A first model-independent radial BAO constraint from the final BOSS sample
Abstract
ABSTRACT Using almost one million galaxies from the final Data Release 12 of the SDSS’s Baryon Oscillation Spectroscopic Survey (BOSS), we have obtained, albeit with low significance, a first model-independent determination of the radial baryon acoustic oscillation (BAO) peak with 9 per cent error: ΔzBAO(zeff = 0.51) = 0.0456 ± 0.0042. In order to obtain this measurement, the radial correlation function was computed in 7700 angular pixels, from which the mean correlation function and covariance matrix were obtained, making the analysis completely model-independent. This novel method of obtaining the covariance matrix was validated via comparison with 500 BOSS mock catalogues. This ΔzBAO determination can be used to constrain the background expansion of exotic models for which the assumptions adopted in the standard analysis cannot be satisfied. Future galaxy catalogues from J-PAS, DESI, and Euclid are expected to significantly increase the quality and significance of model-independent determinations of the BAO peak, possibly determined at various redshift and angular positions. We stress that it is imperative to test the standard paradigm in a model-independent way in order to test its foundations, maximize the extraction of information from the data, and look for clues regarding the poorly understood dark energy and dark matter.
- Authors:
-
[1];
- Núcleo Cosmo-ufes & Departamento de Física, Universidade Federal do Espírito Santo, 29075-910 Vitória, ES, Brazil
- PPGFis, Universidade Federal do Espírito Santo, 29075-910 Vitória, ES, Brazil
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1632212
- Alternate Identifier(s):
- OSTI ID: 1577632
- Grant/Contract Number:
- CSD2009-00064; AYA2014-60641-C2- 1-P; SEV- 2012-0249
- Resource Type:
- Published Article
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 487 Journal Issue: 3; Journal ID: ISSN 0035-8711
- Publisher:
- Oxford University Press
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Observational Cosmology; Large Scale Structure; BAO
Citation Formats
Marra, Valerio, and Chirinos Isidro, Eddy G. A first model-independent radial BAO constraint from the final BOSS sample. United Kingdom: N. p., 2019.
Web. doi:10.1093/mnras/stz1557.
Marra, Valerio, & Chirinos Isidro, Eddy G. A first model-independent radial BAO constraint from the final BOSS sample. United Kingdom. https://doi.org/10.1093/mnras/stz1557
Marra, Valerio, and Chirinos Isidro, Eddy G. Thu .
"A first model-independent radial BAO constraint from the final BOSS sample". United Kingdom. https://doi.org/10.1093/mnras/stz1557.
@article{osti_1632212,
title = {A first model-independent radial BAO constraint from the final BOSS sample},
author = {Marra, Valerio and Chirinos Isidro, Eddy G.},
abstractNote = {ABSTRACT Using almost one million galaxies from the final Data Release 12 of the SDSS’s Baryon Oscillation Spectroscopic Survey (BOSS), we have obtained, albeit with low significance, a first model-independent determination of the radial baryon acoustic oscillation (BAO) peak with 9 per cent error: ΔzBAO(zeff = 0.51) = 0.0456 ± 0.0042. In order to obtain this measurement, the radial correlation function was computed in 7700 angular pixels, from which the mean correlation function and covariance matrix were obtained, making the analysis completely model-independent. This novel method of obtaining the covariance matrix was validated via comparison with 500 BOSS mock catalogues. This ΔzBAO determination can be used to constrain the background expansion of exotic models for which the assumptions adopted in the standard analysis cannot be satisfied. Future galaxy catalogues from J-PAS, DESI, and Euclid are expected to significantly increase the quality and significance of model-independent determinations of the BAO peak, possibly determined at various redshift and angular positions. We stress that it is imperative to test the standard paradigm in a model-independent way in order to test its foundations, maximize the extraction of information from the data, and look for clues regarding the poorly understood dark energy and dark matter.},
doi = {10.1093/mnras/stz1557},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 487,
place = {United Kingdom},
year = {Thu Jun 06 00:00:00 EDT 2019},
month = {Thu Jun 06 00:00:00 EDT 2019}
}
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https://doi.org/10.1093/mnras/stz1557
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Cited by: 6 works
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Works referencing / citing this record:
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