KiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensing
We present the tomographic cross-correlation between galaxy lensing measured in the Kilo Degree Survey (KiDS-450) with overlapping lensing measurements of the cosmic microwave background (CMB), as detected by Planck 2015. We compare our joint probe measurement to the theoretical expectation for a fl...
| Autores principales: | , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Journal article |
| Publicado: |
Oxford University Press
2017
|
| _version_ | 1826305129149628416 |
|---|---|
| author | Harnois-Déraps, J Tröster, T Chisari, NE Heymans, C Waerbeke, LV Asgari, M Bilicki, M Choi, A Hildebrandt, H Hoekstra, H Joudaki, S Kuijken, K Merten, J Miller, L Robertson, NC Schneider, P Viola, M |
| author_facet | Harnois-Déraps, J Tröster, T Chisari, NE Heymans, C Waerbeke, LV Asgari, M Bilicki, M Choi, A Hildebrandt, H Hoekstra, H Joudaki, S Kuijken, K Merten, J Miller, L Robertson, NC Schneider, P Viola, M |
| author_sort | Harnois-Déraps, J |
| collection | OXFORD |
| description | We present the tomographic cross-correlation between galaxy lensing measured in the Kilo Degree Survey (KiDS-450) with overlapping lensing measurements of the cosmic microwave background (CMB), as detected by Planck 2015. We compare our joint probe measurement to the theoretical expectation for a flat $\Lambda$CDM cosmology, assuming the best-fitting cosmological parameters from the KiDS-450 cosmic shear and Planck CMB analyses. We find that our results are consistent within $1\sigma$ with the KiDS-450 cosmology, with an amplitude re-scaling parameter $A_{\rm KiDS} = 0.86 \pm 0.19$. Adopting a Planck cosmology, we find our results are consistent within $2\sigma$, with $A_{\it Planck} = 0.68 \pm 0.15$. We show that the agreement is improved in both cases when the contamination to the signal by intrinsic galaxy alignments is accounted for, increasing $A$ by $\sim 0.1$. This is the first tomographic analysis of the galaxy lensing -- CMB lensing cross-correlation signal, and is based on five photometric redshift bins. We use this measurement as an independent validation of the multiplicative shear calibration and of the calibrated source redshift distribution at high redshifts. We find that constraints on these two quantities are strongly correlated when obtained from this technique, which should therefore not be considered as a stand-alone competitive calibration tool. |
| first_indexed | 2024-03-07T06:28:11Z |
| format | Journal article |
| id | oxford-uuid:f50bee10-c20e-4265-ab2f-4a5ba81cc637 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:28:11Z |
| publishDate | 2017 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:f50bee10-c20e-4265-ab2f-4a5ba81cc6372022-03-27T12:24:21ZKiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f50bee10-c20e-4265-ab2f-4a5ba81cc637Symplectic Elements at OxfordOxford University Press2017Harnois-Déraps, JTröster, TChisari, NEHeymans, CWaerbeke, LVAsgari, MBilicki, MChoi, AHildebrandt, HHoekstra, HJoudaki, SKuijken, KMerten, JMiller, LRobertson, NCSchneider, PViola, MWe present the tomographic cross-correlation between galaxy lensing measured in the Kilo Degree Survey (KiDS-450) with overlapping lensing measurements of the cosmic microwave background (CMB), as detected by Planck 2015. We compare our joint probe measurement to the theoretical expectation for a flat $\Lambda$CDM cosmology, assuming the best-fitting cosmological parameters from the KiDS-450 cosmic shear and Planck CMB analyses. We find that our results are consistent within $1\sigma$ with the KiDS-450 cosmology, with an amplitude re-scaling parameter $A_{\rm KiDS} = 0.86 \pm 0.19$. Adopting a Planck cosmology, we find our results are consistent within $2\sigma$, with $A_{\it Planck} = 0.68 \pm 0.15$. We show that the agreement is improved in both cases when the contamination to the signal by intrinsic galaxy alignments is accounted for, increasing $A$ by $\sim 0.1$. This is the first tomographic analysis of the galaxy lensing -- CMB lensing cross-correlation signal, and is based on five photometric redshift bins. We use this measurement as an independent validation of the multiplicative shear calibration and of the calibrated source redshift distribution at high redshifts. We find that constraints on these two quantities are strongly correlated when obtained from this technique, which should therefore not be considered as a stand-alone competitive calibration tool. |
| spellingShingle | Harnois-Déraps, J Tröster, T Chisari, NE Heymans, C Waerbeke, LV Asgari, M Bilicki, M Choi, A Hildebrandt, H Hoekstra, H Joudaki, S Kuijken, K Merten, J Miller, L Robertson, NC Schneider, P Viola, M KiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensing |
| title | KiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensing |
| title_full | KiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensing |
| title_fullStr | KiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensing |
| title_full_unstemmed | KiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensing |
| title_short | KiDS-450: Tomographic cross-correlation of galaxy shear with Planck lensing |
| title_sort | kids 450 tomographic cross correlation of galaxy shear with planck lensing |
| work_keys_str_mv | AT harnoisderapsj kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT trostert kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT chisarine kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT heymansc kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT waerbekelv kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT asgarim kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT bilickim kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT choia kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT hildebrandth kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT hoekstrah kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT joudakis kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT kuijkenk kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT mertenj kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT millerl kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT robertsonnc kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT schneiderp kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing AT violam kids450tomographiccrosscorrelationofgalaxyshearwithplancklensing |