Extreme jet bending on kiloparsec scales: the 'doughnut' in NGC 6109

Josie Rawes; Mark Birkinshaw; Diana M Worrall

doi:10.1093/mnras/sty2074

Extreme jet bending on kiloparsec scales: the 'doughnut' in NGC 6109

Josie Rawes, Mark Birkinshaw, Diana M Worrall

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

3 Citations (Scopus)

244 Downloads (Pure)

Abstract

We present new radio observations of the z = 0.029 radio galaxy NGC 6109, a member of the 3CRR sample. We find the radio morphology of the counter-jet to be highly distorted, showing a unique 'doughnut' structure ~6 kpc in diameter. The doughnut is overpressured compared with the surrounding atmosphere as measured with Chandra. We investigate the polarisation properties of the source and find evidence for an interaction between the doughnut and the external environment. This may cause the extreme jet bend. Alternatively, while providing no explanation for the rotation-measure and magnetic field structure seen in the doughnut, a ballistic precession model may be feasible if the ballistic flow persists for a distance much less than the full extent of the 100 kpc-scale jet. A light jet being deflected by gas flows and winds just outside the transition between the galaxy and cluster atmospheres appears to be a more plausible interpretation.

Original language	English
Article number	sty2074
Pages (from-to)	3644-3654
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	480
Issue number	3
Early online date	1 Aug 2018
DOIs	https://doi.org/10.1093/mnras/sty2074
Publication status	Published - Nov 2018

Keywords

galaxies: active
galaxies: individual: (NGC 6109)
radio continuum: galaxies

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10.1093/mnras/sty2074

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Cite this

@article{33af57a60b7c482ba57e8cab9120546b,

title = "Extreme jet bending on kiloparsec scales: the 'doughnut' in NGC 6109",

abstract = "We present new radio observations of the z = 0.029 radio galaxy NGC 6109, a member of the 3CRR sample. We find the radio morphology of the counter-jet to be highly distorted, showing a unique 'doughnut' structure ~6 kpc in diameter. The doughnut is overpressured compared with the surrounding atmosphere as measured with Chandra. We investigate the polarisation properties of the source and find evidence for an interaction between the doughnut and the external environment. This may cause the extreme jet bend. Alternatively, while providing no explanation for the rotation-measure and magnetic field structure seen in the doughnut, a ballistic precession model may be feasible if the ballistic flow persists for a distance much less than the full extent of the 100 kpc-scale jet. A light jet being deflected by gas flows and winds just outside the transition between the galaxy and cluster atmospheres appears to be a more plausible interpretation. ",

keywords = "galaxies: active, galaxies: individual: (NGC 6109), radio continuum: galaxies",

author = "Josie Rawes and Mark Birkinshaw and Worrall, {Diana M}",

year = "2018",

month = nov,

doi = "10.1093/mnras/sty2074",

language = "English",

volume = "480",

pages = "3644--3654",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

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TY - JOUR

T1 - Extreme jet bending on kiloparsec scales

T2 - the 'doughnut' in NGC 6109

AU - Rawes, Josie

AU - Birkinshaw, Mark

AU - Worrall, Diana M

PY - 2018/11

Y1 - 2018/11

N2 - We present new radio observations of the z = 0.029 radio galaxy NGC 6109, a member of the 3CRR sample. We find the radio morphology of the counter-jet to be highly distorted, showing a unique 'doughnut' structure ~6 kpc in diameter. The doughnut is overpressured compared with the surrounding atmosphere as measured with Chandra. We investigate the polarisation properties of the source and find evidence for an interaction between the doughnut and the external environment. This may cause the extreme jet bend. Alternatively, while providing no explanation for the rotation-measure and magnetic field structure seen in the doughnut, a ballistic precession model may be feasible if the ballistic flow persists for a distance much less than the full extent of the 100 kpc-scale jet. A light jet being deflected by gas flows and winds just outside the transition between the galaxy and cluster atmospheres appears to be a more plausible interpretation.

AB - We present new radio observations of the z = 0.029 radio galaxy NGC 6109, a member of the 3CRR sample. We find the radio morphology of the counter-jet to be highly distorted, showing a unique 'doughnut' structure ~6 kpc in diameter. The doughnut is overpressured compared with the surrounding atmosphere as measured with Chandra. We investigate the polarisation properties of the source and find evidence for an interaction between the doughnut and the external environment. This may cause the extreme jet bend. Alternatively, while providing no explanation for the rotation-measure and magnetic field structure seen in the doughnut, a ballistic precession model may be feasible if the ballistic flow persists for a distance much less than the full extent of the 100 kpc-scale jet. A light jet being deflected by gas flows and winds just outside the transition between the galaxy and cluster atmospheres appears to be a more plausible interpretation.

KW - galaxies: active

KW - galaxies: individual: (NGC 6109)

KW - radio continuum: galaxies

U2 - 10.1093/mnras/sty2074

DO - 10.1093/mnras/sty2074

M3 - Article (Academic Journal)

VL - 480

SP - 3644

EP - 3654

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

M1 - sty2074

ER -