Results 111 to 120 of about 256,877 (297)

Cosmic microwave background constraints for global strings and global monopoles [PDF]

, 2017
We present the first cosmic microwave background (CMB) power spectra from numerical simulations of the global O(N) linear σ-model, with N=2,3, which have global strings and monopoles as topological defects.
A. Lopez-Eiguren, J. Lizarraga, M. Hindmarsh, J. Urrestilla   +3 more
semanticscholar   +1 more source

Making Use of Low‐Cost High‐Pressure–High‐Temperature‐Diamond Materials for Industry‐Type Quantum Sensor Device Applications

physica status solidi (a), Volume 222, Issue 5, March 2025.
A cost‐effective approach to produce diamond platelets with nitrogen vacancy center (NV) ensemble range is investigated. NVs are generated in industrially produced high‐pressure–high‐temperature type 1b diamonds by high‐energy electron irradiation of 10 MeV and annealing.
Mario Bähr, Christoph Wild, Wolfgang Knolle, Muhammad B. Javed, Jens Fuhrmann, Tobias Lühmann, Steffanie Reiss, Jan B. Meijer, Thomas Ortlepp   +8 more
wiley   +1 more source

CLASS Observations of Atmospheric Cloud Polarization at millimeter Wavelengths

The Astrophysical Journal, 2023
The dynamic atmosphere imposes challenges to ground-based cosmic microwave background observation, especially for measurements on large angular scales.
Yunyang Li, John W. Appel, Charles L. Bennett, Ricardo Bustos, David T. Chuss, Joseph Cleary, Jullianna Denes Couto, Sumit Dahal, Rahul Datta, Rolando Dünner, Joseph R. Eimer, Thomas Essinger-Hileman, Kathleen Harrington, Jeffrey Iuliano, Tobias A. Marriage, Matthew A. Petroff, Rodrigo A. Reeves, Karwan Rostem, Rui Shi, Deniz A. N. Valle, Duncan J. Watts, Oliver F. Wolff, Edward J. Wollack, Zhilei Xu, CLASS Collaboration   +24 more
doaj   +1 more source

Stringy Signals from Large-Angle Correlations in the Cosmic Microwave Background?

Universe, 2022
We interpret the lack of large-angle temperature correlations and the even-odd parity imbalance observed in the cosmic microwave background (CMB) by COBE, WMAP and Planck satellite missions as a possible stringy signal ultimately stemming from a ...
Miguel-Angel Sanchis-Lozano
doaj   +1 more source

The Cosmic Microwave Background & Inflation, Then & Now [PDF]

, 2002
Boomerang, Maxima, DASI, CBI and VSA significantly increase the case for accelerated expansion in the early universe (the inflationary paradigm) and at the current epoch (dark energy dominance), especially when combined with data on high redshift ...
Bond, J. R., Contaldi, C. R., Mason, B. S., Myers, S. T., Pearson, T. J., Pen, U. -L., Pogosyan, D., Prunet, S., Readhead, A. C. S., Sievers, J. L.   +9 more
core   +2 more sources

The cosmic microwave background

, 2001
52 pages.
openaire   +3 more sources

Photon-graviton conversion in a primordial magnetic field and the cosmic microwave background [PDF]

Phys.Rev. D54 (1996) 4757-4759, 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.
arxiv   +1 more source

Detecting Patchy Reionization in the Cosmic Microwave Background. [PDF]

Physical Review Letters, 2016
Upcoming cosmic microwave background (CMB) experiments will measure temperature fluctuations on small angular scales with unprecedented precision. Small-scale CMB fluctuations are a mixture of late-time effects: gravitational lensing, Doppler shifting of
Kendrick M. Smith, S. Ferraro
semanticscholar   +1 more source

Impact of Sudden Stratospheric Warming and Elevated Stratopause Events on the Very Low Frequency Radio Signal

Journal of Geophysical Research: Space Physics, Volume 130, Issue 3, March 2025.
Abstract Sudden Stratospheric Warmings (SSW) and Elevated Stratopause (ES) events are mid‐to‐high latitudinal, atmospheric wave‐driven phenomena leading to significant changes in wind, temperatures, and vertical mass transport, especially at stratospheric and mesospheric altitudes.
H. Schneider, V. Wendt, D. Banyś, M. Hansen, M. Clilverd, P. T. Verronen   +5 more
wiley   +1 more source

Generative Models of Multichannel Data from a Single Example—Application to Dust Emission

The Astrophysical Journal, 2023
The quest for primordial B -modes in the cosmic microwave background has emphasized the need for refined models of the Galactic dust foreground. Here we aim at building a realistic statistical model of the multifrequency dust emission from a single ...
Bruno Régaldo-Saint Blancard, Erwan Allys, Constant Auclair, François Boulanger, Michael Eickenberg, François Levrier, Léo Vacher, Sixin Zhang   +7 more
doaj   +1 more source