The environments of FR II radio sources

M.J. Hardcastle; D.M. Worrall

The environments of FR II radio sources

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Abstract

Using ROSAT observations, we estimate gas pressures in the X-ray-emitting media surrounding 63 FR II radio galaxies and quasars. We compare these pressures with the internal pressures of the radio-emitting plasma estimated by assuming minimum energy or equipartition. The majority of the radio sources (including 12/13 sources with modelled, spatially resolved X-ray emission) appear to be underpressured with respect to the external medium, suggesting that simple minimum-energy arguments underestimate the sources' internal energy densities. Some consequences of this result are discussed.

Original language	English
Title of host publication	In: Procs of Particles and Fields in Radio Galaxies, ASP Conference Series 250
Publisher	Astronomical Society of the Pacific
Pages	358-362
ISBN (Print)	1-58381-090-0
Publication status	Published - 2001

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title = "The environments of FR II radio sources",

abstract = "Using ROSAT observations, we estimate gas pressures in the X-ray-emitting media surrounding 63 FR II radio galaxies and quasars. We compare these pressures with the internal pressures of the radio-emitting plasma estimated by assuming minimum energy or equipartition. The majority of the radio sources (including 12/13 sources with modelled, spatially resolved X-ray emission) appear to be underpressured with respect to the external medium, suggesting that simple minimum-energy arguments underestimate the sources' internal energy densities. Some consequences of this result are discussed.",

author = "M.J. Hardcastle and D.M. Worrall",

note = "Original paper can be found at: http://www.astrosociety.org/pubs/cs/222-252.html--Copyright Astronomical Society of the Pacific",

year = "2001",

language = "English",

isbn = "1-58381-090-0",

pages = "358--362",

booktitle = "In: Procs of Particles and Fields in Radio Galaxies, ASP Conference Series 250",

publisher = "Astronomical Society of the Pacific",

address = "United States",

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TY - GEN

T1 - The environments of FR II radio sources

AU - Hardcastle, M.J.

AU - Worrall, D.M.

N1 - Original paper can be found at: http://www.astrosociety.org/pubs/cs/222-252.html--Copyright Astronomical Society of the Pacific

PY - 2001

Y1 - 2001

N2 - Using ROSAT observations, we estimate gas pressures in the X-ray-emitting media surrounding 63 FR II radio galaxies and quasars. We compare these pressures with the internal pressures of the radio-emitting plasma estimated by assuming minimum energy or equipartition. The majority of the radio sources (including 12/13 sources with modelled, spatially resolved X-ray emission) appear to be underpressured with respect to the external medium, suggesting that simple minimum-energy arguments underestimate the sources' internal energy densities. Some consequences of this result are discussed.

AB - Using ROSAT observations, we estimate gas pressures in the X-ray-emitting media surrounding 63 FR II radio galaxies and quasars. We compare these pressures with the internal pressures of the radio-emitting plasma estimated by assuming minimum energy or equipartition. The majority of the radio sources (including 12/13 sources with modelled, spatially resolved X-ray emission) appear to be underpressured with respect to the external medium, suggesting that simple minimum-energy arguments underestimate the sources' internal energy densities. Some consequences of this result are discussed.

M3 - Conference contribution

SN - 1-58381-090-0

SP - 358

EP - 362

BT - In: Procs of Particles and Fields in Radio Galaxies, ASP Conference Series 250

PB - Astronomical Society of the Pacific

ER -

The environments of FR II radio sources

Abstract

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