Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000
We measured the cross-correlation between galaxy weak lensing data from the Kilo Degree Survey (KiDS-1000, DR4) and cosmic microwave background (CMB) lensing data from the Atacama Cosmology Telescope (ACT, DR4) and the Planck Legacy survey. We used two samples of source galaxies, selected with photo...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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EDP Sciences
2021
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| _version_ | 1797065907323797504 |
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| author | Robertson, NC Alonso, D Harnois-Déraps, J Darwish, O Kannawadi, A Amon, A Asgari, M Bilicki, M Calabrese, E Choi, SK Devlin, MJ Dunkley, J Dvornik, A Erben, T Ferraro, S Fortuna, MC Giblin, B Han, D Heymans, C Hildebrandt, H Hill, JC Hilton, M Ho, S-PP Hoekstra, H Hubmayr, J Hughes, JP Joachimi, B Joudaki, S Knowles, K Kuijken, K Madhavacheril, MS Moodley, K Miller, L Namikawa, T Nati, F Niemack, MD Page, LA Partridge, B Schaan, E Schillaci, A Schneider, P Sehgal, N Sherwin, BD Sifón, C Staggs, ST Tröster, T van Engelen, A Valentijn, E Wollack, EJ Wright, AH |
| author_facet | Robertson, NC Alonso, D Harnois-Déraps, J Darwish, O Kannawadi, A Amon, A Asgari, M Bilicki, M Calabrese, E Choi, SK Devlin, MJ Dunkley, J Dvornik, A Erben, T Ferraro, S Fortuna, MC Giblin, B Han, D Heymans, C Hildebrandt, H Hill, JC Hilton, M Ho, S-PP Hoekstra, H Hubmayr, J Hughes, JP Joachimi, B Joudaki, S Knowles, K Kuijken, K Madhavacheril, MS Moodley, K Miller, L Namikawa, T Nati, F Niemack, MD Page, LA Partridge, B Schaan, E Schillaci, A Schneider, P Sehgal, N Sherwin, BD Sifón, C Staggs, ST Tröster, T van Engelen, A Valentijn, E Wollack, EJ Wright, AH |
| author_sort | Robertson, NC |
| collection | OXFORD |
| description | We measured the cross-correlation between galaxy weak lensing data from the Kilo Degree Survey (KiDS-1000, DR4) and cosmic microwave background (CMB) lensing data from the Atacama Cosmology Telescope (ACT, DR4) and the Planck Legacy survey. We used two samples of source galaxies, selected with photometric redshifts, (0.1 < zB < 1.2) and (1.2 < zB < 2), which produce a combined detection significance of the CMB lensing and weak galaxy lensing cross-spectrum of 7.7σ. With the lower redshift galaxy sample, for which the cross-correlation was detected at a significance of 5.3σ, we present joint cosmological constraints on the matter density parameter, Ωm, and the matter fluctuation amplitude parameter, σ8, marginalising over three nuisance parameters that model our uncertainty in the redshift and shear calibration as well as the intrinsic alignment of galaxies. We find our measurement to be consistent with the best-fitting flat ΛCDM cosmological models from both Planck and KiDS-1000. We demonstrate the capacity of CMB weak lensing cross-correlations to set constraints on either the redshift or shear calibration by analysing a previously unused high-redshift KiDS galaxy sample (1.2 < zB < 2), with the cross-correlation detected at a significance of 7σ. This analysis provides an independent assessment for the accuracy of redshift measurements in a regime that is challenging to calibrate directly owing to known incompleteness in spectroscopic surveys. |
| first_indexed | 2024-03-06T21:35:01Z |
| format | Journal article |
| id | oxford-uuid:45f1786a-9534-4db2-883a-4cb8d7c1bfa6 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:35:01Z |
| publishDate | 2021 |
| publisher | EDP Sciences |
| record_format | dspace |
| spelling | oxford-uuid:45f1786a-9534-4db2-883a-4cb8d7c1bfa62022-03-26T15:10:54ZStrong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:45f1786a-9534-4db2-883a-4cb8d7c1bfa6EnglishSymplectic ElementsEDP Sciences2021Robertson, NCAlonso, DHarnois-Déraps, JDarwish, OKannawadi, AAmon, AAsgari, MBilicki, MCalabrese, EChoi, SKDevlin, MJDunkley, JDvornik, AErben, TFerraro, SFortuna, MCGiblin, BHan, DHeymans, CHildebrandt, HHill, JCHilton, MHo, S-PPHoekstra, HHubmayr, JHughes, JPJoachimi, BJoudaki, SKnowles, KKuijken, KMadhavacheril, MSMoodley, KMiller, LNamikawa, TNati, FNiemack, MDPage, LAPartridge, BSchaan, ESchillaci, ASchneider, PSehgal, NSherwin, BDSifón, CStaggs, STTröster, Tvan Engelen, AValentijn, EWollack, EJWright, AHWe measured the cross-correlation between galaxy weak lensing data from the Kilo Degree Survey (KiDS-1000, DR4) and cosmic microwave background (CMB) lensing data from the Atacama Cosmology Telescope (ACT, DR4) and the Planck Legacy survey. We used two samples of source galaxies, selected with photometric redshifts, (0.1 < zB < 1.2) and (1.2 < zB < 2), which produce a combined detection significance of the CMB lensing and weak galaxy lensing cross-spectrum of 7.7σ. With the lower redshift galaxy sample, for which the cross-correlation was detected at a significance of 5.3σ, we present joint cosmological constraints on the matter density parameter, Ωm, and the matter fluctuation amplitude parameter, σ8, marginalising over three nuisance parameters that model our uncertainty in the redshift and shear calibration as well as the intrinsic alignment of galaxies. We find our measurement to be consistent with the best-fitting flat ΛCDM cosmological models from both Planck and KiDS-1000. We demonstrate the capacity of CMB weak lensing cross-correlations to set constraints on either the redshift or shear calibration by analysing a previously unused high-redshift KiDS galaxy sample (1.2 < zB < 2), with the cross-correlation detected at a significance of 7σ. This analysis provides an independent assessment for the accuracy of redshift measurements in a regime that is challenging to calibrate directly owing to known incompleteness in spectroscopic surveys. |
| spellingShingle | Robertson, NC Alonso, D Harnois-Déraps, J Darwish, O Kannawadi, A Amon, A Asgari, M Bilicki, M Calabrese, E Choi, SK Devlin, MJ Dunkley, J Dvornik, A Erben, T Ferraro, S Fortuna, MC Giblin, B Han, D Heymans, C Hildebrandt, H Hill, JC Hilton, M Ho, S-PP Hoekstra, H Hubmayr, J Hughes, JP Joachimi, B Joudaki, S Knowles, K Kuijken, K Madhavacheril, MS Moodley, K Miller, L Namikawa, T Nati, F Niemack, MD Page, LA Partridge, B Schaan, E Schillaci, A Schneider, P Sehgal, N Sherwin, BD Sifón, C Staggs, ST Tröster, T van Engelen, A Valentijn, E Wollack, EJ Wright, AH Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000 |
| title | Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000 |
| title_full | Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000 |
| title_fullStr | Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000 |
| title_full_unstemmed | Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000 |
| title_short | Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000 |
| title_sort | strong detection of the cmb lensing and galaxy weak lensing cross correlation from act dr4 planck legacy and kids 1000 |
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