Big and Young Supermassive Black Holes in the Early Universe

  title={Big and Young Supermassive Black Holes in the Early Universe},
  author={Tullia Sbarrato},
Blazars are active galactic nuclei characterized by relativistic jets launched in the vicinity of the central engine (i.e., a supermassive black hole), which are oriented close to our line of sight. Their peculiar orientation makes them very efficient tracers of the overall jetted population, and due to their brightness they can be visible up to very high redshifts. A deep knowledge of these objects can provide fundamental clues to the models of formation and growth of the first supermassive… Expand

Figures from this paper

A small radio galaxy at z = 4.026
1Department of Astronomy, Institute of Geography and Earth Sciences, ELTE Eötvös Loránd University, Budapest, Hungary 2Konkoly Observatory, ELKH Research Centre for Astronomy and Earth Sciences,Expand


The role of relativistic jets in the heaviest and most active supermassive black holes at high redshift
In powerful radio-quiet active galactic nuclei (AGN), black holes heavier than one billion solar masses form at a redshift ~1.5-2. Supermassive black holes in jetted radio-loud AGN seems to formExpand
Chasing the heaviest black holes of jetted active galactic nuclei
We investigate the physical properties of 10 blazars at redshift greater than 2 detected in the 3-yr all-sky survey performed by the Burst Alert Telescope (BAT) on board the Swift satellite. We findExpand
Blazar candidates beyond redshift 4 observed with GROND
The search for extremely massive high-redshift blazars is essential to put strong constraints on the supermassive black hole formation theories. Up to now, the few blazars known to have a redshiftExpand
Gamma-Ray Blazars within the First 2 Billion Years
The detection of high-redshift ($z\,\gt 3$) blazars enables the study of the evolution of the most luminous relativistic jets over cosmic time. More importantly, high-redshift blazars tend to hostExpand
Dark bubbles around high-redshift radio-loud active galactic nucleus
At redshift larger than 3 there is a disagreement between the number of blazars (whose jet is pointing at us) and the number of expected parents (whose jet is pointing elsewhere). Now we strengthenExpand
VLBI observations of four radio quasars at z > 4: blazars or not?
Blazars are active galactic nuclei (AGN) whose relativistic jets point nearly to the line of sight. Their compact radio structure can be imaged with very long baseline interferometry (VLBI) on parsecExpand
A luminous quasar at a redshift of z = 7.085
Observations of a quasar at a redshift of 7.3 are reported, suggesting that the neutral fraction of the intergalactic medium in front of ULAS J1120+0641 exceeded 0.1. Expand
Efficient Generation of Jets from Magnetically Arrested Accretion on a Rapidly Spinning Black Hole
We describe global, 3D, time-dependent, non-radiative, general-relativistic, magnetohydrodynamic simulations of accreting black holes (BHs). The simulations are designed to transport a large amountExpand
Radio-loud active galactic nuclei at high redshifts and the cosmic microwave background
The interaction between the emitting electrons and the Cosmic Microwave Background (CMB) affects the observable properties of radio‐loud Active Galactic Nuclei (AGN) at early epochs. At highExpand
Active galactic nuclei: what’s in a name?
Active galactic nuclei (AGN) are energetic astrophysical sources powered by accretion onto supermassive black holes in galaxies, and present unique observational signatures that cover the fullExpand