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Proceedings Paper

Review of techniques for photometric redshift estimation
Author(s): Hongwen Zheng; Yanxia Zhang
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Paper Abstract

A photometric redshift provides an estimate for the distance of an astronomical object, such as a galaxy or quasar, which is a powerful statistical tool for studies of evolutionary properties of galaxies, in particular of faint galaxies, since their spectroscopic data are hard or impossible to obtain. At present, there are amounts of methods to estimate photometric redshifts of galaxies and quasars. These methods are grouped into two kinds: template fitting methods and empirical methods. The commonly used techniques about these two kinds are narrated. The difference of approaches between quasars and galaxies are pointed out. The methods show superiorities in galaxies and maybe show poor performance in quasars. Template-fitting methods and empirical methods have their pros and cons.

Paper Details

Date Published: 24 September 2012
PDF: 12 pages
Proc. SPIE 8451, Software and Cyberinfrastructure for Astronomy II, 845134 (24 September 2012); doi: 10.1117/12.925314
Show Author Affiliations
Hongwen Zheng, North China Electric Power Univ. (China)
Yanxia Zhang, Key Lab. of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology (China)
National Astronomical Observatories, Nanjing Institute of Astronomal Optics & Technology (China)


Published in SPIE Proceedings Vol. 8451:
Software and Cyberinfrastructure for Astronomy II
Nicole M. Radziwill; Gianluca Chiozzi, Editor(s)

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