The unique, optically-dominated quasar jet of PKS 1421-490

Details The unique, optically-dominated quasar jet of PKS 1421-490 The unique, optically-dominated quasar jet of PKS 1421-490

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.3002g&link_type=abstract

American Astronomical Society Meeting 205, #30.02; Bulletin of the American Astronomical Society, Vol. 36, p.1395

Astronomy and Astrophysics

Astronomy

Scientific paper

The unique, optically-dominated quasar jet of PKS 1421-490
We report the discovery of extremely strong optical and X-ray emission associated with a knot in the radio jet of PKS 1421-490. The SDSS g' = 17.8 magnitude makes this the second-brightest optical jet known. The jet-to-core flux ratio in the X-ray band is unusually large (3.7), and the optical flux ratio ( ˜300) is unprecedented. The broad-band spectrum of the knot is flat from the radio through the optical bands, and has a similar slope with a lower normalization in the X-ray band. This emission is difficult to interpret without resorting to extreme model parameters or physically unlikely scenarios (flat electron distributions, non-equipartition magnetic fields, huge Doppler factors, etc.). We discuss several alternative models for the radio-to-X-ray continuum, including pure synchrotron, synchrotron plus inverse Compton scattering of cosmic microwave background photons, and a decelerating jet.
JMG was supported under Chandra grant GO4-5124X to MIT from the CXC. HLM was supported under NASA contract SAO SV1-61010 for the Chandra X-Ray Center (CXC).

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