Astronomia Extragalattica 2003 II part Lecture 1. Morphology continue

Extragalactic Astronomy Ac.Yr. 2003 - 2004

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Astronomia Extragalattica2003

II part Lecture 1. Morphology continue

Prof. Guido ChincariniOrdinario Milano Bicocca &

Emerito Osservatorio Astronomico di Brera


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M31


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NGC 4051

NGC 4151

NGC 1068


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NGC 7469

NGC 3565


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Markarian thumbnails


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3C

273


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The Dusty Torus

At about 100 light years from the singularity we detect a “Donut”composed of dust and gas, the donut is called the molecular torus.

A very similar feature has been detected by the Hubble Space Telescope in the Seyfert Galaxy NGC 4261.

The Torus is optically thick:

That is if located along the line of sight it absorbs the light coming from the internal regions and only the emission of the torus itself, mainly in the Infrared, and the emission coming from the outermost regions can be detected


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modello unificato, schema riassuntivo

IR Emission – The dusty torus

UV & Optical Emission – Accretion disk

Gamma & X ray Emission / Radio EmissionRelativistic jets

Optical Emission – NLR e BLR


25core of galaxy NGC4261


26 Markarian

421

–

broad

band

spect

Astronomia Extragalattica 2003 II part Lecture 1. Morphology continue

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