120 citations · 1.5k across the 48 of their papers we have counts for
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New constraints on light Axion-Like Particles using Chandra Transmission Grating Spectroscopy of the powerful cluster-hosted quasar H1821+643
Júlia Sisk Reynés, James H. Matthews, Christopher S. Reynolds +3
Axion-Like Particles (ALPs) are predicted by several Beyond the Standard Model theories, in particular, string theory. In the presence of an external magnetic field perpendicular t…
Echoes of the past: ultra-high energy cosmic rays accelerated by radio galaxies, scattered by starburst galaxies
Anthony Bell, James Matthews
We explore the possibility that the hotspot of ultrahigh energy cosmic rays (UHECR) detected by the Telescope Array (TA) from the approximate direction of M82 and the M81 group of…
The Fourier formalism for relativistic axion-photon conversion, with astrophysical applications
M. C. David Marsh, James H. Matthews, Christopher Reynolds +1
We study the weak mixing of photons and relativistic axion-like particles (axions) in plasmas with background magnetic fields, . We show that, to leading order in the axio…
Probing the Wind Component of Radio Emission in Luminous High-Redshift Quasars
Gordon T. Richards, Trevor V. McCaffrey, Amy Kimball +4
We discuss a probe of the contribution of wind-related shocks to the radio emission in otherwise radio-quiet quasars. Given 1) the non-linear correlation between UV and X-ray lumin…
Particle acceleration in radio galaxies with flickering jets: GeV electrons to ultrahigh energy cosmic rays
James H. Matthews, Andrew M. Taylor
Variability is a general property of accretion discs and their associated jets. We introduce a semi-analytic model for particle acceleration and radio jet/lobe evolution and explor…
Placing LOFAR-detected quasars in CIV emission space: implications for winds, jets and star formation
Amy L. Rankine, James H. Matthews, Paul C. Hewett +3
We present an investigation of the low-frequency radio and ultraviolet properties of a sample of 10,500 quasars from the Sloan Digital Sky Survey Data Release 14, observed…