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Star formation and AGN activity in the most luminous LINERs in the local universe

AuthorsPović, Mirjana; Márquez, Isabel ; Netzer, Hagai; Masegosa, Josefa ; Nordon, Raanan; Pérez Jiménez, Enrique ; Schoenell, William
KeywordsGalaxies: active
Galaxies: nuclei
Galaxies: star formation
Issue Date28-Jul-2016
PublisherOxford University Press
CitationMonthly Notices of the Royal Astronomical Society 462(3): 2878-2903 (2016)
AbstractThis work presents the properties of 42 objects in the group of the most luminous, highest star formation rate (SFR) low-ionization nuclear emission-line regions (LINERs) at z = 0.04-0.11. We obtained long-slit spectroscopy of the nuclear regions for all sources, and FIR data (Herschel and IRAS) for 13 of them. We measured emission-line intensities, extinction, stellar populations, stellarmasses, ages, active galactic nuclei (AGN) luminosities, and SFRs. We find considerable differences from other low-redshift LINERs, in terms of extinction, and general similarity to star-forming galaxies. We confirm the existence of such luminous LINERs in the local universe, after being previously detected at z ~0.3 by Tommasin et al. Themedian stellar mass of these LINERs corresponds to 6-7 × 1010 M⊙ which was found in previous work to correspond to the peak of relative growth rate of stellar populations and therefore for the highest SFRs. Other LINERs although showing similar AGN luminosities have lower SFR. We find that most of these sources have LAGN ~ LSF suggesting co-evolution of black hole and stellarmass. In general, the fraction of local LINERs on themain sequence of star-forming galaxies is related to their AGN luminosity. © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
Publisher version (URL)http://dx.doi.org/10.1093/mnras/stw1842
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