NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-26 T03:39:53 PDT
Help | Comment | NED Home

For refcode 2005ApJ...632..110S:
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2005ApJ...632..110S X-Ray Cluster Associated with the z = 1.063 CSS Quasar 3C 186: The Jet is Not Frustrated Aneta Siemiginowska, C. C. Cheung, Stephanie LaMassa, D. J. Burke, Thomas L. Aldcroft, Jill Bechtold, Martin Elvis, and D. M. Worrall Abstract. We report the Chandra discovery of an X-ray cluster at redshift z=1.063 associated with the compact steep spectrum (CSS) radio-loud quasar 3C 186 (Q0740+380). Diffuse X-ray emission is detected out to ~120 kpc from the quasar and contains 741+/-40 net counts. The X-ray spectrum of the extended emission shows strong Fe-line emission (EW=412 eV) at the quasar redshift and confirms the thermal nature of this diffuse component. We measure a cluster temperature of 5.2^+1.2^_-0.9_ keV and an X-ray luminosity L_X_(0.5 -- 2keV)~6x10^44^ ergs s^-1^, which are in agreement with the luminosity-temperature relation for high-redshift clusters. This is the first detection of a bright X-ray cluster around a luminous (L_bol_~10^47^ ergs s^-1^) CSS quasar at high redshift and is only the fifth z>1 X-ray cluster detected. We find that the CSS radio source is highly overpressured with respect to the thermal cluster medium by about 3 orders of magnitude. This provides direct observational evidence that the radio source is not thermally confined as posited in the "frustrated" scenario for CSS sources. Instead, it appears that the radio source may be young and we are observing it at an early stage of its evolution. In that case the radio source could supply the energy into the cluster and potentially prevent its cooling. Key words: quasars: individual (3C 186), X-Rays: Galaxies: Clusters
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

Back to NED Home