scholarly journals Accurate Spectral Energy Distributions and Selection Effects for High‐Redshift Dusty Galaxies: A New Hot Population to Discover with theSpitzer Space Telescope?

2004 ◽  
Vol 611 (1) ◽  
pp. 52-58 ◽  
Author(s):  
A. W. Blain ◽  
S. C. Chapman ◽  
Ian Smail ◽  
Rob Ivison
Keyword(s):  
High Redshift ◽  
Spectral Energy ◽  
Selection Effects ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Space Telescope ◽  
Dusty Galaxies

scholarly journals The Optical/Near-IR Colours of Red Quasars

2000 ◽  
Vol 17 (1) ◽  
pp. 56-71 ◽  
Author(s):  
Paul J. Francis ◽  
Matthew T. Whiting ◽  
Rachel L. Webster
Keyword(s):  
Power Law ◽  
High Redshift ◽  
Sloan Digital Sky Survey ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Red Power ◽  
Near Ir ◽  
Sky Survey ◽  
Ir Photometry

AbstractWe present quasi-simultaneous multi-colour optical/near-IR photometry for 157 radio selected quasars, forming an unbiassed sub-sample of the Parkes Flat-Spectrum Sample. Data are also presented for 12 optically selected QSOs, drawn from the Large Bright QSO Survey. The spectral energy distributions of the radio- and optically-selected sources are quite different. The optically selected QSOs are all very similar: they have blue spectral energy distributions curving downwards at shorter wavelengths. Roughly 90% of the radio-selected quasars have roughly power-law spectral energy distributions, with slopes ranging from Fv∝v0 to Fv∝v−2. The remaining 10% have spectral energy distributions showing sharp peaks: these are radio galaxies and highly reddened quasars. Four radio sources were not detected down to magnitude limits of H ∼ 19·6. These are probably high redshift (z > 3) galaxies or quasars. We show that the colours of our red quasars lie close to the stellar locus in the optical: they will be hard to identify in surveys such as the Sloan Digital Sky Survey. If near-IR photometry is added, however, the red power-law sources can be clearly separated from the stellar locus: IR surveys such as 2MASS should be capable of finding these sources on the basis of their excess flux in the K-band.

scholarly journals Spectral Energy Distributions of Dusty Galaxies

2003 ◽  
Vol 55 (2) ◽  
pp. 385-407 ◽  
Author(s):  
Toshinobu Takagi ◽  
Vladas Vansevičius ◽  
Nobuo Arimoto
Keyword(s):  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Dusty Galaxies

scholarly journals Infrared to x-ray spectral energy distributions of high redshift quasars

1994 ◽  
Vol 108 ◽  
pp. 374 ◽  
Author(s):  
Jill Bechtold ◽  
Martin Elvis ◽  
Fabrizio Fiore ◽  
Olga Kuhn ◽  
Roc M. Cutri ◽  
...  
Keyword(s):  
High Redshift ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
X Ray

IR to X-ray spectral energy distributions of high redshift quasars

1994 ◽  
Author(s):  
Jill Bechtold ◽  
Roc Cutri ◽  
Marcia Rieke ◽  
Martin Elvis ◽  
Fabrizio Fiore ◽  
...  
Keyword(s):  
High Redshift ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
X Ray
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