution of the surrounding gas and stars, providing a powerful self-regulatory mechanism for galaxy formation. The different energetic phenomena associated to growing black holes and Active Galactic Nuclei (AGN), their cosmological evolution and the observational techniques used to unveil them, are the subject of this chapter. In particular, I will focus my attention on the connection between the theory of high-energy astrophysical processes giving rise to the observed emission in AGN, the observable imprints they leave at different wavelengths, and the methods used to uncover them in a statistically robust way. I will show how such a combined effort of theorists and observers have led us to unveil most of the SMBH growth over a large fraction of the age of the Universe, but that nagging uncertainties remain, preventing us from fully understating the exact role of black holes in the complex process of galaxy and large-scale structure formation, assembly and evolution.

46 pages, 21 figures. This review article appears as a chapter in the book: "Astrophysical Black Holes", Haardt, F., Gorini, V., Moschella, U and Treves A. (Eds), 2015, Springer International Publishing AG, Cham

References in corpus (24)

• An Observational Determination of the Bolometric Quasar Luminosity Function
• The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
• Toward the Standard Population Synthesis Model of the X-Ray Background: Evolution of X-Ray Luminosity and Absorption Functions of Active Galactic Nuclei Including Compton-Thick Populations
• The X-ray-to-Optical Properties of Optically-Selected Active Galaxies Over Wide Luminosity and Redshift Ranges
• Hot and cold gas accretion and feedback in radio-loud active galaxies
• X-ray spectral properties of AGN in the Chandra Deep Field South
• Absorption Properties and Evolution of Active Galactic Nuclei
• The XMM-Newton wide-field survey in the COSMOS field: I. Survey description
• A synthesis model for AGN evolution: supermassive black holes growth and feedback modes
• Occultation measurement of the size of the X-ray emitting region in the Active Galactic Nucleus of NGC 1365
• Measuring the kinetic power of AGN in the radio mode
• The innermost region of AGN tori: implications from the HST/NICMOS Type 1 point sources and near-IR reverberation
• Optical spectroscopy and X-ray detections of a sample of quasars and AGN selected in the mid-infrared from two Spitzer wide-area surveys
• The Evolution of Obscuration in AGN
• The characteristic blue spectra of accretion disks in quasars as uncovered in the infrared
• The metallicity of the most distant quasars
• Measuring the Fraction of Obscured Quasars by the Infrared Luminosity of Unobscured Quasars
• Parsec-scale dust distributions in Seyfert galaxies - Results of the MIDI AGN snapshot survey
• The Toroidal Obscuration of Active Galactic Nuclei
• Compton thick active galactic nuclei in Chandra surveys
• Molecular gas in QSO host galaxies at z>5
• The kinetic luminosity function and the jet production efficiency of growing black holes
• On the X-ray spectra of luminous, inhomogeneous accretion flows
• The high-redshift (z>3) AGN population in the 4 Ms Chandra Deep Field South

Cited by in corpus (21)

• Black holes, gravitational waves and fundamental physics: a roadmap
• Active Galactic Nuclei: what's in a name?
• The cosmic evolution of massive black holes in the Horizon-AGN simulation
• Cosmic microwave background bounds on primordial black holes including dark matter halo accretion
• The eROSITA Final Equatorial-Depth Survey (eFEDS): Identification and characterization of the counterparts to the point-like sources
• A Spectroscopic Survey of X-ray Selected AGN in the Northern XMM-XXL Field
• The near-to-mid infrared spectrum of quasars
• Inferences on the Relations Between Central Black Hole Mass and Total Galaxy Stellar Mass in the high-redshift Universe
• Black hole solutions in the quadratic Weyl conformal geometric theory of gravity
• The space density of z>4 blazars
• AGN spectral states from simultaneous UV and X-ray observations by XMM-Newton
• Spectral Evolution in High Redshift Quasars from the Final BOSS Sample
• Steep X-ray reflection emissivity profiles in AGN as the result of radially-structured disc ionisation
• The evolution of the heaviest super-massive black-holes in jetted AGNs
• The LOFAR-eFEDS survey: The incidence of radio and X-ray AGN and the disk-jet connection
• X-Ray Bright Active Galactic Nuclei in Local Dwarf Galaxies: Insights from eROSITA
• Probing supermassive black hole growth and its dependence on stellar mass and star-formation rate in low-redshift galaxies
• A lower limit to the accretion disc radius in the low-luminosity AGN NGC 1052 derived from high-angular resolution data
• The eROSITA Final Equatorial Depth Survey (eFEDS): SDSS spectroscopic observations of X-ray sources
• Deeper, Wider, Sharper: Next-Generation Ground-Based Gravitational-Wave Observations of Binary Black Holes
• Absorption cross-sections of small quasi-spherical black holes: the massless scalar case