Results 131 to 140 of about 257,498 (300)
Correlations between 21 cm Radiation and the CMB from Active Sources
, 2010 Neutral hydrogen is ubiquitous, absorbing and emitting 21 cm radiation throughout much of the Universe's history. Active sources of perturbations, such as cosmic strings, would generate simultaneous perturbations in the distribution of neutral hydrogen ...
Aaron Berndsen +39 more
core +1 more source
The temperature of the cosmic microwave background radiation at a frequency of 10 GHz [PDF]
, 1988 A. Kogut +8 more
openalex +1 more source
The Cosmic Microwave Background: a strange characteristic [PDF]
arXiv, 2009 The ratio of the self-gravitational energy density of the scattering particles in the universe to the energy density of the scattered photons in the cosmic microwave background (CMB) is the same in any volume of space. These two energy densities are equal at a radiation temperature on the order of the present CMB temperature.
arxiv
Isotropic blackbody cosmic microwave background radiation as evidence for a homogeneous universe.
Physical Review Letters, 2012 The question of whether the Universe is spatially homogeneous and isotropic on the largest scales is of fundamental importance to cosmology but has not yet been answered decisively.
T. Clifton, C. Clarkson, P. Bull
semanticscholar +1 more source
Ultraviolet modified photons and anisotropies in the cosmic microwave background radiation
Physics Letters B, 2006 RevTeX ...
Gamboa, J +2 more
openaire +6 more sources
Imprints of microcausality violation on the cosmic microwave background [PDF]
arXiv, 2008 We consider a modification of the Heisenberg algebra with the non-vanishing commutator of scalar field operators. We then identify the scalar field with the second quantized inflaton fluctuation and calculate effects of microcausality violation on the temperature anisotropy of cosmic microwave background radiation.
arxiv
Sensitivity-improved Polarization Maps at 40 GHz with CLASS and WMAP Data
The Astrophysical JournalImproved polarization measurements at frequencies below 70 GHz with degree-level angular resolution are crucial for advancing our understanding of the Galactic synchrotron radiation and the potential polarized anomalous microwave emission and ultimately ...
Rui Shi +20 more
doaj +1 more source
Cosmological signatures of a mirror twin Higgs
Journal of High Energy Physics, 2018 We explore the cosmological signatures associated with the twin baryons, electrons, photons and neutrinos in the Mirror Twin Higgs framework. We consider a scenario in which the twin baryons constitute a subcomponent of dark matter, and the contribution ...
Zackaria Chacko +3 more
doaj +1 more source
The Cosmic Microwave Background Radiation (CMBR) Anisotropy
, 2019 In this chapter we will describe the Cosmic Microwave Background Radiation and its anisotropy. After describing the CMBR kinematics, we will see how primordial perturbations, in particular curvature perturbations, that were already observed, are described and propagate, and how they influence the CMBR.
openaire +3 more sources
To the problem of the secondary CMB anisotropy separation
EPJ Web of Conferences, 2016 We study contribution to the secondary anisotropy maps of cosmic microwave background (CMB) radiation which difficult to account for faint sources. Two effects are investigated.
Verkhodanov Oleg +3 more
doaj +1 more source