The Impact of Stochastic Attenuation on Photometric Redshift Estimates

We model the stochastic attenuation by HI absorbers in the intergalactic medium (IGM), such as Lyα Forest clouds, and absorbers associated with galaxies, such as Lyman Limit systems (LLS) and Damped Lyman Alpha absorbers (DLAs), and compute an ensemble of 4 · 103 attenuated Spectral Energy Distribut...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2006-08, Vol.2 (S235), p.438-439
Main Authors: García, Thorsten Tepper, Alvensleben, Uta Fritze-von
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Contributed Papers
Red shift
Spectrum analysis
Star & galaxy formation
Stochastic models
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Summary:We model the stochastic attenuation by HI absorbers in the intergalactic medium (IGM), such as Lyα Forest clouds, and absorbers associated with galaxies, such as Lyman Limit systems (LLS) and Damped Lyman Alpha absorbers (DLAs), and compute an ensemble of 4 · 103 attenuated Spectral Energy Distributions (SEDs) in the Johnson system for the spectrum of a galaxy with a constant star formation rate (CSFR). Using these, we asses the impact of the stochastic attenuation on the estimates of photometric redshifts for this type of galaxy by comparison with model SEDs that include only a mean attenuation.
ISSN:1743-9213
1743-9221
DOI:10.1017/S174392130601060X