Radio Identification of the X-ray Jet in the z=4.3 Quasar GB 1508+5714

Details Radio Identification of the X-ray Jet in the z=4.3 Quasar GB 1508+5714 Radio Identification of the X-ray Jet in the z=4.3 Quasar GB 1508+5714

2003-10-25

arxiv.org/abs/astro-ph/0310733v3

Astrophys.J. 600 (2003) L23-L26

Astronomy and Astrophysics

Astrophysics

7 pages, with 4 figures. ApJL accepted. Figure 4 replaced: several entries which did not affect analysis, were calculated inco

Scientific paper

10.1086/381366

The recent discovery of an X-ray jet in the z=4.3 quasar GB 1508+5714 by Yuan et al. (astro-ph/0309318) and Siemiginowska et al. (astro-ph/0310241) prompted a search for its radio counterpart. Here, we report the successful discovery of faint radio emission from the jet at 1.4 GHz using archival VLA data. The X-ray emission is best interpreted as inverse Compton (IC) emission off the CMB as discussed by the previous investigators. In this scenario, its high X-ray to radio monochromatic luminosity ratio, compared to previously detected IC/CMB X-ray jets at lower redshift, is a natural consequence of its high redshift.

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