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The Impact of Stochastic Attenuation on Photometric Redshift Estimates

Published online by Cambridge University Press:  01 August 2006

Thorsten Tepper García  and
Uta Fritze-von Alvensleben
Thorsten Tepper García
Affiliation:
Institut für Astrophysik, Georg-August Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany email: tepper@astro.physik.uni-goettingen.de
Uta Fritze-von Alvensleben
Affiliation:
Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK email: ufritze@star.herts.ac.uk
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Abstract

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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.

Keywords

galaxies: intergalactic mediumgalaxies: high-redshiftgalaxies: photometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 438 - 439
Copyright
Copyright © International Astronomical Union 2007

References

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