Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>P</mml:mi><mml:mi>l</mml:mi><mml:mi>a</mml:mi><mml:mi>n</mml:mi><mml:mi>c</mml:mi><mml:mi>k</mml:mi></mml:mrow></mml:math> . II. Cross-correlation measurements and cosmological constraints

Cross-correlations of galaxy positions and shears with maps gravitational lensing the cosmic microwave background (CMB) are sensitive to distribution large-scale structure in Universe. Such cross-correlations also expected be immune some systematic effects that complicate correlation measurements internal surveys. We present modeling between measured first three years data from Dark Energy Survey CMB derived a combination 2500 deg2 SPT-SZ survey conducted South Pole Telescope full-sky Planck satellite. The used this analysis have been constructed way minimizes biases thermal Sunyaev Zel’dovich effect, making them well suited for cross-correlation studies. total signal-to-noise is 23.9 (25.7) when using choice angular scales optimized linear (nonlinear) bias model. use obtain constraints on cosmological parameters. For our fiducial sample, which consist four bins magnitude-selected galaxies, we find Ωm=0.272−0.052+0.032 S8≡σ8Ωm/0.3=0.736−0.028+0.032 (Ωm=0.245−0.044+0.026 S8=0.734−0.028+0.035) assuming modeling. Considering only shear lensing, Ωm=0.270−0.061+0.043 S8=0.740−0.029+0.034. Our S8 consistent recent measurements, but lower than values preferred by primary Planck.12 MoreReceived 4 April 2022Accepted 30 September 2022DOI:https://doi.org/10.1103/PhysRevD.107.023530© 2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasCosmic backgroundCosmological parametersLarge scale UniverseGravitation, Cosmology & Astrophysics