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pro vyhledávání: '"Crocker, Roland"'
Cosmic rays travelling through interstellar space have their propagation directions repeatedly scattered by fluctuating interstellar magnetic fields. The nature of this scattering is a major unsolved problem in astrophysics, one that has resisted sol
Externí odkaz:
http://arxiv.org/abs/2406.18160
Autor:
Shabala, Stanislav, Yates-Jones, Patrick, Jerrim, Larissa, Turner, Ross, Krause, Martin, Norris, Ray, Koribalski, Baerbel, Filipovic, Miroslav, Rudnick, Larry, Power, Chris, Crocker, Roland
Odd Radio Circles (ORCs) are a class of low surface brightness, circular objects approximately one arcminute in diameter. ORCs were recently discovered in the Australian Square Kilometre Array Pathfinder (ASKAP) data, and subsequently confirmed with
Externí odkaz:
http://arxiv.org/abs/2402.09708
Publikováno v:
MNRAS, Volume 530, Issue 2, May 2024, Pages 1849-1865
Galaxies obey a number of empirical correlations between their radio, {\gamma}-ray, and infrared emission, but the physical origins of these correlations remain uncertain. Here we use the CONGRuENTS model for broadband non-thermal emission from star-
Externí odkaz:
http://arxiv.org/abs/2310.05693
Publikováno v:
Physical Review D (Letter) 108, L061304 (2023)
TeV-range cosmic ray electrons and positrons (CREs) have been directly measured in the search for new physics or unknown astrophysical sources. CREs can inverse-Compton scatter solar photons and boost their energies into gamma ray bands. Any potentia
Externí odkaz:
http://arxiv.org/abs/2309.04784
A growing number of Milky Way globular clusters have been identified to possess a noticeable degree of solid-body rotation. For several clusters, the combination of stellar proper motions and radial velocities allows for 3-dimensional spin axes to be
Externí odkaz:
http://arxiv.org/abs/2306.11276
Autor:
Venville, Thomas A. A., Duffy, Alan R., Crocker, Roland M., Macias, Oscar, Tepper-García, Thor
The Sagittarius Dwarf Spheroidal galaxy (Sgr) is investigated as a target for DM annihilation searches utilising J-factor distributions calculated directly from a high-resolution hydrodynamic simulation of the infall and tidal disruption of Sgr aroun
Externí odkaz:
http://arxiv.org/abs/2303.13180
The total luminosity and spectral shape of the non-thermal emission produced by cosmic rays depends on their interstellar environment, a dependence that gives rise to correlations between galaxies' bulk properties -- star formation rate, stellar mass
Externí odkaz:
http://arxiv.org/abs/2212.09428
Cosmic rays in star-forming galaxies are a dominant source of both diffuse $\gamma$-ray emission and ionisation in gas too deeply shielded for photons to penetrate. Though the cosmic rays responsible for $\gamma$-rays and ionisation are of different
Externí odkaz:
http://arxiv.org/abs/2211.03488
We present criptic, the Cosmic Ray Interstellar Propagation Tool using It\^o Calculus, a new open-source software package to simulate the propagation of cosmic rays through the interstellar medium and to calculate the resulting observable non-thermal
Externí odkaz:
http://arxiv.org/abs/2207.13838
Autor:
Sampson, Matt L., Beattie, James R., Krumholz, Mark R., Crocker, Roland M., Federrath, Christoph, Seta, Amit
Cosmic rays (CRs) are a dynamically important component of the interstellar medium (ISM) of galaxies. The $\sim$GeV CRs that carry most CR energy and pressure are likely confined by self-generated turbulence, leading them to stream along magnetic fie
Externí odkaz:
http://arxiv.org/abs/2205.08174