Local Luminous Infrared Galaxies. III. Co-evolution of Black Hole Growth and Star Formation Activity?
- Alonso-Herrero, A
- Pereira-Santaella, M
- Rieke, GH
- Diamond-Stanic, AM
- Wang, Y
- Hernan-Caballero, A
- Rigopoulou, D
DOIAbstract
Local luminous infrared (IR) galaxies (LIRGs) have both high star formation rates (SFR) and a high AGN (Seyfert and AGN/starburst composite) incidence. Therefore, they are ideal candidates to explore the co-evolution of black hole (BH) growth and star formation (SF) activity, not necessarily associated with major mergers. Here, we use Spitzer/IRS spectroscopy of a complete volume-limited sample of local LIRGs (distances of <78Mpc). We estimate typical BH masses of 3x10^7 M_sun using [NeIII]15.56micron and optical [OIII]5007A gas velocity dispersions and literature stellar velocity dispersions. We find that in a large fraction of local LIRGs the current SFR is taking place not only in the inner nuclear ~1.5kpc region, as estimated from the n...
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