Results 141 to 150 of about 256,877 (297)

Taking the Universe's Temperature with Spectral Distortions of the Cosmic Microwave Background. [PDF]

Physical Review Letters, 2015
The cosmic microwave background (CMB) energy spectrum is a near-perfect blackbody. The standard model of cosmology predicts small spectral distortions to this form, but no such distortion of the sky-averaged CMB spectrum has yet been measured.
J. Hill, N. Battaglia, J. Chluba, S. Ferraro, E. Schaan, D. Spergel   +5 more
semanticscholar   +1 more source

Exploring cosmic origins with CORE: Extragalactic sources in cosmic microwave background maps [PDF]

, 2016
We discuss the potential of a next generation space-borne Cosmic Microwave Background (CMB) experiment for studies of extragalactic sources. Our analysis has particular bearing on the definition of the future space project, CORE, that has been submitted ...
G. Zotti, J. González-Nuevo, M. López-Caniego, M. Negrello, J. Greenslade, C. Hernandez-Monteagudo, J. Delabrouille, Z. Cai, M. Bonato, A. Achúcarro, P. Ade, R. Allison, M. Ashdown, M. Ballardini, A. Banday, R. Banerji, J. Bartlett, N. Bartolo, S. Basak, M. Bersanelli, M. Biesiada, Maciej Bilicki, A. Bonaldi, J. Borrill, F. Bouchet, F. Boulanger, T. Brinckmann, M. Bucher, C. Burigana, A. Buzzelli, M. Calvo, C. Carvalho, M. Castellano, A. Challinor, J. Chluba, D. Clements, S. Clesse, S. Colafrancesco, I. Colantoni, A. Coppolecchia, M. Crook, G. D’Alessandro, P. Bernardis, G. Gasperis, J. Diego, E. D. Valentino, J. Errard, S. Feeney, R. Fernández-Cobos, S. Ferraro, F. Finelli, F. Forastieri, S. Galli, R. Génova-Santos, M. Gerbino, S. Grandis, S. Hagstotz, S. Hanany, Will Handley, C. Hervías-Caimapo, M. Hills, E. Hivon, K. Kiiveri, T. Kisner, T. Kitching, M. Kunz, H.Kurki-Suonio, G. Lagache, L. Lamagna, A. Lasenby, M. Lattanzi, A. Brun, J. Lesgourgues, A. Lewis, M. Liguori, V. Lindholm, G. Luzzi, B. Maffei, N. Mandolesi, E. Martínez-González, C. Martins, S. Masi, M. Massardi, D. McCarthy, A. Melchiorri, J. Melin, D. Molinari, A. Monfardini, P. Natoli, A. Notari, A. Paiella, D. Paoletti, R. B. Partridge, G. Patanchon, M. Piat, G. Pisano, L. Polastri, G. Polenta, A. Pollo, V. Poulin, M. Quartin, M. Remazeilles, M. Roman, G. Rossi, B. Roukema, J. Rubiño-Martín, L. Salvati, D. Scott, S. Serjeant, A. Tartari, L. Toffolatti, M. Tomasi, N. Trappe, S. Triqueneaux, T. Trombetti, M. Tucci, C. Tucker, J. Valiviita, R. Weygaert, B. Tent, V. Vennin, P. Vielva, N. Vittorio, K. Young, F. T. B. collaboration   +124 more
semanticscholar   +1 more source

The Thermal Structure and Composition of Jupiter's Great Red Spot From JWST/MIRI

Journal of Geophysical Research: Planets, Volume 129, Issue 10, October 2024.
Abstract Jupiter's Great Red Spot (GRS) was mapped by the James Webb Space Telescope (JWST)/Mid‐Infrared Instrument (4.9–27.9 μ ${\upmu }$m) in July and August 2022. These observations took place alongside a suite of visual and infrared observations from; Hubble, JWST/NIRCam, Very Large Telescope/VISIR and amateur observers which provided both spatial ...
Jake Harkett, Leigh N. Fletcher, Oliver R. T. King, Michael T. Roman, Henrik Melin, Heidi B. Hammel, Ricardo Hueso, Agustín Sánchez‐Lavega, Michael H. Wong, Stefanie N. Milam, Glenn S. Orton, Katherine de Kleer, Patrick G. J. Irwin, Imke de Pater, Thierry Fouchet, Pablo Rodríguez‐Ovalle, Patrick M. Fry, Mark R. Showalter   +17 more
wiley   +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

A Cosmic Microwave Background feature consistent with a cosmic texture

, 2007
The Cosmic Microwave Background provides our most ancient image of the Universe and our best tool for studying its early evolution. Theories of high energy physics predict the formation of various types of topological defects in the very early universe ...
E. Martinez-Gonzalez, M. Cruz, M. Hobson, N. Turok, P. Vielva, Turok, Turok   +6 more
core   +1 more source

Cosmic Microwave Background Acoustic Peak Locations [PDF]

, 2016
The Planck collaboration has measured the temperature and polarization of the cosmic microwave background well enough to determine the locations of eight peaks in the temperature (TT) power spectrum, five peaks in the polarization (EE) power spectrum and
Z. Pan, L. Knox, Brigid Mulroe, A. Narimani   +3 more
semanticscholar   +1 more source

Evidence of a New Population of Weak Terrestrial Gamma‐Ray Flashes Observed From Aircraft Altitude

Geophysical Research Letters, Volume 51, Issue 17, 16 September 2024.
Abstract Terrestrial Gamma‐ray Flashes (TGFs) are ten‐to‐hundreds of microsecond bursts of gamma‐rays produced when electrons in strong electric fields in thunderclouds are accelerated to relativistic energies. Space instruments have observed TGFs with source photon brightness down to ∼1017–1016. Based on space and aircraft observations, TGFs have been
I. Bjørge‐Engeland, N. Østgaard, D. Sarria, M. Marisaldi, A. Mezentsev, A. Fuglestad, N. Lehtinen, J. E. Grove, D. Shy, T. Lang, M. Quick, H. Christian, C. Schultz, R. Blakeslee, I. Adams, R. Kroodsma, G. Heymsfield, K. Ullaland, S. Yang, B. Hasan Qureshi, J. Søndergaard, B. Husa, D. Walker, M. Bateman, D. Mach, P. Bitzer, M. Fullekrug, M. Cohen, M. Stanley, S. Cummer, J. Montanya, M. Pazos, C. Velosa, O. van der Velde, Y. Pu, P. Krehbiel, J. A. Roncancio, J. A. Lopez, M. Urbani, A. Santos, T. Neubert, F. Gordillo‐Vazquez   +41 more
wiley   +1 more source

Magneto-optic effects of the cosmic microwave background

Nuclear Physics B, 2018
Generation of magneto-optic effects by the interaction of the CMB with cosmic magnetic fields is studied. Effects which generate polarization such as the Cotton–Mouton effect, vacuum polarization and photon–pseudoscalar mixing in external magnetic field ...
Damian Ejlli
doaj  

Multifunctional diamond‐based catalysts: Promising candidates for energy conversions in extreme environments—A mini‐review

Electron, Volume 2, Issue 3, August 2024.
The review systematically discusses the characteristics of extreme environments and exceptional properties diamond owns. Current research progress on diamond‐based catalysts in the fields of electrocatalysis and photocatalysis of CO2 is reviewed, as well as the challenges and prospects for the application of diamond‐based catalytic materials in extreme
Ziwei Zhao, Xiaowu Gao, Hansong Zhang, Keran Jiao, Pengfei Song, Yumin Zhang, Yongjie Wang, Jiaqi Zhu   +7 more
wiley   +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