期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 500, 期 2, 页码 2250-2263出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa3438
关键词
gravitational lensing: weak; cosmic background radiation; large-scale structure of Universe; cosmology: observations
资金
- U.S. National Science Foundation [AST-1440226, AST0965625, AST-0408698, PHY-1214379, PHY-0855887]
- Princeton University
- University of Pennsylvania
- Canada Foundation for Innovation (CFI)
- Comision Nacional de Investigacion Cientifica y Tecnologica de Chile (CONICYT)
- CFI under Compute Canada
- Government of Ontario
- Ontario Research Fund -Research Excellence
- University of Toronto
- NASA [NNX13AE56G, NNX14AB58G]
- Mishrahi Fund
- Wilkinson Fund
- Isaac Newton Trust Early Career Grant
- European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme [851274]
- STFC Ernest Rutherford Fellowship
- STFC
- NSF [AST-1814971, AST-1910021, AST-1513618, AST-1907657]
- STFC Ernest Rutherford Fellowship [ST/M004856/2]
- STFC Consolidated Grant [ST/S00033X/1]
- CONICYT [AFB-170002]
- Simons Foundation
- W. M. Keck Foundation Fund at the Institute for Advanced Study
- National Research Foundation (NRF) South Africa
- CONICYT FONDECYT grant [3170846]
- National Research Foundation of South Africa
- Government of Canada through the Department of Innovation, Science and Industry Canada
- Province of Ontario through the Ministry of Colleges and Universities
- European Research Council (ERC) [851274] Funding Source: European Research Council (ERC)
- STFC [ST/S00033X/1, 1956705, ST/M004856/2, ST/S000623/1] Funding Source: UKRI
Using data from 2014 and 2015 seasons of observation with the ACT, cosmic microwave background lensing mass maps were constructed and a novel cleaning procedure was used to remove thermal SZ contamination. The cross-spectrum between the cleaned lensing map and the BOSS CMASS galaxy sample was detected at 10 sigma significance. These results lay the foundation for future lensing cross-correlation science with ACT data.
We construct cosmic microwave background lensing mass maps using data from the 2014 and 2015 seasons of observations with the Atacama Cosmology Telescope (ACT). These maps cover 2100 square degrees of sky and overlap with a wide variety of optical surveys. The maps are signal dominated on large scales and have fidelity such that their correlation with the cosmic infrared background is clearly visible by eye. We also create lensing maps with thermal Sunyaev-Zel'dovich contamination removed using a novel cleaning procedure that only slightly degrades the lensing signal-to-noise ratio. The cross-spectrum between the cleaned lensing map and the BOSS CMASS galaxy sample is detected at 10 sigma significance, with an amplitude of A = 1.02 +/- 0.10 relative to the Planck best-fitting Lambda cold dark matter cosmological model with fiducial linear galaxy bias. Our measurement lays the foundation for lensing cross-correlation science with current ACT data and beyond.
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