Results 21 to 30 of about 54,682 (254)
The Astrophysical Journal, 2023 The exquisitely measured maps of fluctuations in the cosmic microwave background (CMB) present the possibility of systematically testing the principle of statistical isotropy of the Universe. A systematic approach based on strong mathematical formulation
Dipanshu, Tarun Souradeep, Shriya Hirve
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The Astrophysical Journal Letters, 2023 It has been pointed out that the spurious cosmic microwave background (CMB) B -mode polarization signals caused by the absorption of the CMB monopole component due to the Galactic interstellar matter, called the CMB shadow, degrade the accuracy of ...
Tamaki Murokoshi +4 more
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Comment on "On the Origin of the Highest Energy Cosmic Rays" [PDF]
, 1998 We show that the photodisintegration of heavy cosmic ray nuclei with energies above 10^20 eV is dominated by interactions with photons from the cosmic microwave background radiation, rather than from infrared ones.
E. Roulet +4 more
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Lensing Reconstruction from the Cosmic Microwave Background Polarization with Machine Learning
The Astrophysical Journal, 2023 The lensing effect of the cosmic microwave background (CMB) is a powerful tool for our study of the distribution of matter in the universe. The quadratic estimator (QE) method, which is widely used to reconstruct lensing potential, has been known to be ...
Ye-Peng Yan +4 more
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POLAR: Instrument and Results [PDF]
, 2002 We describe the design, performance, and results of a polarimeter used to make precision measurements of the 2.7 K cosmic microwave background. In the Spring of 2000 the instrument searched for polarized emission in three microwave frequency bands ...
de Oliveira-Costa, Angelica +6 more
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Photon-graviton conversion in a primordial magnetic field and the cosmic microwave background [PDF]
, 1996 We reconsider the effects of photon-graviton conversion in a primordial magnetic field upon the cosmic microwave background radiation. We argue that plasma effects make the photon-graviton conversion process negligible.Comment: Revtex, 3 pages. To appear
Cillis, Analia N., Harari, Diego D.
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Neutrinos and Cosmology: an update [PDF]
, 2005 We review the current cosmological status of neutrinos, with particular emphasis on their effects on Big Bang Nucleosynthesis, Large Scale Structure of the universe and Cosmic Microwave Background Radiation measurements.Comment: 4 pages, 1 figure, to ...
Pisanti, Ofelia, Serpico, P. D.
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The Astrophysical Journal, 2023 Reliable extraction of cosmological information from observed cosmic microwave background (CMB) maps may require removal of strongly foreground-contaminated regions from the analysis. In this paper, we employ an artificial neural network (ANN) to predict
Srikanta Pal, Pallav Chanda, Rajib Saha
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On parton distributions in a photon gas
, 2009 In some cases it may be useful to know parton distributions in a photon gas. This may be relevant, e.g., for the analysis of interactions of high energy cosmic ray particles with the cosmic microwave background radiation.
A. Ringwald +27 more
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The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps
The Astrophysical Journal, 2023 We conduct a systematic search for transients in 3 yr of data (2017–2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77–277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered
Yaqiong Li +36 more
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