The extended Baryon Oscillation Spectroscopic Survey: testing a new approach to measure the evolution of the structure growth
| Autor: | Nikhil Padmanabhan, Fangzhou Zhu, Will J. Percival, Gong-Bo Zhao, Héctor Gil-Marín, Rossana Ruggeri, Eva-Maria Mueller |
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| Přispěvatelé: | Institut Lagrange de Paris, Sorbonne Université (SU), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Universités |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
photometric [methods] observational [methods] FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Measure (mathematics) Window function surveys 0103 physical sciences dark energy 010303 astronomy & astrophysics STFC Physics ST/N00180X/1 010308 nuclear & particles physics RCUK Astronomy and Astrophysics Quasar Galaxy Redshift Baryon Space and Planetary Science cosmology: observations Dark energy astro-ph.CO structure [galaxies] Baryon acoustic oscillations ST/N000668/1 large-scale structure of Universe [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2019, 484 (3), pp.4100-4112. ⟨10.1093/mnras/sty3452⟩ Mon.Not.Roy.Astron.Soc. Mon.Not.Roy.Astron.Soc., 2019, 484 (3), pp.4100-4112. ⟨10.1093/mnras/sty3452⟩ Ruggeri, R, Percival, W J, Mueller, E-M, Gil-Marin, H, Zhu, F, Padmanabhan, N & Zhao, G-B 2019, ' The extended Baryon Oscillation Spectroscopic Survey (eBOSS) : testing a new approach to measure the evolution of the structure growth ', Monthly Notices of the Royal Astronomical Society, vol. 484, no. 3, pp. 4100-4112 . https://doi.org/10.1093/mnras/sty3452 |
| ISSN: | 0035-8711 1365-2966 |
| Popis: | The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is one of the first of a new generation of galaxy redshift surveys that will cover a large range in redshift with sufficient resolution to measure the baryon acoustic oscillations (BAO) signal. For surveys covering a large redshift range we can no longer ignore cosmological evolution, meaning that either the redshift shells analysed have to be significantly narrower than the survey, or we have to allow for the averaging over evolving quantities. Both of these have the potential to remove signal: analysing small volumes increases the size of the Fourier window function, reducing the large-scale information, while averaging over evolving quantities can, if not performed carefully, remove differential information. It will be important to measure cosmological evolution from these surveys to explore and discriminate between models. We apply a method to optimally extract this differential information to mock catalogues designed to mimic the eBOSS quasar sample. By applying a set of weights to extract redshift space distortion measurements as a function of redshift, we demonstrate an analysis that does not invoke the problems discussed above. We show that our estimator gives unbiased constraints. Comment: 11 pages, 8 figures |
| Databáze: | OpenAIRE |
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