Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7

Autores
O'Mill, Ana Laura; Duplancic Videla, Maria Fernanda; Garcia Lambas, Diego Rodolfo; Sodré Junior, Laerte
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a catalogue of galaxy photometric redshifts and k-corrections for the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7), available on the World Wide Web. The photometric redshifts were estimated with an artificial neural network using five ugriz bands, concentration indices and Petrosian radii in the g and r bands. We have explored our redshift estimates with different training sets, thus concluding that the best choice for improving redshift accuracy comprises the main galaxy sample (MGS), the luminous red galaxies and the galaxies of active galactic nuclei covering the redshift range 0 < z≤ 0.3. For the MGS, the photometric redshift estimates agree with the spectroscopic values within rms = 0.0227. The distribution of photometric redshifts derived in the range 0 < zphot≤ 0.6 agrees well with the model predictions. k-corrections were derived by calibration of the k-correct_v4.2 code results for the MGS with the reference-frame (z= 0.1) (g−r) colours. We adopt a linear dependence of k-corrections on redshift and (g−r) colours that provide suitable distributions of luminosity and colours for galaxies up to redshift zphot= 0.6 comparable to the results in the literature. Thus, our k-correction estimate procedure is a powerful, low computational time algorithm capable of reproducing suitable results that can be used for testing galaxy properties at intermediate redshifts using the large SDSS data base.
Fil: O'Mill, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Duplancic Videla, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Garcia Lambas, Diego Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Sodré Junior, Laerte. Universidade Do Sao Paulo. Instituto Astronomia, Geofisica E Ciencias Atmosfericas. Departamento de Astronomia; Brasil
Materia
GALAXIES: DISTANCES AND REDSHIFTS
GALAXIES: FORMATION
COSMOLOGY: THEORY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/12992
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7O'Mill, Ana LauraDuplancic Videla, Maria FernandaGarcia Lambas, Diego RodolfoSodré Junior, LaerteGALAXIES: DISTANCES AND REDSHIFTSGALAXIES: FORMATIONCOSMOLOGY: THEORYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a catalogue of galaxy photometric redshifts and k-corrections for the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7), available on the World Wide Web. The photometric redshifts were estimated with an artificial neural network using five ugriz bands, concentration indices and Petrosian radii in the g and r bands. We have explored our redshift estimates with different training sets, thus concluding that the best choice for improving redshift accuracy comprises the main galaxy sample (MGS), the luminous red galaxies and the galaxies of active galactic nuclei covering the redshift range 0 < z≤ 0.3. For the MGS, the photometric redshift estimates agree with the spectroscopic values within rms = 0.0227. The distribution of photometric redshifts derived in the range 0 < zphot≤ 0.6 agrees well with the model predictions. k-corrections were derived by calibration of the k-correct_v4.2 code results for the MGS with the reference-frame (z= 0.1) (g−r) colours. We adopt a linear dependence of k-corrections on redshift and (g−r) colours that provide suitable distributions of luminosity and colours for galaxies up to redshift zphot= 0.6 comparable to the results in the literature. Thus, our k-correction estimate procedure is a powerful, low computational time algorithm capable of reproducing suitable results that can be used for testing galaxy properties at intermediate redshifts using the large SDSS data base.Fil: O'Mill, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Duplancic Videla, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Garcia Lambas, Diego Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Sodré Junior, Laerte. Universidade Do Sao Paulo. Instituto Astronomia, Geofisica E Ciencias Atmosfericas. Departamento de Astronomia; BrasilOxford University Press2011-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12992O'Mill, Ana Laura; Duplancic Videla, Maria Fernanda; Garcia Lambas, Diego Rodolfo; Sodré Junior, Laerte; Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 413; 2; 5-2011; 1395-14080035-8711enginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/413/2/1395/1069970/Photometric-redshifts-and-k-corrections-for-theinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2011.18222.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:55:20Zoai:ri.conicet.gov.ar:11336/12992instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-11-12 09:55:21.029CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
title Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
spellingShingle Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
O'Mill, Ana Laura
GALAXIES: DISTANCES AND REDSHIFTS
GALAXIES: FORMATION
COSMOLOGY: THEORY
title_short Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
title_full Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
title_fullStr Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
title_full_unstemmed Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
title_sort Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7
dc.creator.none.fl_str_mv O'Mill, Ana Laura
Duplancic Videla, Maria Fernanda
Garcia Lambas, Diego Rodolfo
Sodré Junior, Laerte
author O'Mill, Ana Laura
author_facet O'Mill, Ana Laura
Duplancic Videla, Maria Fernanda
Garcia Lambas, Diego Rodolfo
Sodré Junior, Laerte
author_role author
author2 Duplancic Videla, Maria Fernanda
Garcia Lambas, Diego Rodolfo
Sodré Junior, Laerte
author2_role author
author
author
dc.subject.none.fl_str_mv GALAXIES: DISTANCES AND REDSHIFTS
GALAXIES: FORMATION
COSMOLOGY: THEORY
topic GALAXIES: DISTANCES AND REDSHIFTS
GALAXIES: FORMATION
COSMOLOGY: THEORY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a catalogue of galaxy photometric redshifts and k-corrections for the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7), available on the World Wide Web. The photometric redshifts were estimated with an artificial neural network using five ugriz bands, concentration indices and Petrosian radii in the g and r bands. We have explored our redshift estimates with different training sets, thus concluding that the best choice for improving redshift accuracy comprises the main galaxy sample (MGS), the luminous red galaxies and the galaxies of active galactic nuclei covering the redshift range 0 < z≤ 0.3. For the MGS, the photometric redshift estimates agree with the spectroscopic values within rms = 0.0227. The distribution of photometric redshifts derived in the range 0 < zphot≤ 0.6 agrees well with the model predictions. k-corrections were derived by calibration of the k-correct_v4.2 code results for the MGS with the reference-frame (z= 0.1) (g−r) colours. We adopt a linear dependence of k-corrections on redshift and (g−r) colours that provide suitable distributions of luminosity and colours for galaxies up to redshift zphot= 0.6 comparable to the results in the literature. Thus, our k-correction estimate procedure is a powerful, low computational time algorithm capable of reproducing suitable results that can be used for testing galaxy properties at intermediate redshifts using the large SDSS data base.
Fil: O'Mill, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Duplancic Videla, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Garcia Lambas, Diego Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Sodré Junior, Laerte. Universidade Do Sao Paulo. Instituto Astronomia, Geofisica E Ciencias Atmosfericas. Departamento de Astronomia; Brasil
description We present a catalogue of galaxy photometric redshifts and k-corrections for the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7), available on the World Wide Web. The photometric redshifts were estimated with an artificial neural network using five ugriz bands, concentration indices and Petrosian radii in the g and r bands. We have explored our redshift estimates with different training sets, thus concluding that the best choice for improving redshift accuracy comprises the main galaxy sample (MGS), the luminous red galaxies and the galaxies of active galactic nuclei covering the redshift range 0 < z≤ 0.3. For the MGS, the photometric redshift estimates agree with the spectroscopic values within rms = 0.0227. The distribution of photometric redshifts derived in the range 0 < zphot≤ 0.6 agrees well with the model predictions. k-corrections were derived by calibration of the k-correct_v4.2 code results for the MGS with the reference-frame (z= 0.1) (g−r) colours. We adopt a linear dependence of k-corrections on redshift and (g−r) colours that provide suitable distributions of luminosity and colours for galaxies up to redshift zphot= 0.6 comparable to the results in the literature. Thus, our k-correction estimate procedure is a powerful, low computational time algorithm capable of reproducing suitable results that can be used for testing galaxy properties at intermediate redshifts using the large SDSS data base.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/12992
O'Mill, Ana Laura; Duplancic Videla, Maria Fernanda; Garcia Lambas, Diego Rodolfo; Sodré Junior, Laerte; Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 413; 2; 5-2011; 1395-1408
0035-8711
url http://hdl.handle.net/11336/12992
identifier_str_mv O'Mill, Ana Laura; Duplancic Videla, Maria Fernanda; Garcia Lambas, Diego Rodolfo; Sodré Junior, Laerte; Photometric redshifts and K-corrections for the Sloan Digital Sky Survey Data Release 7; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 413; 2; 5-2011; 1395-1408
0035-8711
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/413/2/1395/1069970/Photometric-redshifts-and-k-corrections-for-the
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2011.18222.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.976206

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