Infrared studies of elliptical galaxies. II. A radio-selected sample

C. D. Impey; C. G. Wynn-Williams; E. E. Becklin

doi:10.1086/168816

Infrared studies of elliptical galaxies. II. A radio-selected sample

C. D. Impey, C. G. Wynn-Williams, E. E. Becklin

Astronomy

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We have made an infrared survey of radio galaxies in the Bologna B2 catalog. We find that 40% of our sample have infrared luminosities of at least 10⁹ L⊙, as opposed to about 8% of normal ellipticals. The galaxies are inhomogeneous in their infrared properties; some galaxies have active nuclei, while others appear to be powered by star formation. The most infrared-luminous galaxies in our sample are those listed as "peculiar" by Zwicky. Statistically, these galaxies are strikingly different from Seyfert galaxies in their infrared properties in that they show much more radio emission in comparison with their infrared emission than do Seyferts, even when the emission from the extended radio lobes has been discounted. We also reanalyze the available data on the infrared properties of normal elliptical galaxies and find confirmation that the 10-12 μm emission from these galaxies comes either from circumstellar dust shells around evolved stars or from PAH-like (polycyclic aromatic hydrocarbon) grains.

Original language	English (US)
Pages (from-to)	62-74
Number of pages	13
Journal	Astrophysical Journal
Volume	356
Issue number	1
DOIs	https://doi.org/10.1086/168816
State	Published - Jun 10 1990

Keywords

Galaxies: photometry
Infrared: sources
Radio sources: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/168816

Cite this

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title = "Infrared studies of elliptical galaxies. II. A radio-selected sample",

abstract = "We have made an infrared survey of radio galaxies in the Bologna B2 catalog. We find that 40% of our sample have infrared luminosities of at least 109 L⊙, as opposed to about 8% of normal ellipticals. The galaxies are inhomogeneous in their infrared properties; some galaxies have active nuclei, while others appear to be powered by star formation. The most infrared-luminous galaxies in our sample are those listed as {"}peculiar{"} by Zwicky. Statistically, these galaxies are strikingly different from Seyfert galaxies in their infrared properties in that they show much more radio emission in comparison with their infrared emission than do Seyferts, even when the emission from the extended radio lobes has been discounted. We also reanalyze the available data on the infrared properties of normal elliptical galaxies and find confirmation that the 10-12 μm emission from these galaxies comes either from circumstellar dust shells around evolved stars or from PAH-like (polycyclic aromatic hydrocarbon) grains.",

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author = "Impey, {C. D.} and Wynn-Williams, {C. G.} and Becklin, {E. E.}",

year = "1990",

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T1 - Infrared studies of elliptical galaxies. II. A radio-selected sample

AU - Impey, C. D.

AU - Wynn-Williams, C. G.

AU - Becklin, E. E.

PY - 1990/6/10

Y1 - 1990/6/10

N2 - We have made an infrared survey of radio galaxies in the Bologna B2 catalog. We find that 40% of our sample have infrared luminosities of at least 109 L⊙, as opposed to about 8% of normal ellipticals. The galaxies are inhomogeneous in their infrared properties; some galaxies have active nuclei, while others appear to be powered by star formation. The most infrared-luminous galaxies in our sample are those listed as "peculiar" by Zwicky. Statistically, these galaxies are strikingly different from Seyfert galaxies in their infrared properties in that they show much more radio emission in comparison with their infrared emission than do Seyferts, even when the emission from the extended radio lobes has been discounted. We also reanalyze the available data on the infrared properties of normal elliptical galaxies and find confirmation that the 10-12 μm emission from these galaxies comes either from circumstellar dust shells around evolved stars or from PAH-like (polycyclic aromatic hydrocarbon) grains.

AB - We have made an infrared survey of radio galaxies in the Bologna B2 catalog. We find that 40% of our sample have infrared luminosities of at least 109 L⊙, as opposed to about 8% of normal ellipticals. The galaxies are inhomogeneous in their infrared properties; some galaxies have active nuclei, while others appear to be powered by star formation. The most infrared-luminous galaxies in our sample are those listed as "peculiar" by Zwicky. Statistically, these galaxies are strikingly different from Seyfert galaxies in their infrared properties in that they show much more radio emission in comparison with their infrared emission than do Seyferts, even when the emission from the extended radio lobes has been discounted. We also reanalyze the available data on the infrared properties of normal elliptical galaxies and find confirmation that the 10-12 μm emission from these galaxies comes either from circumstellar dust shells around evolved stars or from PAH-like (polycyclic aromatic hydrocarbon) grains.

KW - Galaxies: photometry

KW - Infrared: sources

KW - Radio sources: galaxies

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ER -

Infrared studies of elliptical galaxies. II. A radio-selected sample

Abstract

Keywords

ASJC Scopus subject areas

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