J/AJ/105/853 Energy distributions of radio galaxies (Impey+ 1993)
Energy distributions of radio galaxies
IMPEY C., GREGORINI L.
<Astron. J. 105, 853 (1993)>
=1993AJ....105..853I 1993AJ....105..853I
ADC_Keywords: Galaxies, radio; Infrared sources
Abstract:
Far-infrared observations of 140 radio galaxies from the 3CR and B2
catalogs are presented. The galaxies span a range of over four order
of magnitude in the radio power, from weak nuclear sources in nearby
galaxies, to powerful FR II doubled-lobed sources at moderate redshift.
Scanned or pointed observations with IRAS detect 38 of the radio
galaxies in at least one waveband; 21 are detected at both 60 and
100 µm. The strength of the far-infrared emission is more closely
correlated with core radio emission than with total radio emission, and
it is independent of the absolute visual magnitude of the host galaxy.
The more luminous 3CR galaxies have warmer far infrared emission than
the less luminous B2 galaxies. The relationship between radio and
far-infrared luminosity is determined in a way that is insensitive
to the large number of infrared nondetections. Radio galaxies have
far-infrared emission with similar color temperatures to normal
ellipticals; however the inferred amounts of cold interstellar
material are typical of gas-rich galaxies. Infrared luminous radio
galaxies are rare. Only one in 105 ellipticals with MV←17 has
a strong enough radio core to have 1011 LSun of far-infrared
emission. Indirect arguments indicates that far-infrared emission
in radio galaxies represents star formation that is more closely
tied to the active nucleus than to the global properties of the
galaxy. The far-infrared luminosity function shows good continuity
between radio galaxies and radio loud quasars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table12 93 140 B2 and 3CR radio galaxies
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Byte-by-byte Description of file: table12
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Galaxy name
16- 21 F6.4 --- z Redshift
26- 30 F5.1 mag mv []? Visual magnitude
32- 37 I6 mJy S408 Total radio flux at 408MHz
40 A1 --- l_S5 Limit flag on S5
41- 46 F6.1 mJy S5 Core radio flux at 5GHz
50 A1 --- l_S12 Limit flag on S12
51- 54 I4 mJy S12 []? IRAS flux density at 12 microns
58- 59 I2 mJy e_S12 []? rms uncertainty on S12
64 A1 --- l_S25 Limit flag on S25
65- 68 I4 mJy S25 []? IRAS flux density at 25 microns
70- 71 I2 mJy e_S25 []? rms uncertainty on S25
73 A1 --- l_S60 Limit flag on S60
74- 77 I4 mJy S60 []? IRAS flux density at 60 microns
79- 80 I2 mJy e_S60 []? rms uncertainty on S60
82 A1 --- l_S100 Limit flag on S100
83- 86 I4 mJy S100 []? IRAS flux density at 100 microns
88- 90 I3 mJy e_S100 []? rms uncertainty on S100
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Courtesy: Chris Impey
(End) Patricia Bauer [CDS] 05-Jul-1994