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Cross-correlation between cosmological and astrophysical datasets: the Planck and Herschel case
- Source :
- Proceedings of the International Astronomical Union. 10:202-205
- Publication Year :
- 2014
- Publisher :
- Cambridge University Press (CUP), 2014.
-
Abstract
- We present the first measurement of the correlation between the map of the CMB lensing potential derived from the Planck nominal mission data and z ≳ 1.5 galaxies detected by Herschel-ATLAS (H-ATLAS) survey covering about 550 deg2. We detect the cross-power spectrum with a significance of ∼ 8.5σ, ruling out the absence of correlation at 9σ. We check detection with a number of null tests. The amplitude of cross-correlation and the galaxy bias are estimated using joint analysis of the cross-power spectrum and the galaxy survey auto-spectrum, which allows to break degeneracy between these parameters. The estimated galaxy bias is consistent with previous estimates of the bias for the H-ATLAS data, while the cross-correlation amplitude is higher than expected for a ΛCDM model. The content of this work is to appear in a forthcoming paper Bianchini, et al. (2014).
- Subjects :
- Physics
gravitational lensing
Cosmic microwave background
Dark matter
cosmology: cosmic microwave background
Astronomy
Astronomy and Astrophysics
Lambda-CDM model
Astrophysics
methods: data analysis
Galaxy
Redshift-space distortions
Gravitational lens
Settore FIS/05 - Astronomia e Astrofisica
galaxies: high-redshift
Space and Planetary Science
Observational cosmology
Weak gravitational lensing
Subjects
Details
- ISSN :
- 17439221 and 17439213
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Proceedings of the International Astronomical Union
- Accession number :
- edsair.doi.dedup.....8ba874e97c7d88eb4b6bafa2f9ebe984