Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Drury, Luke O'C."'
We report the results of an exploratory study that examines the judgments of climate scientists, climate policy experts, astrophysicists, and non-experts (N = 3,367) about the factors that contribute to the creation and persistence of disagreement wi
Externí odkaz:
http://arxiv.org/abs/1802.01889
Autor:
Drury, Luke O'C.
The arguments surrounding the Galactic component of the cosmic rays, the energy budget, questions of composition, spectral features, anisotropy, sources etc, will be critically examined. We are moving into a new phase in the study of the Galactic cos
Externí odkaz:
http://arxiv.org/abs/1708.08858
Autor:
Drury, Luke O'C., Strong, Andrew W.
Publikováno v:
A&A 597, A117 (2017)
We make quantitative estimates of the power supplied to the Galactic cosmic ray population by second-order Fermi acceleration in the interstellar medium, or as it is usually termed in cosmic ray propagation studies, diffusive reacceleration. Using re
Externí odkaz:
http://arxiv.org/abs/1608.04227
Autor:
Drury, Luke O'C., Strong, Andrew W.
Publikováno v:
PoS(ICRC2015)483
Cosmic-ray scattering on magnetic turbulence leads to spatial diffusive propagation; if the scattering medium is moving, this will inevitably also cause changes in the momentum of the particles, so-called diffusive reacceleration. This can be describ
Externí odkaz:
http://arxiv.org/abs/1508.02675
Autor:
Drury, Luke O'C.
The problem of the origin of Cosmic Rays is now over a century old and while there has been substantial progress, especially in the last decade, there are still open questions. The question of "origin" is open to at least three possible interpretatio
Externí odkaz:
http://arxiv.org/abs/1412.1376
Autor:
Thornbury, Andrew, Drury, Luke O'C.
We derive an analytic expression for the power transferred from interstellar turbulence to the Galactic cosmic rays in propagation models which include re-acceleration. This is used to estimate the power required in such models and the relative impor
Externí odkaz:
http://arxiv.org/abs/1404.2104
Autor:
Drury, Luke O'C.
Recent observations have revealed structure on small angular scales in the anisotropy data of cosmic rays at multi TeV energies. Even though the absolute amplitudes are very small, these effects are somewhat surprising and a wide range of possible ca
Externí odkaz:
http://arxiv.org/abs/1305.6752
Autor:
Drury, Luke O'C., Downes, Turlough P.
Observations of non-thermal emission from several supernova remnants suggest that magnetic fields close to the blastwave are much stronger than would be naively expected from simple shock compression of the field permeating the interstellar medium (I
Externí odkaz:
http://arxiv.org/abs/1205.6823
Autor:
Drury, Luke O'C.
It is argued that there are three `origins' of cosmic rays; the origin of the particles, the origin of the energy, and the site of the acceleration. The evidence for each origin is discussed and a plausible synthesis outlined for the particles of Gal
Externí odkaz:
http://arxiv.org/abs/1203.3681
Autor:
Drury, Luke O'C.
A box model is used to study first order Fermi acceleration driven by magnetic reconnection. It is shown, at least in this simple model, that the spectral index of the accelerated particles is related to the total compression in the same way as in di
Externí odkaz:
http://arxiv.org/abs/1201.6612