The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations

We study the large-scale clustering of galaxies in the overlap region of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS sample and the WiggleZ Dark Energy Survey. We calculate the auto-correlation and cross-correlation functions in the overlap region of the two data sets and detect a Baryo...

Descripción completa

Detalles Bibliográficos
Autores: Beutler, Florian, Blake, Chris, Koda, Jun, Marin, Felipe, Seo, Hee-Jong, Cuesta, Antonio J., Schneider, Donald P.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/117882
Acceso en línea:https://hdl.handle.net/2445/117882
Access Level:acceso abierto
Palabra clave:Cosmologia
Energia fosca (Astronomia)
Expansió de l'univers
Cosmology
Dark energy (Astronomy)
Expanding universe
id ES_ec5bcd246b9e847db8dcc979e8588cea
oai_identifier_str oai:diposit.ub.edu:2445/117882
network_acronym_str ES
network_name_str España
repository_id_str
spelling The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillationsBeutler, FlorianBlake, ChrisKoda, JunMarin, FelipeSeo, Hee-JongCuesta, Antonio J.Schneider, Donald P.CosmologiaEnergia fosca (Astronomia)Expansió de l'universCosmologyDark energy (Astronomy)Expanding universeWe study the large-scale clustering of galaxies in the overlap region of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS sample and the WiggleZ Dark Energy Survey. We calculate the auto-correlation and cross-correlation functions in the overlap region of the two data sets and detect a Baryon Acoustic Oscillation (BAO) signal in each of them. The BAO measurement from the cross-correlation function represents the first such detection between two different galaxy surveys. After applying density-field reconstruction we report distance-scale measurements D_V r_s^fid / r_s = (1970 ± 45, 2132 ± 65, 2100 ± 200) Mpc from CMASS, the cross-correlation and WiggleZ, respectively. The distance scales derived from the two data sets are consistent, and are also robust against switching the displacement fields used for reconstruction between the two surveys. We use correlated mock realizations to calculate the covariance between the three BAO constraints. This approach can be used to construct a correlation matrix, permitting for the first time a rigorous combination of WiggleZ and CMASS BAO measurements. Using a volume-scaling technique, our result can also be used to combine WiggleZ and future CMASS DR12 results. Finally, we show that the relative velocity effect, a possible source of systematic uncertainty for the BAO technique, is consistent with zero for our samplesRoyal Astronomical Society2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/117882Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1093/mnras/stv1943Monthly Notices of the Royal Astronomical Society, 2016, vol. 455, num. 3, p. 3230-3248https://doi.org/10.1093/mnras/stv1943(c) Beutler, Florian et al., 2016info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1178822026-05-27T06:46:51Z
dc.title.none.fl_str_mv The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
title The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
spellingShingle The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
Beutler, Florian
Cosmologia
Energia fosca (Astronomia)
Expansió de l'univers
Cosmology
Dark energy (Astronomy)
Expanding universe
title_short The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
title_full The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
title_fullStr The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
title_full_unstemmed The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
title_sort The BOSS-WiggleZ overlap region - I. Baryon acoustic oscillations
dc.creator.none.fl_str_mv Beutler, Florian
Blake, Chris
Koda, Jun
Marin, Felipe
Seo, Hee-Jong
Cuesta, Antonio J.
Schneider, Donald P.
author Beutler, Florian
author_facet Beutler, Florian
Blake, Chris
Koda, Jun
Marin, Felipe
Seo, Hee-Jong
Cuesta, Antonio J.
Schneider, Donald P.
author_role author
author2 Blake, Chris
Koda, Jun
Marin, Felipe
Seo, Hee-Jong
Cuesta, Antonio J.
Schneider, Donald P.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Cosmologia
Energia fosca (Astronomia)
Expansió de l'univers
Cosmology
Dark energy (Astronomy)
Expanding universe
topic Cosmologia
Energia fosca (Astronomia)
Expansió de l'univers
Cosmology
Dark energy (Astronomy)
Expanding universe
description We study the large-scale clustering of galaxies in the overlap region of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS sample and the WiggleZ Dark Energy Survey. We calculate the auto-correlation and cross-correlation functions in the overlap region of the two data sets and detect a Baryon Acoustic Oscillation (BAO) signal in each of them. The BAO measurement from the cross-correlation function represents the first such detection between two different galaxy surveys. After applying density-field reconstruction we report distance-scale measurements D_V r_s^fid / r_s = (1970 ± 45, 2132 ± 65, 2100 ± 200) Mpc from CMASS, the cross-correlation and WiggleZ, respectively. The distance scales derived from the two data sets are consistent, and are also robust against switching the displacement fields used for reconstruction between the two surveys. We use correlated mock realizations to calculate the covariance between the three BAO constraints. This approach can be used to construct a correlation matrix, permitting for the first time a rigorous combination of WiggleZ and CMASS BAO measurements. Using a volume-scaling technique, our result can also be used to combine WiggleZ and future CMASS DR12 results. Finally, we show that the relative velocity effect, a possible source of systematic uncertainty for the BAO technique, is consistent with zero for our samples
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/117882
url https://hdl.handle.net/2445/117882
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1093/mnras/stv1943
Monthly Notices of the Royal Astronomical Society, 2016, vol. 455, num. 3, p. 3230-3248
https://doi.org/10.1093/mnras/stv1943
dc.rights.none.fl_str_mv (c) Beutler, Florian et al., 2016
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Beutler, Florian et al., 2016
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Royal Astronomical Society
publisher.none.fl_str_mv Royal Astronomical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869423308142804993
score 15.300719

Similares en LA Referencia