Results 81 to 90 of about 1,960 (179)

Perspectives for Cosmological Reionization From Future CMB and Radio Projects

Frontiers in Astronomy and Space Sciences, 2018
In spite of the great recent results from the Planck satellite supporting cosmological reionization scenarios almost compatible with astrophysical models for the evolution of structure, galaxy and star formation, the full understanding of the ...
Tiziana Trombetti, Tiziana Trombetti, Carlo Burigana, Carlo Burigana, Carlo Burigana   +4 more
doaj   +1 more source

Simons Observatory: Characterization of the Large Aperture Telescope Receiver

The Astrophysical Journal Supplement Series
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that currently consists of three 0.42 m small-aperture telescopes and one 6 m large-aperture telescope (LAT), located at an elevation of 5200 m in the ...
Tanay Bhandarkar, Saianeesh K. Haridas, Jeff Iuliano, Anna Kofman, Alex Manduca, Karen Perez Sarmiento, John Orlowski-Scherer, Thomas P. Satterthwaite, Yuhan Wang, Zeeshan Ahmed, Jason E. Austermann, Kyuyoung Bae, Gabriele Coppi, Mark J. Devlin, Simon R Dicker, Peter N. Dow, Shannon M. Duff, Daniel Dutcher, Nicholas Galitzki, Jon E. Gudmundsson, Shawn W. Henderson, Johannes Hubmayr, Bradley R. Johnson, Matthew A. Koc, Brian J. Koopman, Michele Limon, Michael J Link, Tammy J. Lucas, Jenna E. Moore, Federico Nati, Michael D. Niemack, Carlos E. Sierra, Max Silva-Feaver, Robinjeet Singh, Rita F. Sonka, Suzanne T. Staggs, Robert J. Thornton, Tran Tsan, Jeff L. Van Lanen, Eve M. Vavagiakis, Michael R Vissers, Liam Walters, Mario Zannoni, Kaiwen Zheng   +43 more
doaj   +1 more source

Imprints of quantum gravity in the cosmic microwave background

European Physical Journal C: Particles and Fields, 2019
It has been shown that the spectrum of quantum gravity contains at least two new modes in addition to the massless graviton: a massive spin-0 and a massive spin-2.
Xavier Calmet, James Edholm, Iberê Kuntz   +2 more
doaj   +1 more source

Separation of Correlated Astrophysical Sources Using Multiple-Lag Data Covariance Matrices

EURASIP Journal on Advances in Signal Processing, 2005
This paper proposes a new strategy to separate astrophysical sources that are mutually correlated. This strategy is based on second-order statistics and exploits prior information about the possible structure of the mixing matrix.
Baccigalupi C, Bedini L, Herranz D, Salerno E, Kuruoğlu EE, Tonazzini A   +5 more
doaj   +1 more source

On Observing the Cosmic Microwave Background

, 1997
30 pages with 12 figures included. Uses epsf. Proceedings from the 3rd Int. School of Particle Astrophysics: "Generation of Large Scale Cosmological Structures," Erice, Sicily, Nov 3-13 ...
openaire   +2 more sources

Forecast of Foreground Cleaning Strategies for AliCPT-1

The Astrophysical Journal Supplement Series
We report the test results of several independent foreground cleaning pipelines used in the Ali CMB Polarization Telescope experiment (AliCPT-1), a high-altitude cosmic microwave background (CMB) imager in the Northern Hemisphere with thousands of ...
Junzhou Zhang, Shamik Ghosh, Jiazheng Dou, Yang Liu, Siyu Li, Jiming Chen, Jiaxin Wang, Zhaoxuan Zhang, Jacques Delabrouille, Mathieu Remazeilles, Chang Feng, Bin Hu, Hao Liu, Larissa Santos, Pengjie Zhang, Wen Zhao, Le Zhang, Zhi-Qi Huang, Hong Li, Xinmin Zhang   +19 more
doaj   +1 more source

Betti Functionals as Probes for Cosmic Topology

Universe
The question of the global topology of the Universe (cosmic topology) is still open. In the ΛCDM concordance model, it is assumed that the space of the Universe possesses the trivial topology of R3, and thus that the Universe has an infinite volume.
Ralf Aurich, Frank Steiner
doaj   +1 more source

Planck Dust Polarization Power Spectra Are Consistent with Strongly Supersonic Turbulence

The Astrophysical Journal
The polarization of the cosmic microwave background is rich in information but obscured by foreground emission from the Milky Way’s interstellar medium (ISM). To uncover relationships between the underlying turbulent ISM and the foreground power spectra,
Kye A. Stalpes, David C. Collins, Kevin M. Huffenberger   +2 more
doaj   +1 more source

Does the Correlation between 2MRS Galaxies and the CMB Indicate an Unmodeled CMB Foreground?

The Astrophysical Journal
We revisit the claimed detection of a new cosmic microwave background (CMB) foreground based on the correlation between low-redshift Two Micron All Sky Survey Redshift Survey (2MRS) galaxies and CMB temperature maps from the Planck and Wilkinson ...
Graeme E. Addison
doaj   +1 more source

Does standard cosmology really predict the cosmic microwave background? [PDF]

F1000Res, 2020
Traunmüller H.
europepmc   +1 more source