2009A&A...501...89T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST23:30:53

2009A&A...501...89T - Astronomy and Astrophysics, volume 501, 89-102 (2009/7-1)

The X-ray view of giga-hertz peaked spectrum radio galaxies.

TENGSTRAND O., GUAINAZZI M., SIEMIGINOWSKA A., FONSECA BONILLA N., LABIANO A., WORRALL D.M., GRANDI P. and PICONCELLI E.

Abstract (from CDS):

This paper presents the X-ray properties of a flux- and volume-limited complete sample of 16 giga-hertz peaked spectrum (GPS) galaxies. This study addresses three basic questions in our understanding of the nature and evolution of GPS sources: a) What is the physical origin of the X-ray emission in GPS galaxies? b) Which physical system is associated with the X-ray obscuration? c) What is the ``endpoint'' of the evolution of compact radio sources? We discuss in this paper the results of the X-ray spectral analysis, and compare the X-ray properties of the sample sources with radio observables. We obtain a 100% (94%) detection fraction in the 0.5-2keV (0.5-10keV) energy band. GPS galaxy X-ray spectra are typically highly obscured (<NHGPS≥ 3x1022cm–2; σNH≃0.5dex). The X-ray column density is larger than the HI column density measured in the radio by a factor 10 to 100. GPS galaxies lie well on the extrapolation to high radio powers of the correlation between radio and X-ray luminosity known in low-luminosity FR I radio galaxies. On the other hand, GPS galaxies exhibit a comparable X-ray luminosity to FR II radio galaxies, notwithstanding their much larger radio luminosity. The X-ray to radio luminosity ratio distribution in our sample is consistent with the bulk of the high-energy emission being produced by the accretion disk, as well as with dynamical models of GPS evolution where X-rays are produced by Compton upscattering of ambient photons. Further support to the former scenario comes from the location of GPS galaxies in the X-ray to O[III] luminosity ratio versus NH plane. We propose that GPS galaxies are young radio sources, which would reach their full maturity as classical FR II radio galaxies. However, column densities ∼1022cm–2 could lead to a significant underestimate of dynamical age determinations based on the hotspot recession velocity measurements.

Abstract Copyright:

Journal keyword(s): galaxies: jets - galaxies: active - X-rays: galaxies

CDS comments: Paragraphe 1. 3C 301.1 is a mispirnt for 3C 303.1

Simbad objects: 22

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Number of rows : 22

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 RX J0022.0+0006 BLL 00 22 00.9555545639 +00 06 57.961251167   20.56 19.63     ~ 24 0
2 ICRF J002225.4+001456 BiC 00 22 25.42593021 +00 14 56.1613786   21.1       ~ 99 1
3 ICRF J002914.2+345632 AGN 00 29 14.24246572 +34 56 32.2471186   20.2       ~ 116 1
4 QSO B0108+388 Bla 01 11 37.31680 +39 06 28.1039     22 22.000   ~ 235 1
5 PKS 0428+205 rG 04 31 03.76136151 +20 37 34.2649550   22.174   19.085   ~ 166 1
6 NAME Per B AGN 04 37 04.37510272 +29 40 13.8184969   21.7       ~ 470 2
7 ICRF J050321.1+020304 Sy2 05 03 21.1971480 +02 03 04.676648   22.500 21.350 20.682   ~ 174 1
8 QSO B0710+439 QSO 07 13 38.16412910 +43 49 17.2071530   20.7       ~ 226 0
9 ICRF J094336.9-081930 LIN 09 43 36.94438939 -08 19 30.8134537   19.401   18.100   ~ 106 2
10 ICRF J103507.0+562846 Sy2 10 35 07.0400250 +56 28 46.795465   20.2 21.244 20.200   ~ 173 1
11 ICRF J112027.8+142054 G 11 20 27.80726 +14 20 54.9914   20 20.935 20.100   ~ 139 1
12 4C 32.44 QSO 13 26 16.51232948 +31 54 09.5144454   21.367 19.822 18.882   ~ 152 1
13 ICRF J134733.3+121724 Sy2 13 47 33.36161542 +12 17 24.2402572   19.28 18.44 15.718   ~ 524 3
14 ICRF J140028.6+621038 Sy2 14 00 28.64868162 +62 10 38.5884658   22.137 20.373 19.530   ~ 156 1
15 QSO B1404+286 BLL 14 07 00.3933203928 +28 27 14.695133019   16.13 15.35 10.29   ~ 674 2
16 8C 1443+773 Sy2 14 43 14.0 +77 07 28   19   18.730   ~ 138 1
17 ICRF J160913.3+264129 Sy2 16 09 13.32076181 +26 41 29.0362080   19       ~ 203 0
18 Granat 1915+105 LXB 19 15 11.54938 +10 56 44.7585           ~ 2281 0
19 PKS 2008-068 rG 20 11 14.21582849 -06 44 03.5554174     17.2     ~ 77 1
20 3C 427.1 rG 21 04 07.3 +76 33 08   23.3 21.1     ~ 145 1
21 ICRF J213032.8+050217 G 21 30 32.87739291 +05 02 17.4741657     23.4     ~ 140 1
22 ICRF J235509.4+495008 Sy2 23 55 09.45814510 +49 50 08.3395036   21.101   18.400   ~ 247 1

    Equat.    Gal    SGal    Ecl

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2020.07.06-23:30:53

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