SIMBAD references

2014MNRAS.445L..51T - Mon. Not. R. Astron. Soc., 445, L51-L55 (2014/November-3)

The dust masses of powerful radio galaxies: clues to the triggering of their activity.

TADHUNTER C., DICKEN D., MORGANTI R., KONYVES V., YSARD N., NESVADBA N. and RAMOS ALMEIDA C.

Abstract (from CDS):

We use deep Herschel Space Observatory observations of a 90 percent complete sample of 32 intermediate-redshift 2Jy radio galaxies (0.05 < z < 0.7) with strong emission lines to estimate the dust masses of their host galaxies and thereby investigate the triggering mechanisms for their quasar-like AGN. The dust masses derived for the radio galaxies (7.2x105 < Md < 2.6x108M) are intermediate between those of quiescent elliptical galaxies on the one hand, and ultraluminous infrared galaxies (ULIRGs) on the other. Consistent with simple models for the co-evolution of supermassive black holes and their host galaxies, these results suggest that most radio galaxies represent the late time re-triggering of AGN activity via mergers between the host giant elliptical galaxies and companion galaxies with relatively low gas masses. However, a minority of the radio galaxies in our sample ( ∼ 20 percent) have high, ULIRG-like dust masses, along with evidence for prodigious star formation activity. The latter objects are more likely to have been triggered in major, gas-rich mergers that represent a rapid growth phase for both their host galaxies and their supermassive black holes.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): galaxies:active - galaxies: interactions - galaxies: ISM - galaxies:jets - quasars: general

Simbad objects: 39

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2020.10.25-07:13:35

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