PX269 Galaxies Part 4: Galactic nuclei 4.1 Active galaxies.

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Presentation transcript:

PX269 Galaxies Part 4: Galactic nuclei 4.1 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 2

PX269 Galaxies Broadband energy spectrum X-rays

Rapid Variability

PX269 Galaxies

76m Lovell Radio Telescope

Combined optical and radio images of Cen A

Radio image of Cygnus A (a radio galaxy)

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

Crucial evidence supporting unified model Total flux Polarised flux Type 2 spectrum Type 1 spectrum NGC1068

PX269 Galaxies Transition between Type 1 and 2 in a single object 1984: Type : Type 1

PX269 Galaxies Part 4: Galactic nuclei 4.2 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 Galaxies Schoedel et al 2002, Nature 419, 694

PX269 Galaxies Schoedel et al 2002, Nature 419, 694

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