TY - CONF
T1 - Co-evolution of black hole growth and star formation activity in local luminous infrared galaxies
AU - Alonso-Herrero, A.
AU - Pereira-Santaella, M.
AU - Rieke, G. H.
AU - Rigopoulou, D.
AU - Diamond-Stanic, A. M.
AU - Hernán-Caballero, A.
AU - Wang, Y.
N1 - Funding Information:
A.A.-H. and M.P.-S. acknowledge support from the Spanish Plan Nacional de Astronomía y Astrofísica under grant AYA2009-05705-E. A.A.-H. and A.H.-C. are also funded by the Universidad de Cantabria through the Augusto González Linares Program. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under NASA contract 1407. M.P.-S. isfunded by an ASI fellowship under contract I/005/11/0.
Funding Information:
A.A.-H. and M.P.-S. acknowledge support from the Spanish Plan Nacional de Astronom?a y Astrof?sica under grant AYA2009-05705-E. A.A.-H. and A.H.-C. are also funded by the Universidad de Cantabria through the Augusto Gonz?lez Linares Program. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under NASA contract 1407. M.P.-S. isfunded by an ASI fellowship under contract I/005/11/0.
Publisher Copyright:
© 2020 Proceedings of the 10th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VII, SEA 2012. All rights reserved.
PY - 2012/7/9
Y1 - 2012/7/9
N2 - We use Spitzer spectroscopic and imaging observations to study the co-evolution of black hole (BH) growth and star formation (SF) activity in a complete volume-limited sample of local Luminous Infrared Galaxies (LIRGs). Using a mid-infrared (mid-IR) spectral decomposition method we identify active galactic nuclei (AGN) with Seyfert-like luminosities and relatively small bolometric contributions (median ∼ 5%) in half of the LIRG nuclei. Combining mid-IR and AGN optical detections we obtain a 62% AGN detection rate in local LIRGs. We combine gas velocity dispersions of spectrally resolved [Ne iii]15.56 µm and [O iii]λ5007Å lines and literature stellar velocity dispersions , and we obtain typical BH masses of 3 ×107 M☉ for local LIRGs. We find that the ratios of nuclear and integrated SF rates (SFR) to BH accretion rates are higher in local LIRGs than in optically selected Seyferts. We interpret our results in a scenario where local LIRGs with an AGN represent an early phase of the (possibly episodic) growth of BHs in massive spiral galaxies with high SFR, not necessarily associated with a major merger event.
AB - We use Spitzer spectroscopic and imaging observations to study the co-evolution of black hole (BH) growth and star formation (SF) activity in a complete volume-limited sample of local Luminous Infrared Galaxies (LIRGs). Using a mid-infrared (mid-IR) spectral decomposition method we identify active galactic nuclei (AGN) with Seyfert-like luminosities and relatively small bolometric contributions (median ∼ 5%) in half of the LIRG nuclei. Combining mid-IR and AGN optical detections we obtain a 62% AGN detection rate in local LIRGs. We combine gas velocity dispersions of spectrally resolved [Ne iii]15.56 µm and [O iii]λ5007Å lines and literature stellar velocity dispersions , and we obtain typical BH masses of 3 ×107 M☉ for local LIRGs. We find that the ratios of nuclear and integrated SF rates (SFR) to BH accretion rates are higher in local LIRGs than in optically selected Seyferts. We interpret our results in a scenario where local LIRGs with an AGN represent an early phase of the (possibly episodic) growth of BHs in massive spiral galaxies with high SFR, not necessarily associated with a major merger event.
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M3 - Paper
AN - SCOPUS:85087549898
SP - 103
EP - 114
T2 - 10th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics VII, SEA 2012
Y2 - 9 July 2012 through 13 July 2012
ER -