The Discovery of Quasars (the first AGN found) Maartin Schmidt – the ‘discoverer of quasars’ Cyril Hazard – the REAL DEAL.
Post on 22-Dec-2015
216 Views
Preview:
Transcript
The Discovery of Quasars (the first AGN found)
Maartin Schmidt – the ‘discoverer of quasars’
Cyril Hazard – the REAL DEAL
The Cambridge Catalog of Radio Sources
A few hundred of the brightest radio sources were compiled with a radio interferometer at Cambridge, England.
Unfortunately, the positions were not accurately known. These were the brightest radio sources in the sky – with the exception of the Sun and planets…
The brightest was called 3C273.
Schmidt measured the spectrum:
Redshift of 0.13 indicating that the object is very far away (about 2.5 billion light years) and very bright!
Radio image of Cygnus A showing a small but very bright radio galaxy in the middle of the 320,000 ly wide lobes
This object
that looks like a star must be
enormously
luminous - its
redshift indicates
it is 4 billion light years
away!!
Jet
Narrow line region clouds
10 – 10000 ly
Broad Line Region
(Light months)
Accretion Disk (light days)
Dusty Molecular torus
10 – 1000 ly
Black Hole
100 million solar masses
Narrow line region clouds
10 – 10000 ly
Broad Line Region
(Light months)
Accretion Disk (light days)
Dusty Molecular torus
10 – 1000 ly
Black Hole
100 million solar masses
top related