How are AGN Found?

Details How are AGN Found? How are AGN Found?

2004-05-07

arxiv.org/abs/astro-ph/0405144v1

Astronomy and Astrophysics

Astrophysics

35 pages, 5 figures, to appear as Chapter 2 in "Supermassive Black Holes in the Distant Universe" (2004), ed. A. J. Barger, Kl

Scientific paper

We discuss the very different methods in each wavelength band for selecting and finding Active Galactic Nuclei (AGN). We briefly review the history of the different techniques for finding AGN and compare and contrast the advantages and difficulties of selection in different wavelength bands. We stress the strong selection effects in each wavelength band and the difficulty of defining complete samples. Of all the techniques presently used, we conclude that selection in the hard X-ray band via imaging and spectroscopy is the most complete and allows the best estimate of the number and evolution of active galaxies. However, all of the techniques have difficulties at low luminosities where emission due to stellar processes can have similar sizes and luminosities.

Affiliated with

Also associated with

No associations

Rating

How are AGN Found? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with How are AGN Found?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How are AGN Found? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-469813