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Chandra Discovery of a 300 kpc X-ray Jet in the GPS Quasar PKS1127-145

Aneta Siemiginowska·Jill Bechtold·Thomas L. Aldcroft·Martin Elvis·D. E. Harris·Adam Dobrzycki
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Abstract

We have discovered an X-ray jet with Chandra imaging of the z=1.187 radio-loud quasar PKS1127-145. In this paper we present the Chandra X-ray data, follow-up VLA observations, and optical imaging using the HST WFPC2. The X-ray jet contains 273+/-5 net counts in 27ksec and extends ~30 arcsec, from the quasar core, corresponding to a minimum projected linear size of ~330/h_50 kpc. The evaluation of the X-ray emission processes is complicated by the observed offsets between X-ray and radio brightness peaks. We discuss the problems posed by these observations to jet models. In addition, PKS1127-145 is a Giga-Hertz Peaked Spectrum radio source, a member of the class of radio sources suspected to be young or ``frustrated'' versions of FRI radio galaxies. However the discovery of an X-ray and radio jet extending well outside the host galaxy of PKS1127-145 suggests that activity in this and other GPS sources may be long-lived and complex.

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Aneta Siemiginowska, Jill Bechtold, Thomas L. Aldcroft, Martin Elvis, D. E. Harris, Adam Dobrzycki. 2002-01-08. Chandra Discovery of a 300 kpc X-ray Jet in the GPS Quasar PKS1127-145. https://doi.org/10.1086/339629

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