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The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey quasar sample: testing observational systematics on the Baryon Acoustic Oscillation measurement
- Source :
- Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2021, 506 (2), pp.2503-2517. ⟨10.1093/mnras/stab1887⟩
- Publication Year :
- 2021
- Publisher :
- Oxford University Press (OUP), 2021.
-
Abstract
- Baryon Acoustic Oscillations are considered to be a very robust standard ruler against various systematics. This premise has been tested against observational systematics, but not to the level required for the next generation of galaxy surveys such as the Dark Energy Spectroscopic Instrument (DESI) and Euclid. In this paper, we investigate the effect of observational systematics on the BAO measurement of the final sample of quasars from the extended Baryon Oscillation Spectroscopic Survey Data Release 16 in order to prepare and hone a similar analysis for upcoming surveys. We employ catalogues with various treatments of imaging systematic effects using linear and neural network-based nonlinear approaches and consider how the BAO measurement changes. We also test how the variations to the BAO fitting model respond to the observational systematics. As expected, we confirm that the BAO measurements obtained from the DR16 quasar sample are robust against imaging systematics well within the statistical error, while reporting slightly modified constraints that shift the line-of-sight BAO signal by less than 1.1% . We use realistic simulations with similar redshift and angular distributions as the DR16 sample to conduct statistical tests for validating the pipeline, quantifying the significance of differences, and estimating the expected bias on the BAO scale in future high-precision data sets. Although we find a marginal impact for the eBOSS QSO data, the work presented here is of vital importance for constraining the nature of dark energy with the BAO feature in the new era of big data cosmology with DESI and Euclid.<br />14 pages and 16 figures, comments are welcome
- Subjects :
- Cosmology and Nongalactic Astrophysics (astro-ph.CO)
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
redshift 0.8
01 natural sciences
Cosmology
galaxies
0103 physical sciences
010303 astronomy & astrophysics
data release
Physics
010308 nuclear & particles physics
Standard ruler
Astrophysics::Instrumentation and Methods for Astrophysics
Astronomy and Astrophysics
Quasar
cosmology: distance scale
peak
Galaxy
Redshift
Baryon
Space and Planetary Science
cosmology: observations
Dark energy
digital sky survey
power-spectrum
large-scale structure of Universe
Baryon acoustic oscillations
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 506
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....e0f6af8af65ce11d374f2a91f5d7f387