Results 21 to 30 of about 4,214,854 (199)

Probing the origin of extragalactic magnetic fields with Fast Radio Bursts [PDF]

Monthly notices of the Royal Astronomical Society, 2018
The joint analysis of the Dispersion and Faraday Rotation Measure from distant, polarised Fast Radio Bursts may be used to put constraints on the origin and distribution of extragalactic magnetic fields on cosmological scales.
F. Vazza, M. Brüggen, P. Hinz, D. Wittor, N. Locatelli, C. Gheller   +5 more
semanticscholar   +1 more source

Constraining primordial magnetic fields with line-intensity mapping [PDF]

Journal of Cosmology and Astroparticle Physics, 2023
Primordial magnetic fields (PMFs) offer a compelling explanation for the origin of observed magnetic fields, especially on extragalactic scales. Such PMFs give rise to excess of power in small scale matter perturbations that could strongly influence ...
Tal Adi, S. Libanore, H. A. Cruz, E. Kovetz   +3 more
semanticscholar   +1 more source

Cosmic recombination in the presence of primordial magnetic fields [PDF]

Journal of Cosmology and Astroparticle Physics, 2023
Primordial magnetic fields (PMFs) may explain observations of magnetic fields on extragalactic scales. They are most cleanly constrained by measurements of cosmic microwave background radiation (CMB) anisotropies.
K. Jedamzik, Tom Abel, Yacine Ali-Haïmoud   +2 more
semanticscholar   +1 more source

Deep Synoptic Array Science: Implications of Faraday Rotation Measures of Fast Radio Bursts Localized to Host Galaxies

The Astrophysical Journal Letters, 2023
Faraday rotation measures (RMs) of fast radio bursts (FRBs) offer the prospect of directly measuring extragalactic magnetic fields. We present an analysis of the RMs of 10 as yet nonrepeating FRBs detected and localized to host galaxies with robust ...
Myles B. Sherman, Liam Connor, Vikram Ravi, Casey Law, Ge Chen, Kritti Sharma, Morgan Catha, Jakob T. Faber, Gregg Hallinan, Charlie Harnach, Greg Hellbourg, Rick Hobbs, David Hodge, Mark Hodges, James W. Lamb, Paul Rasmussen, Jun Shi, Dana Simard, Jean Somalwar, Reynier Squillace, Sander Weinreb, David P. Woody, Nitika Yadlapalli, The Deep Synoptic Array Team   +23 more
doaj   +1 more source

New Limits on Extragalactic Magnetic Fields from Rotation Measures. [PDF]

Physical Review Letters, 2015
We take advantage of the wealth of rotation measures data contained in the NRAO VLA Sky Survey catalog to derive new, statistically robust, upper limits on the strength of extragalactic magnetic fields.
M. Pshirkov, P. Tinyakov, F. Urban
semanticscholar   +1 more source

Evidence for Strong Extragalactic Magnetic Fields from Fermi Observations of TeV Blazars [PDF]

Science, 2010
On the Origins of Magnetism The magnetic fields in galaxies and galaxy clusters are thought to result from the amplification of weak primordial magnetic fields, which, according to one class of theories, should exist in the voids between galaxies and ...
A. Neronov, I. Vovk
semanticscholar   +1 more source

New Method for Investigating the Presence of Extragalactic Magnetic Fields [PDF]

JETP Letters : Journal of Experimental And Theoretical Physics Letters
The extragalactic magnetic field could be detected by searching for signatures of the electromagnetic cascade initiated by high-energy photons on the intergalactic radiation and deflected by the field. This process produces a time delay and an extended
Boris E. Stern, I. Tkachev
semanticscholar   +1 more source

A tool to understand emission mechanisms of blazars through their high‐energy gamma‐ray emission

Astronomische Nachrichten, Volume 344, Issue 6, August 2023., 2023
The blazar SED is characterized by two energy components. Evidence suggests that the low‐energy component is generated by the synchrotron mechanism, but for the high‐energy component, the mechanism is still uncertain. Two main models have been proposed to explain this emission. According to the leptonic model, a correlation between the emission of both
Mabel Osorio, Erick Rangel, José Rodrigo Sacahui, María Magdalena González   +3 more
wiley   +1 more source

Multiwavelength astrophysics of the blazar OJ 287 and the project MOMO

Astronomische Nachrichten, Volume 344, Issue 4, May 2023., 2023
Abstract We are carrying out the densest and longest multiyear, multiwavelength monitoring project of OJ 287 ever done. The project MOMO (Multiwavelength Observations and Modeling of OJ 287) covers wavelengths from the radio to the high‐energy regime. A few selected observations are simultaneous with those of the Event Horizon Telescope (EHT).
S. Komossa, A. Kraus, D. Grupe, M.L. Parker, A. Gonzalez, L.C. Gallo, M.A. Gurwell, S. Laine, S. Yao, S. Chandra, L. Dey, J.L. Gómez, K. Hada, D. Haggard, A.R. Hollett, H. Jermak, S. Jorstad, T.P. Krichbaum, S. Markoff, C. McCall, J. Neilsen, M. Nowak   +21 more
wiley   +1 more source

On the topology of global coronal magnetic fields [PDF]

, 2014
This thesis considers the magnetic topology of the global solar corona. To understand the magnetic topology we use the magnetic skeleton which provides us with a robust description of the magnetic field.
Edwards, Sarah J.
core   +2 more sources