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Joint Analysis of BICEP2/Keck Array and Planck Data

Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +277 more

We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg² patch of sky centered on RA 0 h, Dec. -57.5 ° . The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polariz…

Observing Inflationary Reheating

Ringeval, Christophe; Martin, Jérôme; Vennin, Vincent

Reheating is the epoch which connects inflation to the subsequent hot big-bang phase. Conceptually very important, this era is, however, observationally poorly known. We show that the current Planck satellite measurements of the cosmic microwave background (CMB) anisotropies constrain the kinematic properties of the reheating era for most of the i…

First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background

Follin, Brent; Knox, Lloyd; Millea, Marius +1 more

The unimpeded relativistic propagation of cosmological neutrinos prior to recombination of the baryon-photon plasma alters gravitational potentials and therefore the details of the time-dependent gravitational driving of acoustic oscillations. We report here a first detection of the resulting shifts in the temporal phase of the oscillations, which…

Neutral Hydrogen Structures Trace Dust Polarization Angle: Implications for Cosmic Microwave Background Foregrounds

Peek, J. E. G.; Hill, J. Colin; Clark, S. E. +2 more

Using high-resolution data from the Galactic Arecibo L-Band Feed Array HI (GALFA-Hi) survey, we show that linear structure in Galactic neutral hydrogen (Hi) correlates with the magnetic field orientation implied by Planck 353 GHz polarized dust emission. The structure of the neutral interstellar medium is more tightly coupled to the magnetic field…

Evidence of Lensing of the Cosmic Microwave Background by Dark Matter Halos

Hilton, Matt; Hasselfield, Matthew; Bond, J. Richard +41 more

We present evidence of the gravitational lensing of the cosmic microwave background by 10¹³ solar mass dark matter halos. Lensing convergence maps from the Atacama Cosmology Telescope Polarimeter (ACTPol) are stacked at the positions of around 12 000 optically selected CMASS galaxies from the SDSS-III/BOSS survey. The mean lensing signa…

Evidence of the Missing Baryons from the Kinematic Sunyaev-Zeldovich Effect in Planck Data

Wang, Wenting; Ma, Yin-Zhe; Herranz, Diego +4 more

We estimate the amount of the missing baryons detected by the Planck measurements of the cosmic microwave background in the direction of central galaxies (CGs) identified in the Sloan galaxy survey. The peculiar motion of the gas inside and around the CGs unveils values of the Thomson optical depth τ_T in the range 0.2 - 2 ×1 0^-4