lec34 - Lecture 34 Active Galaxies Types Lecture 34 Purdue...

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Lecture 34 Active Galaxies: Types Purdue University, Astronomy 364 1 Lecture 34
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Reminder HW08 due NOW! HW09 has been posted. The final exam will be on May 3 at 1-3pm in Rm 203 (PHYS). Details have been posted on the course web page. The exam will cover Chapters 17-22. Issues of conflicts or special accommodations must be resolved by this Friday (April 22). No accommodation will be made after that. Lecture 32 Purdue University, Astronomy 364 2
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Lecture 34 Purdue University, Astronomy 364 3
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Non-Stellar Light In about 1-2% of bright galaxies, a large fraction of light originates from non-stellar sources. – Radio emission: highly non-thermal – IR emission: from heated dust – X-ray emission: from hot gas – Gamma-ray emission: from molecular clouds The non-stellar light tends to concentrate in a small but luminous central nucleus. – Active Galactic Nuclei (AGN) The spectrum of AGN has extremely strong emission lines.
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