SIMBAD references

2008MNRAS.385L.130N - Mon. Not. R. Astron. Soc., 385, L130-L134 (2008/March-3)

Spectral decomposition of starbursts and active galactic nuclei in 5-8 µm Spitzer-IRS spectra of local ultraluminous infrared galaxies.

NARDINI E., RISALITI G., SALVATI M., SANI E., IMANISHI M., MARCONI A. and MAIOLINO R.

Abstract (from CDS):

We present an analysis of the 5-8 µm Spitzer-IRS spectra of a sample of 68 local ultraluminous infrared galaxies (ULIRGs). Our diagnostic technique allows a clear separation of the active galactic nucleus (AGN) and starburst (SB) components in the observed mid-infrared emission, and a simple analytic model provides a quantitative estimate of the AGN/SB contribution to the bolometric luminosity. We show that AGN are ∼30 times brighter at 6 µm than SBs with the same bolometric luminosity, so that even faint AGN can be detected. Star formation events are confirmed as the dominant power source for extreme IR activity, since ∼85 per cent of ULIRG luminosity arises from the SB component. None the less an AGN is present in the majority (46/68) of our sources.

Abstract Copyright: 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): galaxies: active - galaxies: starburst - infrared: galaxies

Simbad objects: 67

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2021.03.06-00:28:27

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