2016A&A...593A.109D


Query : 2016A&A...593A.109D

2016A&A...593A.109D - Astronomy and Astrophysics, volume 593A, 109-109 (2016/9-1)

Disentangling star formation and AGN activity in powerful infrared luminous radio galaxies at 1 <z < 4.

DROUART G., ROCCA-VOLMERANGE B., DE BREUCK C., FIOC M., LEHNERT M., SEYMOUR N., STERN D. and VERNET J.

Abstract (from CDS):

High-redshift radio galaxies present signs of both star formation and AGN activity, making them ideal candidates to investigate the connection and coevolution of AGN and star formation in the progenitors of present-day massive galaxies. We make use of a sample of 11 powerful radio galaxies spanning 1<z<4 which have complete coverage of their spectral energy distribution (SED) from UV to FIR wavelengths. Using Herschel data, we disentangle the relative contribution of the AGN and star formation by combining the galaxy evolution code PEGASE.3 with an AGN torus model. We find that three components are necessary to reproduce the observed SEDs: an evolved and massive stellar component, a submm bright young starburst, and an AGN torus. We find that powerful radio galaxies form at very high-redshift, but experience episodic and important growth at 1<z<4 as the mass of the associated starburst varies from 5 to 50% of the total mass of the system. The properties of star formation differ from source to source, indicating no general trend of the star formation properties in the most infrared luminous high-redshift radio galaxies and no correlation with the AGN bolometric luminosity. Moreover, we find that AGN scattered light have a very limited impact on broad-band SED fitting on our sample. Finally, our analysis also suggests a wide range in origins for the observed star formation,which we partially constrain for some sources.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: high-redshift - galaxies: star formation - quasars: general - galaxies: starburst

Simbad objects: 14

goto Full paper

goto View the references in ADS

Number of rows : 14
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 MRC 0152-209 rG 01 54 55.70 -20 40 26.0           ~ 30 2
2 PKS J0327-2239 rG 03 27 04.40 -22 39 39.0           ~ 21 1
3 LEDA 2823818 Sy2 04 08 51.4 -24 18 17     22.40     ~ 76 2
4 4C 41.17 rG 06 50 52.098 +41 30 30.53           ~ 319 1
5 NVSS J083053+191314 rG 08 30 53.44 +19 13 15.7           ~ 67 1
6 PMN J0945-2429 rG 09 45 32.7 -24 28 49           ~ 91 1
7 NAME Spiderweb Galaxy AGN 11 40 48.3 -26 29 09     22.00     ~ 256 1
8 3C 368.0 rG 18 05 06.30 +11 01 32.0   21.5       ~ 243 1
9 NAME TX J1908+7220 rG 19 08 23.50 +72 20 09.8           ~ 53 1
10 [VV2010] J200753.3-131644 QSO 20 07 53.3 -13 16 44           ~ 24 1
11 LEDA 2830749 rG 21 06 58.16 -24 05 11.3   23.0       ~ 71 1
12 87GB 232800.5+391033 EmG 23 30 24.94 +39 27 12.0   24.70 23.97     ~ 50 2
13 4C 28.58 rG 23 51 59.23 +29 10 29.0           ~ 41 1
14 3C 470.0 rG 23 58 35.30 +44 04 38.0   22.5       ~ 108 1

To bookmark this query, right click on this link: simbad:objects in 2016A&A...593A.109D and select 'bookmark this link' or equivalent in the popup menu


2021.09.21-11:01:55

© Université de Strasbourg/CNRS

    • Contact