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astro-ph.CO2010★ 620 cited
A comprehensive classification of galaxies in the SDSS: How to tell true from fake AGN?
R. Cid Fernandes, G. Stasinska, A. Mateus +1
We use the W_Ha versus [NII]/Ha (WHAN) diagram to provide a comprehensive emission-line classification of SDSS galaxies. This classification is able to cope with the large populati…
astro-ph.CO2010
Beware of fake AGNs
G. Stasinska, N. Vale Asari, R. Cid Fernandes
In the BPT diagram, the distribution of the emission-line galaxies from the Sloan Digital Sky Survey (SDSS) evokes the wings of a seagull. Traditionally, galaxies in the right wing…