Dust heating in the cores of 3CRR radio galaxies

M. Birkinshaw; D. M. Worrall; A. Bliss

doi:10.1017/S1743921315002355

Dust heating in the cores of 3CRR radio galaxies

M. Birkinshaw, D. M. Worrall, A. Bliss

School of Physics

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

Abstract

We have undertaken a Spitzer campaign to measure the IR structures and spectra of low-redshift 3CRR radio galaxies. The results show that the 3.6 - 160 micron infrared properties vary systematically with integrated source power, and so demonstrate that contemporary core activity is characteristic of the behaviour of sources over their lifetimes. IR synchrotron emission is seen from jets and hotspots in some cases. Thermal emission is found from a jet/gas interaction in NGC 7385. Most of the near-IR integrated colours of the low-redshift 3CRR radio galaxies are similar to those of passive galaxies, so that IR colours are poor indicators of radio activity.

Original language	English
Pages (from-to)	294-298
Number of pages	5
Journal	Proceedings of the International Astronomical Union
Volume	313
DOIs	https://doi.org/10.1017/S1743921315002355
Publication status	Published - 28 Apr 2015
Event	Extragalactic Jets from Every Angle - Galapagos Islands, Puerto Ayora, Ecuador Duration: 15 Sept 2014 → 19 Sept 2014

Bibliographical note

5 pages, 3 figures

Keywords

astro-ph.HE
astro-ph.GA

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10.1017/S1743921315002355

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Research in planetary physics, astrophysics and cosmology at Bristol
Birkinshaw, M. (Principal Investigator)
1/04/12 → 1/04/15
Project: Research

Cite this

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title = "Dust heating in the cores of 3CRR radio galaxies",

abstract = "We have undertaken a Spitzer campaign to measure the IR structures and spectra of low-redshift 3CRR radio galaxies. The results show that the 3.6 - 160 micron infrared properties vary systematically with integrated source power, and so demonstrate that contemporary core activity is characteristic of the behaviour of sources over their lifetimes. IR synchrotron emission is seen from jets and hotspots in some cases. Thermal emission is found from a jet/gas interaction in NGC 7385. Most of the near-IR integrated colours of the low-redshift 3CRR radio galaxies are similar to those of passive galaxies, so that IR colours are poor indicators of radio activity.",

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author = "M. Birkinshaw and Worrall, \{D. M.\} and A. Bliss",

note = "5 pages, 3 figures; Extragalactic Jets from Every Angle ; Conference date: 15-09-2014 Through 19-09-2014",

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doi = "10.1017/S1743921315002355",

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T1 - Dust heating in the cores of 3CRR radio galaxies

AU - Birkinshaw, M.

AU - Worrall, D. M.

AU - Bliss, A.

N1 - 5 pages, 3 figures

PY - 2015/4/28

Y1 - 2015/4/28

N2 - We have undertaken a Spitzer campaign to measure the IR structures and spectra of low-redshift 3CRR radio galaxies. The results show that the 3.6 - 160 micron infrared properties vary systematically with integrated source power, and so demonstrate that contemporary core activity is characteristic of the behaviour of sources over their lifetimes. IR synchrotron emission is seen from jets and hotspots in some cases. Thermal emission is found from a jet/gas interaction in NGC 7385. Most of the near-IR integrated colours of the low-redshift 3CRR radio galaxies are similar to those of passive galaxies, so that IR colours are poor indicators of radio activity.

AB - We have undertaken a Spitzer campaign to measure the IR structures and spectra of low-redshift 3CRR radio galaxies. The results show that the 3.6 - 160 micron infrared properties vary systematically with integrated source power, and so demonstrate that contemporary core activity is characteristic of the behaviour of sources over their lifetimes. IR synchrotron emission is seen from jets and hotspots in some cases. Thermal emission is found from a jet/gas interaction in NGC 7385. Most of the near-IR integrated colours of the low-redshift 3CRR radio galaxies are similar to those of passive galaxies, so that IR colours are poor indicators of radio activity.

KW - astro-ph.HE

KW - astro-ph.GA

U2 - 10.1017/S1743921315002355

DO - 10.1017/S1743921315002355

M3 - Article (Academic Journal)

SN - 1743-9213

VL - 313

SP - 294

EP - 298

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

T2 - Extragalactic Jets from Every Angle

Y2 - 15 September 2014 through 19 September 2014

ER -

Dust heating in the cores of 3CRR radio galaxies

Abstract

Bibliographical note

Keywords

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Projects

Research in planetary physics, astrophysics and cosmology at Bristol

Cite this