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85 papers · 1 filter
Planck intermediate results. LII. Planet flux densities
Planck Collaboration, Y. Akrami, M. Ashdown +147
Measurements of flux density are described for five planets, Mars, Jupiter, Saturn, Uranus, and Neptune, across the six Planck High Frequency Instrument frequency bands (100-857 GH…
NuSTAR and XMM-Newton observations of the Arches cluster in 2015: fading hard X-ray emission from the molecular cloud
Roman Krivonos, Maica Clavel, JaeSub Hong +6
We present results of long NuSTAR (200 ks) and XMM-Newton (100 ks) observations of the Arches stellar cluster, a source of bright thermal (kT~2 keV) X-rays with prominent Fe XXV K_…
Instanton Tunneling for De Sitter Space with Real Projective Spatial Sections
Yen Chin Ong, Dong-han Yeom
The physics of tunneling from one spacetime into another is often understood in terms of instantons. For some instantons, it was recently shown in the literature that there are two…
Dynamical Multiferroicity
Dominik Maximilian Juraschek, Michael Fechner, Alexander V. Balatsky +1
An appealing mechanism for inducing multiferroicity in materials is the generation of electric polarization by a spatially varying magnetization that is coupled to the lattice thro…
Higher derivative corrections to incoherent metallic transport in holography
Matteo Baggioli, Blaise Goutéraux, Elias Kiritsis +1
Transport in strongly-disordered, metallic systems is governed by diffusive processes. Based on quantum mechanics, it has been conjectured that these diffusivities obey a lower bou…
A new constraint on mean-field galactic dynamo theory
Luke Chamandy, Nishant K. Singh
Appealing to an analytical result from mean-field theory, we show, using a generic galaxy model, that galactic dynamo action can be suppressed by small-scale magnetic fluctuations.…