PX269 Galaxies

PX269 Galaxies

Part 5: Galactic nuclei

5.1 Active galaxies

Seyfert galaxies

NGC 5548 (Seyfert galaxy) NGC 3277 (normal galaxy)

PX269 Galaxies

Typical galaxy spectrum (optical)

PX269 Galaxies

Optical spectra of Seyfert nuclei

Type 1(broad allowed lines)

Type 2 (narrow lines)

XMM-Newton X-ray telescope

X-ray spectra of active galaxies

Type 1

Type 1

Type 2

Type 2

PX269 GalaxiesBroadband energy spectrum

X-rays

Rapid Variability

PX269 Galaxies

PX269 Galaxies

76m Lovell Radio Telescope

Radio image of Cygnus A (a radio galaxy)

Combined optical and radio images of Cen A

Optical jet in M87

a nearby gE galaxy

HST

HST image of the quasar 3C 273

X-ray jet from the quasar 3C 273

Optical spectra of active galaxies

Unified Model

PX269 Galaxies

Unified Model

PX269 Galaxies

PX269 Galaxies

PX269 Galaxies

Crucial evidence supporting unified modelTotal flux

Polarised flux

Type 2 spectrum

Type 1 spectrum

NGC1068

PX269 Galaxies

Transition between Type 1 and 2 in a single object

1984: Type 2

1974: Type 1

PX269 Galaxies

Part 5: Galactic nuclei

5.2 Super-massive black holes in normal galaxies

PX269 Galaxies

Kormendy 1988

Evidence for a super-massive black hole at the nucleus of M31

Hubble Space Telescope

Very Large Telescope (VLT)

European Southern Observatory (ESO) in Chile

PX269 Galaxies

Schoedel et al 2002, Nature 419, 694

PX269 Galaxies

Schoedel et al 2002, Nature 419, 694

PX269 GalaxiesSchoedel et al 2002, Nature 419, 694

PX269 GalaxiesSchoedel et al 2002, Nature 419, 694

PX269 Galaxies

PX269 Galaxies

The M-Sigma relation

Tremaine et al 2002, ApJ 574, 740

PX269 Galaxies

Kormendy 1988

Evidence for a super-massive black hole at the nucleus of M31