The knotty question of the jet of PKSB1421-490

JM Gelbord*, HL Marshall, DM Worrall, M Birkinshaw, JEJ Lovell, R Ojha, L Godfrey, DA Schwartz, ES Perlman, M Georganopoulos, DW Murphy, DL Jauncey

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

We report the discovery of unusually strong optical and X-ray emission associated with a knot in the radio jet of PKS B1421-490. The knot is the brightest feature observed beyond the radio band, with knot/core flux ratios similar to 300 and 3.7 at optical and X-ray frequencies, respectively. We interpret the extreme optical output of the knot as synchrotron emission. The nature of the X-ray emission is unclear. We consider a second synchrotron component, inverse Compton emission from a relativistic, decelerating jet, and the possibility that this feature is a chance superposition of an unusual BL Lac object.

Original languageEnglish
Pages (from-to)L75-L78
Number of pages4
JournalAstrophysical Journal
Volume632
Issue number2
Publication statusPublished - 20 Oct 2005

Keywords

  • galaxies : jets
  • quasars : individual (PKS B1421-490)
  • BL LACERTAE OBJECTS
  • DIGITAL SKY SURVEY
  • X-RAY-EMISSION
  • CATALOG
  • SAMPLE
  • MULTIWAVELENGTH
  • M87

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