The knotty question of the jet of PKS B1421-490

J. M. Gelbord; H. L. Marshall; D. M. Worrall; M. Birkinshaw; J. E.J. Lovell; R. Ojha; L. Godfrey; D. A. Schwartz; E. S. Perlman; M. Georganopoulos; D. W. Murphy; D. L. Jauncey

doi:10.1086/497823

The knotty question of the jet of PKS B1421-490

J. M. Gelbord^*, H. L. Marshall, D. M. Worrall, M. Birkinshaw, J. E.J. Lovell, R. Ojha, L. Godfrey, D. A. Schwartz, E. S. Perlman, M. Georganopoulos, D. W. Murphy, D. L. Jauncey

^*Corresponding author for this work

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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 ∼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 language	English
Pages (from-to)	L75-L78
Journal	Astrophysical Journal
Volume	632
Issue number	2 II
DOIs	https://doi.org/10.1086/497823
Publication status	Published - 20 Oct 2005

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title = "The knotty question of the jet of PKS B1421-490",

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 ∼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.",

keywords = "Galaxies: jets, Quasars: individual (pks b1421-490)",

author = "Gelbord, {J. M.} and Marshall, {H. L.} and Worrall, {D. M.} and M. Birkinshaw and Lovell, {J. E.J.} and R. Ojha and L. Godfrey and Schwartz, {D. A.} and Perlman, {E. S.} and M. Georganopoulos and Murphy, {D. W.} and Jauncey, {D. L.}",

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language = "English",

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T1 - The knotty question of the jet of PKS B1421-490

AU - Gelbord, J. M.

AU - Marshall, H. L.

AU - Worrall, D. M.

AU - Birkinshaw, M.

AU - Lovell, J. E.J.

AU - Ojha, R.

AU - Godfrey, L.

AU - Schwartz, D. A.

AU - Perlman, E. S.

AU - Georganopoulos, M.

AU - Murphy, D. W.

AU - Jauncey, D. L.

PY - 2005/10/20

Y1 - 2005/10/20

N2 - 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 ∼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.

AB - 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 ∼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.

KW - Galaxies: jets

KW - Quasars: individual (pks b1421-490)

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U2 - 10.1086/497823

DO - 10.1086/497823

M3 - Article

SN - 0004-637X

VL - 632

SP - L75-L78

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 II

ER -

The knotty question of the jet of PKS B1421-490

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