Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2012-03-08
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
3 pages, 2 figures, to appear in the Spectral Energy Distribution of Galaxies (SED2011) conference proceedings, Preston, UK, 2
Scientific paper
We conducted a Spitzer Space Telescope survey of 28 Luminous (11 < log(LIR/L_odot) < 12, LIRGs) and Ultra-Luminous Infrared Galaxies (log(LIR/L_odot) > 12, ULIRGs). Many of these galaxies are found in pairs or associations and are powered by either nuclear activity or starformation (Sanders & Mirabel 1996). Our main goal is to understand the relative importance of starbursts and AGNs in interacting systems. Is the frequency of AGN and starbursts in these interacting galaxies related to their luminosities? What is the importance of the merger stage and the frequency of AGNs? We present our conclusions and diagnostic diagrams based in the observed near infrared lines and compare to studies based solely in optical data.
Leão João Rodrigo S.
Leitherer Claus
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