The Atacama Cosmology Telescope: Lensing of CMB Temperature and Polarization Derived From Cosmic Infrared Background Cross-Correlation

Engelen, Alexander van; Sherwin, Blake D.; Sehgal, Neelima; Addison, Graeme E.; Allison, Rupert; Battaglia, Nick; Bernardis, Francesco De; Bond, J. R.; Calabrese, E.; Coughlin, Kevin; Crichton, Devin; Datta, Rahul; Devlin, Mark J.; Dunkley, Joanna; Dünner, Rolando; Gallardo, Patricio A.; Grace, E.; Gralla, Megan; Hajian, Amir; Hasselfield, Matthew; Henderson, S.; Hill, J. Colin; Hilton, Matthew; Hincks, Adam D.; Hložek, Renée; Huffenberger, K. M.; Hughes, John P.; Koopman, Brian J.; Kosowsky, Arthur; Louis, Thibaut; Lungu, Marius; Madhavacheril, Mathew S.; Maurin, Loïc; McMahon, Jeff; Moodley, Kavilan; Munson, Charles; Næss, Sigurd; Nati, F.; Newburgh, Laura; Niemack, Michael D.; Nolta, Michael R.; Page, Lyman A.; Pappas, Christine G.; Partridge, B.; Schmitt, Benjamin L.; Sievers, Jonathan; Simon, Sara M.; Spergel, David N.; Staggs, Suzanne T.; Switzer, Eric R.; Ward, Jennifer E.; Wollack, Edward J.

doi:10.1088/0004-637x/808/1/7

Cited by 85 publications

(77 citation statements)

References 95 publications

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“…The SPT team have reported a 7.7σ detection of lens-induced B-mode polarization based on the EBφ CIB 3-point function, where φ CIB is a proxy for the CMB lensing potential φ derived from CIB measurements ). The POLARBEAR collaboration (POLARBEAR Collaboration 2014b) and the ACT collaboration (van Engelen et al 2015) have performed similar analyses at somewhat lower significance (POLARBEAR Collaboration 2014b). In addition, the first detections of the polarization 4-point function from lensing, at a significance of around 4σ, have been reported by the POLARBEAR (Ade et al 2014) and SPT (Story et al 2015) collaborations, and the former have also made a direct measurement of the BB power spectrum due to lensing on small angular scales with a significance around 2σ (POLARBEAR Collaboration 2014a).…”

Section: Cmb Lensing Measured By Planckmentioning

confidence: 96%

Planck2015 results

Ade

Aghanim

Arnaud

et al. 2016

A&A

9,488

226

3,990

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This paper presents cosmological results based on full-mission Planck observations of temperature and polarization anisotropies of the cosmic microwave background (CMB) radiation. Our results are in very good agreement with the 2013 analysis of the Planck nominal-mission temperature data, but with increased precision. The temperature and polarization power spectra are consistent with the standard spatially-flat 6-parameter ΛCDM cosmology with a power-law spectrum of adiabatic scalar perturbations (denoted "base ΛCDM" in this paper). From the Planck temperature data combined with Planck lensing, for this cosmology we find a Hubble constant, H 0 = (67.8 ± 0.9) km s −1 Mpc −1 , a matter density parameter Ω m = 0.308 ± 0.012, and a tilted scalar spectral index with n s = 0.968 ± 0.006, consistent with the 2013 analysis. Note that in this abstract we quote 68% confidence limits on measured parameters and 95% upper limits on other parameters. We present the first results of polarization measurements with the Low Frequency Instrument at large angular scales. Combined with the Planck temperature and lensing data, these measurements give a reionization optical depth of τ = 0.066 ± 0.016, corresponding to a reionization redshift of z re = 8.8+1.7 −1.4 . These results are consistent with those from WMAP polarization measurements cleaned for dust emission using 353-GHz polarization maps from the High Frequency Instrument. We find no evidence for any departure from base ΛCDM in the neutrino sector of the theory; for example, combining Planck observations with other astrophysical data we find N eff = 3.15 ± 0.23 for the effective number of relativistic degrees of freedom, consistent with the value N eff = 3.046 of the Standard Model of particle physics. The sum of neutrino masses is constrained to m ν < 0.23 eV. The spatial curvature of our Universe is found to be very close to zero, with |Ω K | < 0.005. Adding a tensor component as a single-parameter extension to base ΛCDM we find an upper limit on the tensor-to-scalar ratio of r 0.002 < 0.11, consistent with the Planck 2013 results and consistent with the B-mode polarization constraints from a joint analysis of BICEP2, Keck Array, and Planck (BKP) data. Adding the BKP B-mode data to our analysis leads to a tighter constraint of r 0.002 < 0.09 and disfavours inflationary models with a V(φ) ∝ φ 2 potential. The addition of Planck polarization data leads to strong constraints on deviations from a purely adiabatic spectrum of fluctuations. We find no evidence for any contribution from isocurvature perturbations or from cosmic defects. Combining Planck data with other astrophysical data, including Type Ia supernovae, the equation of state of dark energy is constrained to w = −1.006 ± 0.045, consistent with the expected Corresponding author: G. Efstathiou, e-mail: gpe@ast.cam.ac.ukArticle published by EDP Sciences A13, page 1 of 63 A&A 594, A13 (2016) value for a cosmological constant. The standard big bang nucleosynthesis predictions for the helium and deuterium abundanc...

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Section: Cmb Lensing Measured By Planckmentioning

confidence: 96%

Planck2015 results

Ade

Aghanim

Arnaud

et al. 2016

A&A

9,488

226

3,990

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show abstract

“…Equipped with a new polarization sensitive receiver, ACTpol [62] and observing at 146 GHZ, ACT has detected [63] gravitational lensing of the CMB polarization by large-scale structure at a statistical significance of 4.1 σ from polarization data and at 9.1 σ combining temperature and polarization data. A B-mode polarization lensing signal is reported with a significance of 3.2 σ.…”

Section: Other Experimentsmentioning

confidence: 99%

BICEP2, Planck, spinorial space-time, pre-Big Bang.

Gonzalez‐Mestres

2015

EPJ Web of Conferences

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Abstract. The field of Cosmology is currently undergoing a positive and constructive crisis. Controversies concerning inflation are not really new. But after the 2013-2014 Planck and BICEP2 announcements, and the more recent joint analysis by Planck, BICEP2 and the Keck Array (PBKA), the basic issues can involve more direct links between the Mathematical Physics aspects of cosmological patterns and the interpretation of experimental results. Open questions and new ideas on the foundations of Cosmology can emerge, while future experimental and observational programs look very promising. The BICEP2 result reporting an excess of B-mode polarization signal of the cosmic microwave background (CMB) radiation was initially presented as a signature of primordial gravitational waves from cosmic inflation. But polarized dust emission can be at the origin of such a signal, and the evidence claimed by BICEP2 is no longer secure after the PBKA analysis. Furthermore, even assuming that significant CMB B-mode polarization has indeed been generated by the early Universe, its theoretical and cosmological interpretation would be far from obvious. Inflationary gravitational waves are not the only possible source of primordial CMB B-modes. Alternative cosmologies such as pre-Big Bang patterns and the spinorial space-time (SST) we introduced in 1996-97 can naturally produce this polarization. Furthermore, the SST automatically generates for each comoving observer a local privileged space direction (PSD) whose existence may have been confirmed by Planck data. If such a PSD exists, vector perturbations have most likely been strong in the early Universe and may have produced CMB B-modes. Pre-Big Bang cosmologies can also generate gravitational waves in the early Universe without inflation. After briefly describing detectors devoted to the study of the CMB polarization, we discuss the situation emerging from BICEP2 results, Planck results and the PBKA analysis. In particular, we further analyze possible alternatives to the inflationary interpretation of a primordial B-mode polarization of cosmic microwave background radiation.

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“…It is a practical example of real synergy between overlapping surveys, where combining probes leads to improved systematics and not just a marginally higher signal-tonoise ratio. CMB lensing has been measured by the WMAP satellite [39,40], the Atacama Cosmology Telescope (ACT) [41][42][43][44], the South Pole Telescope (SPT) [45][46][47], POLARBEAR [48], the Planck satellite [49,50], and the BICEP 2/Keck Array [51]. In the future, Advanced ACT [52], SPT-3G [53], and a stage 4 ground-based CMB experiment (CMB S4) [54,55], as well as the Simons Observatory [56], will provide high fidelity maps of the CMB lensing convergence over a large fraction of the sky.…”

Section: Introductionmentioning

confidence: 99%

Looking through the same lens: Shear calibration for LSST, Euclid, and WFIRST with stage 4 CMB lensing

et al. 2017

Self Cite

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The next-generation weak lensing surveys (i.e., LSST, Euclid, and WFIRST) will require exquisite control over systematic effects. In this paper, we address shear calibration and present the most realistic forecast to date for LSST/Euclid/WFIRST and CMB lensing from a stage 4 CMB experiment ("CMB S4"). We use the COSMOLIKE code to simulate a joint analysis of all the two-point functions of galaxy density, galaxy shear, and CMB lensing convergence. We include the full Gaussian and non-Gaussian covariances and explore the resulting joint likelihood with Monte Carlo Markov chains. We constrain shear calibration biases while simultaneously varying cosmological parameters, galaxy biases, and photometric redshift uncertainties. We find that CMB lensing from CMB S4 enables the calibration of the shear biases down to 0.2%-3% in ten tomographic bins for LSST (below the ∼0.5% requirements in most tomographic bins), down to 0.4%-2.4% in ten bins for Euclid, and 0.6%-3.2% in ten bins for WFIRST. For a given lensing survey, the method works best at high redshift where shear calibration is otherwise most challenging. This self-calibration is robust to Gaussian photometric redshift uncertainties and to a reasonable level of intrinsic alignment. It is also robust to changes in the beam and the effectiveness of the component separation of the CMB experiment, and slowly dependent on its depth, making it possible with third-generation CMB experiments such as AdvACT and SPT-3G, as well as the Simons Observatory.

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The Atacama Cosmology Telescope: Lensing of CMB Temperature and Polarization Derived From Cosmic Infrared Background Cross-Correlation

Cited by 85 publications

References 95 publications

Planck2015 results

Planck2015 results

BICEP2, Planck, spinorial space-time, pre-Big Bang.

Looking through the same lens: Shear calibration for LSST, Euclid, and WFIRST with stage 4 CMB lensing

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