An upper limit to the central density of dark matter haloes from consistency with the presence of massive central black holes

  title={An upper limit to the central density of dark matter haloes from consistency with the presence of massive central black holes},
  author={Xavier Hern{\'a}ndez and William H. Lee},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
We study the growth rates of massive black holes in the centres of galaxies from accretion of dark matter from their surrounding haloes. By considering only the accretion due to dark matter particles on orbits unbound to the central black hole, we obtain a firm lower limit to the resulting accretion rate. We find that a runaway accretion regime occurs on a timescale which depends on the three characteristic parameters of the problem: the initial mass of the black hole, and the volume density… Expand

Figures from this paper

Dark matter concentrations in galactic nuclei according to polytropic models
We calculate the radial profiles of galaxies where the nuclear region is self-gravitating, consisting of self-interacting dark matter (SIDM) with F degrees of freedom. For sufficiently high densityExpand
Horizon growth of supermassive black hole seeds fed with collisional dark matter
We present the accretion of collisional dark matter on a supermassive black hole seed. The analysis is based on the numerical solution of the fully coupled system of Einstein-Euler equations forExpand
Collisional density profiles of dark matter around supermassive black holes
We solve the spherically symmetric time-dependent relativistic Euler equations on a Schwarzschild background space–time for a perfect fluid, where the perfect fluid models the dark matter and theExpand
Quantum Cosmology Explains the General Galaxy-Black Hole Correlation
The symmetric quantum physics of the Universe demonstrates that the massive black holes developing in the post-inflation big-bang prompt the formation of the host galaxies around them. A generalExpand
Collisional dark matter density profiles around supermassive black holes
We solve the spherically symmetric time dependent relativistic Euler equations on a Schwarzschild background space-time for a perfect fluid, where the perfect fluid models the dark matter and theExpand
Dark atoms and the positron-annihilation-line excess in the galactic bulge
It was recently proposed that stable particles of charge −2, , can exist and constitute dark matter after they bind with primordial helium in O-helium (OHe) atoms. We study here in detail theExpand
Scalar field dark matter: behavior around black holes
We present the numerical evolution of a massive test scalar fields around a Schwarzschild space-time. We proceed by using hyperboloidal slices that approach future null infinity, which is theExpand
Some astrophysical and cosmological findings from TGD point of view
There are five rather recent findings not easy to understand in the framework of standard astrophysics and cosmology. The first finding is that the model for the absorption of dark matter byExpand
Unveiling Gargantua: A new search strategy for the most massive central cluster black holes
We aim to unveil the most massive central cluster black holes in the universe. We present a new search strategy which is based on a black hole mass gain sensitive 'calorimeter' and which links theExpand
Dark atoms with nuclear shell: A status review
Among dark atom scenarios, the simplest and most predictive one is that of O-helium (OHe) dark atoms, in which a leptonlike doubly charged particle O–– is bound to a primordial helium nucleus, and isExpand


Feeding black holes at galactic centres by capture from isothermal cusps
Abstract The capture rates of stars and dark particles onto supermassive black holes depend strongly on the spatial and kinematical distribution of the stellar and dark matter at the centre of bulgesExpand
Evidence of self-interacting cold dark matter from galactic to galaxy cluster scales
Within the framework of the cold dark matter (CDM) cosmogony, a central cusp in the density profiles of virialized dark haloes is predicted. This prediction disagrees with the soft inner halo massExpand
Limits on Collisional Dark Matter from Elliptical Galaxies in Clusters
The dynamical evolution of galaxies in clusters would be modified if dark matter were self-interacting. Heat conduction from the hot cluster halo would lead to evaporation of the relatively coolerExpand
Direct Cosmological Simulations of the Growth of Black Holes and Galaxies
We investigate the coupled formation and evolution of galaxies and their embedded supermassive black holes using state-of-the-art hydrodynamic simulations of cosmological structure formation. For theExpand
We model the dynamical structure of M87 (NGC4486) using high spatial resolution long-slit observations of stellar light in the central regions, two-dimensional stellar light kinematics out to half ofExpand
The formation of galaxy stellar cores by the hierarchical merging of supermassive black holes
We investigate a hierarchical structure formation scenario in which galaxy stellar cores are created from the binding energy liberated by shrinking supermassive black hole (SMBH) binaries. The binaryExpand
The tightening of wide binaries in dSph galaxies through dynamical friction as a test of the dark matter hypothesis
We estimate the time-scales for orbital decay of wide binaries embedded within dark matter haloes, due to dynamical friction against the dark matter particles. We derive analytical scalings for thisExpand
Observational constraints on growth of massive black holes
We study the observational constraints on the growth of massive black holes (BHs) in galactic nuclei. We use the velocity dispersions of early-type galaxies obtained by the Sloan Digital Sky SurveyExpand
Dark Matter Properties and Halo Central Densities
Using an analytic model calibrated against numerical simulations, we calculate the central densities of dark matter halos in a "conventional" cold dark matter model with a cosmological constantExpand
The dynamical structure of dark matter haloes
Thanks to the ever increasing computational power and the development of more sophisticated algorithms, numerical N-body simulations are now uncovering several phenomenological relations between theExpand