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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Kosmologie, gravitace a temný sektor vesmíru</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

948

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

6

Kód UT WoS článku

000978004900001

EID výsledku v databázi Scopus

2-s2.0-85154621298