7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

Spectral comparison between AGN at z = 0.1, 0.2 and 0.3

8 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: D1.1
Poster Presentation Track D1 - Astrophysics Poster1


Prof. Hartmut Winkler (Dept. Physics, University of Johannesburg)

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We identified three samples of ROSAT sources with Sloan Digital Sky Survey spectra, one at redshift z = 0.1, a second one at z = 0.2 and a third one at z = 0.3. 822 sources in total were examined. We determined the nature and spectral sub-types of the sources by visual inspection. The fraction of each sub-type at each of the three redshifts are then calculated. We consider selection biases caused by the luminosity cut-off threshold to determine whether any systematic trends in AGN type are evident with increasing redshift. We hence probe if an evolution effect is detected in our sample.

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Primary authors

Prof. Hartmut Winkler (Dept. Physics, University of Johannesburg) Ms Jessica Tsuen (Dept. Physics, University of Johannesburg)

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