Dark energy survey year 3 results: cosmology from galaxy clustering and galaxy–galaxy lensing in harmonic space

We present the joint tomographic analysis of galaxy-galaxy lensing and galaxy clustering in harmonic space (HS), using galaxy catalogues from the first three years of observations by the Dark Energy Survey (DES Y3). We utilize the redMaGiC and MagLim catalogues as lens galaxies and the metacalibration catalogue as source galaxies. The measurements of angular power spectra are performed using the pseudo-Cℓ method, and our theoretical modelling follows the fiducial analyses performed by DES Y3 in configuration space, accounting for galaxy bias, intrinsic alignments, magnification bias, shear magnification bias and photometric redshift uncertainties. We explore different approaches for scale cuts based on non-linear galaxy bias and baryonic effects contamination. Our fiducial covariance matrix is computed analytically, accounting for mask geometry in the Gaussian term, and including non-Gaussian contributions and super-sample covariance terms. To validate our HS pipelines and covariance matrix, we used a suite of 1800 log-normal simulations. We also perform a series of stress tests to gauge the robustness of our HS analysis. In the ΛCDM model, the clustering amplitude S8=σ8(Ωm/0.3)0.5 is constrained to S8=0.704±0.029 and S8=0.753±0.024 (68 per cent C.L.) for the redMaGiC and MagLim catalogues, respectively. For the wCDM, the dark energy equation of state is constrained to w=−1.28±0.29 and w=−1.26−0.27+0.34⁠, for redMaGiC and MagLim catalogues, respectively. These results are compatible with the corresponding DES Y3 results in configuration space and pave the way for HS analyses using the DES Y6 data.

Note:

To be submitted to MNRAS

(cosmology:) cosmological parameters
(cosmology:) large-scale structure of Universe
gravitational lensing: weak

References(269)

Figures(28)

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory

eBOSS

Collaboration

•

Shadab Alam
(
- Edinburgh U.
)

et al.

- Phys.Rev.D 103 (2021) 8, 083533
•
e-Print:
- 2007.08991
•
DOI:
- 10.1103/PhysRevD.103.083533

A unified pseudo- $C_\ell$ framework

LSST Dark Energy Science

Collaboration

•

David Alonso
(
- Cardiff U. and
- Oxford U.
)

et al.

- Mon.Not.Roy.Astron.Soc. 484 (2019) 3, 4127-4151
•
e-Print:
- 1809.09603
•
DOI:
- 10.1093/mnras/stz093

Galaxy Clustering in Harmonic Space from the Dark Energy Survey Year 1 Data: Compatibility with Real-Space Results

DES

Collaboration

•

F. Andrade-Oliveira
(
- Sao Paulo, IFT and
- LIneA, Rio de Janeiro
)

et al.

- Mon.Not.Roy.Astron.Soc. 505 (2021) 4, 5714-5724
•
e-Print:
- 2103.14190
•
DOI:
- 10.1093/mnras/stab1642

KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics

KiDS

Collaboration

•

Marika Asgari
(
- Edinburgh U., Inst. Astron.
)

et al.

- Astron.Astrophys. 645 (2021) A104
•
e-Print:
- 2007.15633
•
DOI:
- 10.1051/0004-6361/202039070

An algorithm for the direct reconstruction of the dark matter correlation function from weak lensing and galaxy clustering

Tobias Baldauf
(
- Zurich U.
)
,
Robert E. Smith
(
- Zurich U.
)
,
Uros Seljak
(
- Zurich U. and
- UC, Berkeley and
- Ewha Women's U., Seoul
)
,
Rachel Mandelbaum
(
- Princeton U.
)

- Phys.Rev.D 81 (2010) 063531
•
e-Print:
- 0911.4973
•
DOI:
- 10.1103/PhysRevD.81.063531

Beyond linear galaxy alignments

- Phys.Rev.D 100 (2019) 10, 103506
•
e-Print:
- 1708.09247
•
DOI:
- 10.1103/PhysRevD.100.103506

Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements

- New J.Phys. 9 (2007) 444
•
e-Print:
- 0705.0166
•
DOI:
- 10.1088/1367-2630/9/12/444

CMB temperature and polarisation pseudo-C(l) estimators and covariances

- Mon.Not.Roy.Astron.Soc. 360 (2005) 1262-1280
•
e-Print:
- astro-ph/0410394
•
DOI:
- 10.1111/j.1365-2966.2005.09111.x

Cosmic shear in harmonic space from the Dark Energy Survey Year 1 Data: compatibility with configuration space results

DES

Collaboration

•

H. Camacho
(
- Sao Paulo, IFT and
- LIneA, Rio de Janeiro
)

et al.

- Mon.Not.Roy.Astron.Soc. 516 (2022) 4, 5799-5815
•
e-Print:
- 2111.07203
•
DOI:
- 10.1093/mnras/stac2543

Dark Energy Survey Year 3 results: calibration of lens sample redshift distributions using clustering redshifts with BOSS/eBOSS

DES and
eBOSS

Collaborations

•

R. Cawthon
(
- Wisconsin U., Madison
)

et al.

- Mon.Not.Roy.Astron.Soc. 513 (2022) 4, 5517-5539,
- Mon.Not.Roy.Astron.Soc. 513 (2022) 5517
•
e-Print:
- 2012.12826
•
DOI:
- 10.1093/mnras/stac1160