Correlation of CMB with large-scale structure. II. Weak lensing

By C. Hirata, Shirley Ho, Nikhil Padmanabhan, Uros Seljak, N. Bahcall. 2008

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We investigate the correlation of gravitational lensing of the cosmic microwave background (CMB) with several tracers of large-scale structure, including luminous red galaxies (LRGs), quasars, and radio Sources. The lensing field is reconstructed based on the CMB maps from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite; the LRGs and quasars are observed by the Sloan Digital Sky Survey (SDSS); and the radio sources are observed in the NRAO VLA Sky Survey (NVSS). Combining all three large-scale Structure samples, we find evidence for a positive cross correlation at the 2.5 sigma level (1.8 sigma for the SDSS samples and 2.1 sigma for NVSS); the cross correlation amplitude is 1.06 +/- 0.42 times that expected for the WMAP cosmological parameters. Our analysis extends other recent analyses in that we carefully determine bias-weighted redshift distribution of the Sources. which is needed for a meaningful cosmological interpretation of the detected signal. We investigate contamination of the signal by galactic emission, extragalactic radio and infrared sources, thermal and kinetic Sunyaev-Zel'dovich effects, and the Rees-Sciama effect, and find all of them to be negligible.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/a51a5317d23beff7bf43f3d34341d7c68e00f118

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Citations in the corpus

Observational probes of cosmic acceleration (2012, methodology): “The signal was detected three years later with combinations of SDSS and NVSS data, and two additional years of WMAP data (Smith et al., 2007; Hirata et al., 2008).”
The Quest for B Modes from Inflationary Gravitational Waves (2015, methodology): “…of lensing of the WMAP temperature map were discovered through cross-correlation with the NVSS radio survey (Smith, Zahn & Dore 2007) and several other tracers of the mass distribution (Hirata et al. 2008) and then through autocorrelation in ACT (Das et al. 2011) and SPT (van Engelen et al. 2012).”
A MEASUREMENT OF THE DAMPING TAIL OF THE COSMIC MICROWAVE BACKGROUND POWER SPECTRUM WITH THE SOUTH POLE TELESCOPE (2011, methodology): “Previous efforts to detect lensing of the CMB include ∼3σ detections from correlating quadratic reconstructions of the lensing field from the CMB with other mass tracers (Smith et al. 2007; Hirata et al. 2008), .”
Galileon gravity in light of ISW, CMB, BAO and H0 data (2017, result): “This positiveness of the ISW effect is in line with various pieces of observational evidence [24, 70].”
The Atacama Cosmology Telescope: temperature and gravitational lensing power spectrum measurements from three seasons of data (2013, background): “Signatures of CMB lensing were ﬁrst observed in correlations of the CMB with large-scale struc-18 S. Das et al. ture (Smith et al. 2007; Hirata et al. 2008).”
PRISM (Polarized Radiation Imaging and Spectroscopy Mission): an extended white paper (2013, background): “ndPRISM, respectively. A similar quality reconstruction will be obtained withPRISM over nearly the full sky. Cross-correlating CMB lensing with other probes of large-scale structure, such as galaxies [20,80,95, 163,196,198], the Lyforest [212] or CIB clustering [86,96,164] (see also Sec.4), also has”
The pre-launch Planck Sky Model: a model of sky emission at submillimetre to centimetre wavelengths (2012, methodology): “A96, page 8 of 35 Weak lensing of CMB anisotropies by large-scale structure (LSS) has been measured on WMAP data by cross-correlation with the NRAO VLA Sky Survey (NVSS), used as a high-redshift radio galaxy catalogue (Smith et al. 2007), as well as in a combined analysis with SDDS and NVSS (Hirata ”
Delensing CMB polarization with external datasets (2010, methodology): “Lens reconstruction from temperature has been applied to detect CMB lensing in WMAP, in crosscorrelation with large-scale structure [46, 47] and is expected to be a powerful source of cosmological information in the near future [48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59].”
A MEASUREMENT OF GRAVITATIONAL LENSING OF THE MICROWAVE BACKGROUND USING SOUTH POLE TELESCOPE DATA (2012, methodology): “This resulted in a detection of the signature of CMB lensing at 3.4σ. Similarly, Hirata et al. (2008) found a 2.5σ detection of cross-correlation between their lensing map, obtained with the third-year WMAP release using a slightly different estimator, and data from both the Sloan Digital Sky…”