Relativistic X-ray jets at high redshift

Abstract

Powerful radio sources and quasars emit relativistic jets of plasma and magnetic fields that travel hundreds of kilo-parsecs, ultimately depositing energy into the intra- or inter-cluster medium. In the rest frame of the jet, the energy density of the cosmic microwave background is enhanced by the bulk Lorentz factor squared, and when this exceeds the magnetic energy density the primary loss mechanism of the relativistic electrons is via inverse Compton scattering. The microwave energy density is also enhanced by a factor (1+z)^4, which becomes important at large redshifts. We are using Chandra to survey a z>3 sub-sample of radio sources selected with 21 cm wavelength flux density > 70 mJy, and with a spectroscopic redshift. Out of the first 12 objects observed, there are two clear cases of the X-rays extending beyond the detectable radio jet.

6 pages, 4 figures. In proceedings of the IWARA 2018 conference, to be published in Astronomische Nachrichten

References in corpus (10)

• X-ray Emission from Extragalactic Jets
• Planck intermediate results. LI. Features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters
• An X-ray jet discovered by Chandra in the z=4.3 radio-selected quasar GB 1508+5714
• Fermi non-detections of four X-ray jet sources and implications for the IC/CMB mechanism
• Observations of Magnetic Fields and Relativistic Beaming in Four Quasar Jets
• Multiwavelength evidence of the physical processes in radio jets
• An X-ray Imaging Survey of Quasar Jets -- The Complete Survey
• Serendipitous discovery of an extended X-ray jet without a radio counterpart in a high-redshift quasar
• Discovery of a Kiloparsec Scale X-ray/Radio Jet in the z=4.72 Quasar GB 1428+4217
• Multi-frequency investigation of the parsec- and kilo-parsec-scale radio structures in high-redshift quasar PKS 1402+044

Cited by in corpus (7)

• Blazars at the Cosmic Dawn
• Inverse-Compton scattering in the resolved jet of the high-redshift quasar PKS J1421-0643
• Direct observation of an extended X-ray jet at $z$=6.1
• Two Candidate High-Redshift X-ray Jets Without Coincident Radio Jets
• The Impact of the CMB on the Evolution of high-z Blazars
• X-Ray-to-Radio Offset Inference from Low-Count X-Ray Jets
• Multi-scale Radio and X-ray Structure of the High-redshift Quasar PMN J0909+0354