2007A&A...471..775R


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.23CET19:09:52

2007A&A...471..775R - Astronomy and Astrophysics, volume 471, 775-786 (2007/9-1)

An XMM-Newton study of hyper-luminous infrared galaxies.

RUIZ A., CARRERA F.J. and PANESSA F.

Abstract (from CDS):

Hyper-Luminous Infrared Galaxies (HLIRGs) are the most luminous persistent objects in the Universe. They exhibit extremely high star formation rates, and most of them seem to harbor an Active Galactic Nucleus (AGN). They are unique laboratories to investigate ultimate star formation, and its connection to super-massive black hole growth. X-ray studies of HLIRGs have the potential to unravel the AGN contribution to the bolometric output from these bright objects. We have selected a sample of 14 HLIRGs observed by XMM-Newton (type 1, type 2 AGN and starburst), 5 of which are candidates to be Compton-thick objects. This is the first time that a systematic study of this type of objects has been carried out in the X-ray spectral band. Their X-ray spectral properties have been correlated with their infrared luminosities, estimated by IRAS, ISO and sub-millimeter observations. The X-ray spectra of HLIRGs present heterogeneous properties. All our X-ray detected HLIRGs (10) have AGN-dominated X-ray spectra. The hard X-ray luminosity of 8 of them is consistent with a pure AGN contribution, while in the remaining 2 sources, both an AGN and a starburst seem to contribute to the overall emission. We found soft excess emission in 5 sources. In one of them it is consistent with a pure starburst origin, while in the other 4 sources it is consistent with an AGN origin. The observed X-ray emission is systematically below that expected for a standard local QSO of the same IR luminosity, suggesting the possible presence of absorption in type 2 objects and/or a departure from a standard spectral energy distribution of QSO. The X-ray-to-IR-luminosity ratio is constant with redshift, indicating similar evolutions for the AGN and starburst component, and that their respective power sources could be physically related.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: starburst - galaxies: evolution - X-rays: galaxies - infrared: galaxies

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IRAS F00183-7111 Sy2 00 20 34.7 -70 55 27     20.6     ~ 121 0
2 IRAS F00235+1024 G 00 26 06.651 +10 41 26.57           ~ 24 0
3 LEDA 2816582 G 07 40 10.4 -23 49 58           ~ 14 0
4 2MASS J09134545+4056282 Sy2 09 13 45.4949162350 +40 56 28.214305677   19.69 19.21     ~ 231 2
5 QSO J1208+4540 QSO 12 08 58.0106507296 +45 40 35.422302500   16.00 15.70     ~ 175 0
6 LB 19 QSO 12 50 05.726 +26 31 07.51   16.12 15.92     ~ 184 0
7 LB 11408 QSO 12 53 17.5763588311 +31 05 50.630845196   17.20 17.00     ~ 54 0
8 2XMM J125400.8+101112 Sy2 12 54 00.8204 +10 11 12.550   19.03 18.27     ~ 45 0
9 IRAS 13279+3401 QSO 13 30 15.2480 +33 46 29.545     17.20     ~ 23 0
10 3XMM J140438.9+432707 Sy1 14 04 38.7982068124 +43 27 07.453977673   16.12 15.76     ~ 113 0
11 [VV2006] J142355.5+383150 QSO 14 23 55.5050602847 +38 31 50.551686283   19.1 19.36 18.8   ~ 33 0
12 2XMM J153244.0+324248 Sy2 15 32 44.0259738182 +32 42 46.719802275     19.8     ~ 104 0
13 QSO B1634+7037 QSO 16 34 28.9917493918 +70 31 32.394595988   14.90 14.66     ~ 259 0
14 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 491 1
15 2E 4066 Sy1 18 21 57.2365 +64 20 36.226   14.23 14.24     ~ 531 1

    Equat.    Gal    SGal    Ecl

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2020.02.23-19:09:52

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