Model-independent constraints on clustering and growth of cosmic structures from BOSS DR12 galaxies in harmonic space

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00636699" target="_blank" >RIV/68378271:_____/23:00636699 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0367641" target="_blank" >https://hdl.handle.net/11104/0367641</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/acbfb2" target="_blank" >10.3847/1538-4357/acbfb2</a>

Result language

angličtina

Original language name

Model-independent constraints on clustering and growth of cosmic structures from BOSS DR12 galaxies in harmonic space

Original language description

We present a new, model-independent measurement of the clustering amplitude of galaxies and the growth of cosmic large-scale structures from the Baryon Oscillation Spectroscopic Survey (BOSS) 12th data release. This is achieved by generalizing harmonic-space power spectra for galaxy clustering to measure separately the magnitudes of the density and the redshift-space distortion terms, respectively related to the clustering amplitude of structures, b sigma (8)(z), and their growth, f sigma (8)(z). We adopt a tomographic approach with 15 redshift bins in z is an element of [0.15, 0.67]. We restrict our analysis to strictly linear scales, implementing a redshift-dependent maximum multipole for each bin. The measurements do not appear to suffer from systematic effects, and they show excellent agreement with the theoretical predictions from the Planck cosmic microwave background analysis assuming a ΛCDM cosmology. Our results also agree with previous analyses by the BOSS collaboration. Furthermore, our method provides the community with a new tool for data analyses of the cosmic large-scale structure, complementary to state-of-the-art approaches in configuration or Fourier space. Among its merits, we list: it being more agnostic with respect to the underlying cosmological model, its roots in a well-defined and gauge-invariant observable, the possibility to account naturally for wide-angle effects and even relativistic corrections on ultra-large scales, and the capability to perform an almost arbitrarily fine redshift binning with little computational effort. These aspects are all the more relevant for the oncoming generation of cosmological experiments such as Euclid, the Dark Energy Spectroscopic Instrument, the Legacy Survey of Space and Time, and the SKA Project.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Cosmology, Gravity and the Dark Sector of the Universe</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

948

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

6

UT code for WoS article

000978004900001

EID of the result in the Scopus database

2-s2.0-85154621298