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Author
dc.contributor.author
Budavari, T 
Author
dc.contributor.author
Szalay, A S 
Author
dc.contributor.author
Connolly, A J 
Author
dc.contributor.author
Csabai, I 
Author
dc.contributor.author
Dickinson, M 
Availability Date
dc.date.accessioned
2020-08-08T20:57:11Z
Availability Date
dc.date.available
2020-08-08T20:57:11Z
Release
dc.date.issued
2000
uri
dc.identifier.uri
http://hdl.handle.net/10831/49274
Abstract
dc.description.abstract
Understanding how the physical properties of galaxies (e.g., their spectral type or age) evolve as a function of redshift relies on having an accurate representation of galaxy spectral energy distributions. While it has been known for some time that galaxy spectra can be reconstructed from a handful of orthogonal basis templates, the underlying basis is poorly constrained. The limiting factor has been the lack of large samples of galaxies (covering a wide range in spectral type) with high signal-to-noise spectrophotometric observations. To alleviate this problem we introduce here a new technique for reconstructing galaxy spectral energy distributions directly from samples of galaxies with broadband photometric data and spectroscopic redshifts. Exploiting the statistical approach of the Karhunen-Loeve expansion, our iterative training procedure increasingly improves the eigenbasis, so that it provides better agreement with the photometry. We demonstrate the utility of this approach by applying these improved spectral energy distributions to the estimation of photometric redshifts for the HDF sample of galaxies. We find that in a small number of iterations the dispersion in the photometric redshifts estimator (a comparison between predicted and measured redshifts) can decrease by up to a factor of 2.
Language
dc.language
Angol
Title
dc.title
Creating spectral templates from multicolor redshift surveys
Type
dc.type
folyóiratcikk
Date Change
dc.date.updated
2020-06-05T13:30:31Z
Scope
dc.format.page
1588-1598
Doi ID
dc.identifier.doi
10.1086/301514
Wos ID
dc.identifier.wos
000089670300034
ID Scopus
dc.identifier.scopus
0039772281
MTMT ID
dc.identifier.mtmt
1064419
Issue Number
dc.identifier.issue
3
abbreviated journal
dc.identifier.jabbrev
ASTRON J
Journal
dc.identifier.jtitle
ASTRONOMICAL JOURNAL
Volume Number
dc.identifier.volume
120
Release Date
dc.description.issuedate
2000
department of Author
dc.contributor.institution
Alba Regia Egyetemi Központ
department of Author
dc.contributor.institution
Fizikai Intézet
department of Author
dc.contributor.institution
Mérnöki Intézet
department of Author
dc.contributor.institution
Komplex Rendszerek Fizikája Tanszék
Author institution
dc.contributor.department
Komplex Rendszerek Fizikája Tanszék
Author institution
dc.contributor.department
Komplex Rendszerek Fizikája Tanszék


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Creating spectral templates from multicolor redshift surveys
 

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