2008ApJ...684..811S


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.06CEST00:46:23

2008ApJ...684..811S - Astrophys. J., 684, 811-821 (2008/September-2)

X-ray properties of the gigahertz peaked and compact steep spectrum sources.

SIEMIGINOWSKA A., LAMASSA S., ALDCROFT T.L., BECHTOLD J. and ELVIS M.

Abstract (from CDS):

We present Chandra X-ray Observatory observations of gigahertz peaked-spectrum (GPS) and compact steep spectrum (CSS) radio sources. The Chandra sample contains 13 quasars and 3 galaxies, with measured 2-10 keV X-ray luminosities within 1042-1046 erg/s. We detect all of the sources, five of which are observed in X-rays for the first time. We study the X-ray spectral properties of the sample. The measured absorption columns in the quasars are different from those in the galaxies in that the quasars show no absorption (with limits ∼1021/cm2), while the galaxies have large absorption columns (>1022/cm2) consistent with previous findings. The median photon index of the sources with a high signal-to-noise ratio is Γ=1.84±0.24, which is larger than the typical index of radio-loud quasars. The arcsec resolution of the Chandra telescope allows us to investigate extended X-ray emission and to look for diffuse components and X-ray jets. We found X-ray jets in two quasars (PKS 1127-145 and B2 0738+32), and an X-ray cluster surrounding a CSS quasar (3C 186; z=1.1). We detected a possible binary structure in galaxy 0941-080 and an extended diffuse emission in galaxy PKS B1345+125. We discuss our results in the context of X-ray emission processes and radio source evolution. We conclude that the X-ray emission in these sources is most likely unrelated to a relativistic jet, although the sources' radio loudness may suggest a high radiative efficiency for the jet power in these sources.

Abstract Copyright:

Journal keyword(s): Galaxies: Quasars: Individual - X-Rays: Galaxies

Simbad objects: 18

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Number of rows : 18

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 BCLMP 2 HII 01 33 53 +30 38.1           ~ 3 0
2 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2581 2
3 6C 061543+820331 QSO 06 26 03.00616906 +82 02 25.5678202   17.5 17.5 18.52   ~ 151 1
4 ICRF J074110.7+311200 Sy1 07 41 10.7032630079 +31 12 00.232776104   17.02 16.89 16.322   ~ 421 1
5 3C 186 QSO 07 44 17.4723761217 +37 53 17.249506697   17.5 18.14 17.2   ~ 288 1
6 ICRF J094336.9-081930 LIN 09 43 36.9444590 -08 19 30.818298   19.401   18.100   ~ 112 2
7 QSO J1130-1449 QSO 11 30 07.05259287 -14 49 27.3881476   17.17 16.90 16 16.97 ~ 643 1
8 QSO B1143-245 QSO 11 46 08.1038916032 -24 47 32.896655354   17.97 18.0 17.20   ~ 116 1
9 [VV2006] J123352.7+475003 QSO 12 33 52.7432783196 +47 50 03.898020474   21.18 20.27     ~ 22 0
10 QSO B1245-197 QSO 12 48 23.8980846 -19 59 18.588983   21.52 20.5     ~ 128 1
11 2E 2879 Sy1 12 52 26.3557117356 +56 34 19.567896586   18.42 18.11 17.660   ~ 275 2
12 3C 287 QSO 13 30 37.6950709913 +25 09 10.983254741   18.31 17.67     ~ 332 1
13 ICRF J134733.3+121724 Sy2 13 47 33.36161542 +12 17 24.2402572   19.28 18.44 15.718   ~ 540 3
14 3C 298.0 QSO 14 19 08.1804677481 +06 28 34.803573057   17.12 16.79     ~ 376 1
15 ICRF J145907.5+714019 Sy1 14 59 07.5831170610 +71 40 19.867413302   17.24 16.78 17.2   ~ 460 1
16 [VV96] J181536.8+612711 BLL 18 15 36.7922263 +61 27 11.647435   21.272   19.122   ~ 35 1
17 ICRF J183114.8+290710 Sy2 18 31 14.8601293 +29 07 10.294403   21.917 20.2 20.200   ~ 69 1
18 ICRF J213032.8+050217 AG? 21 30 32.87739291 +05 02 17.4741657     23.4     ~ 149 1

    Equat.    Gal    SGal    Ecl

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2021.05.06-00:46:23

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