Black Holes, Galaxy Formation, and the MBH-σ Relation

  title={Black Holes, Galaxy Formation, and the MBH-$\sigma$ Relation},
  author={Andrew R. King},
  journal={The Astrophysical Journal},
  • A. King
  • Published 2003
  • Physics, Computer Science
  • The Astrophysical Journal
Recent X-ray observations of intense high-speed outflows in quasars suggest that supercritical accretion on to the central black hole may have an important effect on a host galaxy. I revisit some ideas of Silk & Rees and assume that such flows occur in the final stages of building up the black hole mass. It is now possible to model explicitly the interaction between the outflow and the host galaxy. This is found to resemble a momentum-driven stellar wind bubble, implying a relation MBH = (fgκ/2… Expand
Black hole feedback in the luminous quasar PDS 456
A signature in x-ray spectra of a strong persistent outflow in the quasar PDS 456 is seen, estimating a broad solid angle spanned by the wind that enables a far greater impact on the host galaxy than narrower jet outflows. Expand
A 10,000-solar-mass black hole in the nucleus of a bulgeless dwarf galaxy
The motions of gas and stars in the nuclei of nearby galaxies have demonstrated that massive black holes are common1 and that their masses correlate with the stellar velocity dispersion σ★ of theExpand
Accretion and Outflow in Active Galaxies
  • A. King
  • Physics
  • Proceedings of the International Astronomical Union
  • 2009
Abstract I review accretion and outflow in active galactic nuclei. Accreti4on appears to occur in a series of very small-scale, chaotic events, whose gas flows have no correlation with theExpand
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It is concluded that supermassive black holes (SMBH) should on average spin moderately, with the mean value a decreasing slowly as the mass increases; SMBH coalescences leave little long-term effect on a; rare examples of massive holes with larger spin parameters could result from prograde coalescence withSMBHs of similar mass, and are most likely to be found in giant ellipticals. Expand
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Black Hole Outflows
I show that Eddington accretion episodes in active galactic nuclei (AGN) are likely to produce winds with velocities υ ~ 0.1c and ionization parameters up to ξ ~ 10 4 (cgs), implying the presence ofExpand
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We discuss the importance of feedback via photoionization and Compton heating on the co-evolution of massive black holes (MBHs) at the centre of spheroidal galaxies, and their stellar and gaseousExpand
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Simulations that simultaneously follow star formation and the growth of black holes during galaxy–galaxy collisions find that, in addition to generating a burst of star formation, a merger leads to strong inflows that feed gas to the supermassive black hole and thereby power the quasar. Expand
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We present a study of relations between the masses of the central supermassive black holes (SMBHs) and the atmospheric gas temperatures and luminosities measured within a range of radii between ReExpand


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We describe a correlation between the mass Mbh of a galaxy's central black hole and the luminosity-weighted line-of-sight velocity dispersion σe within the half-light radius. The result is based on aExpand
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Most elliptical galaxies contain central black holes (BHs), and most also contain significant amounts of hot gas capable of accreting on to the central BH as a result of having cooling times that areExpand
Cooling Flows and Quasars: Different Aspects of the Same Phenomenon? I. Concepts
We present a new class of solutions for the gas flows in elliptical galaxies containing massive central black holes (BHs). Modified King model galaxies are assumed. Two source terms operate: massExpand
Observations of nearby galaxies reveal a strong correlation between the mass of the central dark object MBH and the velocity dispersionof the host galaxy, of the form logðMBH=M� Þ¼ � þ � logð�=� 0Þ;Expand
A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
The masses of supermassive black holes correlate almost perfectly with the velocity dispersions of their host bulges, Mbh ∝ σα, where α = 4.8 ± 0.5. The relation is much tighter than the relationExpand
The Demography of massive dark objects in galaxy centers
We construct dynamical models for a sample of 36 nearby galaxies with Hubble Space Telescope (HST) photometry and ground-based kinematics. The models assume that each galaxy is axisymmetric, with aExpand
Collisional dark matter and the origin of massive black holes
  • Ostriker
  • Physics, Medicine
  • Physical review letters
  • 2000
If the cosmological dark matter is primarily in the form of an elementary particle which has mass m(p) and cross section for self-interaction sigma, then seed black holes will grow in a Hubble time t(H) due to accretion of the dark matter to a mass, which produces massive black holes in the (10(6)-10(9) range observed. Expand