2013A&A...559A..56L


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.14CEST04:35:37

2013A&A...559A..56L - Astronomy and Astrophysics, volume 559A, 56-56 (2013/11-1)

Probing AGN triggering mechanisms through the starburstiness of the host galaxies.

LAMASTRA A., MENCI N., FIORE F., SANTINI P., BONGIORNO A. and PICONCELLI E.

Abstract (from CDS):

We estimate the fraction of AGNs hosted in starburst galaxies (fbursty) as a function of the AGN luminosity predicted under the assumption that starburst events and AGN activity are triggered by galaxy interactions during their merging histories. The latter are described through Monte Carlo realizations, and are connected to star formation and BH accretion using a semi-analytic model of galaxy formation in a cosmological framework. The predicted fraction fbursty increases steeply with AGN luminosity from ≲0.2 at LX≲1044erg/s to >0.9 at LX>1045erg/s over a wide redshift interval from z≃0 to z≃6. We compare the model predictions with new measurements of fbursty from a sample of X-ray selected AGNs in the XMM-COSMOS field at 0.3<z<2, and from a sample of QSOs (LX>1045erg/s) in the redshift range 2<z<6.5. We find preliminary indications that under conservative assumptions half of the QSO hosts are starburst galaxies. This result provides motivation for future systematic studies of the stellar properties of high luminosity AGN hosts in order to constrain AGN triggering mechanisms.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: fundamental parameters - galaxies: interactions - galaxies: starburst

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2249 0
2 HS 1700+6416 QSO 17 01 00.6195618802 +64 12 09.118927057   16.39 16.17     ~ 347 0

    Equat.    Gal    SGal    Ecl

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2021.04.14-04:35:37

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