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

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

School of Physics

Research output: Contribution to journal › Article (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 language	English
Pages (from-to)	L75-L78
Number of pages	4
Journal	Astrophysical Journal
Volume	632
Issue number	2
Publication status	Published - 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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title = "The knotty question of the jet of PKSB1421-490",

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 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.",

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

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

year = "2005",

month = oct,

day = "20",

language = "English",

volume = "632",

pages = "L75--L78",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

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TY - JOUR

T1 - The knotty question of the jet of PKSB1421-490

AU - Gelbord, JM

AU - Marshall, HL

AU - Worrall, DM

AU - Birkinshaw, M

AU - Lovell, JEJ

AU - Ojha, R

AU - Godfrey, L

AU - Schwartz, DA

AU - Perlman, ES

AU - Georganopoulos, M

AU - Murphy, DW

AU - Jauncey, DL

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 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.

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 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.

KW - galaxies : jets

KW - quasars : individual (PKS B1421-490)

KW - BL LACERTAE OBJECTS

KW - DIGITAL SKY SURVEY

KW - X-RAY-EMISSION

KW - CATALOG

KW - SAMPLE

KW - MULTIWAVELENGTH

KW - M87

M3 - Article (Academic Journal)

SN - 0004-637X

VL - 632

SP - L75-L78

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

The knotty question of the jet of PKSB1421-490

Abstract

Keywords

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