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The recent detection of the "cosmic dawn" redshifted 21 cm signal at 78 MHz by the EDGES experiment differs significantly from theoretical predictions. In particular, the absorption trough is roughly a factor of two stronger than the most…

Cosmology and Nongalactic Astrophysics · Physics 2018-05-16 Jayce Dowell , Greg B. Taylor

Our present knowledge of neutrinos can be summarized in terms of the "standard neutrino scenario". Phenomenology of this scenario as well as attempts to uncover physics behind neutrino mass and mixing are described. Goals of future studies…

High Energy Physics - Phenomenology · Physics 2008-12-18 Alexei Yu. Smirnov

Polarized Galactic synchrotron emission is an undesirable foreground for cosmic microwave background (CMB) experiments observing at frequencies $< 150$ GHz. We perform a combined analysis of observational data at 1.4, 2.3, 23, 30 and 33 GHz…

Cosmology and Nongalactic Astrophysics · Physics 2022-09-07 Janet L. Weiland , Graeme E. Addison , Charles L. Bennett , Mark Halpern , Gary Hinshaw

Synchrotron diffuse radiation (SDR) emission is one of the major Galactic components, in the 100 MHz up to 100 GHz frequency range. Its spectrum and sky map provide valuable measure of the galactic cosmic ray electrons (GCRE) in the…

High Energy Astrophysical Phenomena · Physics 2018-11-08 Giuseppe Di Bernardo , Dario Grasso , Carmelo Evoli , Daniele Gaggero

We follow up on the surprising recent announcement by Vernstrom et al. (2021) of the detection of the synchrotron cosmic web. We attempt to reproduce their detection with new observations with the Phase II, extended configuration of the…

Cosmology and Nongalactic Astrophysics · Physics 2022-05-11 Torrance Hodgson , Melanie Johnston-Hollitt , Benjamin McKinley , Natasha Hurley-Walker

We use absolutely calibrated data between 3 and 90 GHz from the 2006 balloon flight of the ARCADE 2 instrument, along with previous measurements at other frequencies, to constrain models of extragalactic emission. Such emission is a…

Cosmology and Nongalactic Astrophysics · Physics 2009-01-21 M. Seiffert , D. J. Fixsen , A. Kogut , S. M. Levin , M. Limon , P. M. Lubin , P. Mirel , J. Singal , T. Villela , E. Wollack , C. A. Wuensche

We present a study of the spectral, polarimetric, morphological and environmental properties of the diffuse radio source 0809+39 using observations taken with the Westerbork Synthesis Radio Telescope, the Very Large Array, and archival…

Astrophysics · Physics 2009-11-13 Shea Brown , Lawrence Rudnick

In recent years, the level of the extragalactic radio background has become a point of considerable interest, with some lines of argument pointing to an entirely new cosmological synchrotron background. The contribution of the known…

Cosmology and Nongalactic Astrophysics · Physics 2020-11-18 M. J. Hardcastle , T. W. Shimwell , C. Tasse , P. N. Best , A. Drabent , M. J. Jarvis , I. Prandoni , H. J. A. Rottgering , J. Sabater , D. J. Schwarz

We ask whether the recent OPERA results on neutrino superluminality could be an environmental effect characteristic of the local neighborhood of our planet, without the need of violation of the Poincar\'e-invariance at a fundamental level.…

High Energy Physics - Phenomenology · Physics 2012-03-05 Gia Dvali , Alexander Vikman

The cosmic background due to the Sunyaev-Zeldovich (SZ) effect is expected to be the largest signal at mm and cm wavelengths at a resolution of a few arcminutes. We investigate some simple statistics of SZ maps and their scaling with the…

Astrophysics · Physics 2009-11-13 Gilbert Holder , Ian G. McCarthy , Arif Babul

Understanding the role of magnetic fields in star-forming regions is of fundamental importance. In the near future, the exceptional sensitivity of SKA will offer a unique opportunity to evaluate the magnetic field strength in molecular…

High Energy Astrophysical Phenomena · Physics 2018-12-12 Marco Padovani , Daniele Galli

We present results of an imaging observation of the central region of a giant radio galaxy B1358+305. The classical, standard scenario of Fanaroff-Riley II radio galaxies suggests that shock produced hot electrons contained in a radio…

Astrophysics of Galaxies · Physics 2015-05-18 Masako YAMADA , Y. Fujita , H. Matsuo , N. Sugiyama

Our position inside the Galaxy requires all-sky surveys to reveal its large-scale properties. The zero-level calibration of all-sky surveys differs from standard 'relative' measurements, where a source is measured in respect to its…

Astrophysics · Physics 2009-11-13 Wolfgang Reich , Patricia Reich

The high Galactic latitude sky at millimeter and submm wavelengths contains significant cosmological information about the early Universe (in terms of the cosmic microwave background) but also the process of structure formation in the…

Cosmology and Nongalactic Astrophysics · Physics 2010-09-16 Luca Conversi , Paola Fiadino , Paolo de Bernardis , Silvia Masi

The complex processes of baryonic feedback associated with galaxy evolution are still poorly understood, and their impact on the clustering of matter on small scales remains difficult to quantify. While many fitting functions and emulators…

Cosmology and Nongalactic Astrophysics · Physics 2025-11-26 Alex Laguë , Mathew S. Madhavacheril , Josh Borrow , Kendrick M. Smith , Xinyi Chen , Matthieu Schaller , Joop Schaye

The synchrotron radio morphology of bilateral supernova remnants depends on the mechanisms of particle acceleration and on the viewing geometry. However, unlike X-ray and $\gamma$-ray morphologies, the radio emission does not depend on the…

High Energy Astrophysical Phenomena · Physics 2015-05-28 F. Bocchino , S. Orlando , M. Miceli , O. Petruk

This Report summarizes findings and recommendations from the Kavli-IAU workshop on "Probing the Universe from far-infrared to millimeter wavelengths: future facilities and their synergies" which took place from 26 to 28 March 2024 in…

Recently Vernstrom et al. (2021) claimed the first definitive detection of the synchrotron cosmic web, obtained by `stacking' hundreds of thousands of pairs of close-proximity clusters in low-frequency radio observations and looking for a…

Cosmology and Nongalactic Astrophysics · Physics 2022-08-08 Torrance Hodgson , Franco Vazza , Melanie Johnston-Hollitt , Benjamin McKinley