Results 111 to 120 of about 2,720 (178)

Two 100 TeV Neutrinos Coincident with the Seyfert Galaxy NGC 7469

The Astrophysical Journal
In 2013, the IceCube collaboration announced the detection of a diffuse high-energy astrophysical neutrino flux. The origin of this flux is still largely unknown. The most significant individual source is the close-by Seyfert galaxy NGC 1068 at the 4.2 σ
Giacomo Sommani, Anna Franckowiak, Massimiliano Lincetto, Ralf-Jürgen Dettmar   +3 more
doaj   +1 more source

Energy Cascade and Damping in Fast-mode Compressible Turbulence

The Astrophysical Journal Letters
Compressible turbulence governs energy transfer across scales in space and astrophysical systems. Capturing both the turbulence cascade and damping is therefore crucial for models of energy conversion, plasma heating, and particle transport in diverse ...
Chuanpeng Hou, Huirong Yan, Siqi Zhao, Parth Pavaskar   +3 more
doaj   +1 more source

Possible extragalactic positron annihilation signal

Astronomy & Astrophysics
Context. With 20 years of INTEGRAL/SPI observations, the most detailed map of the positron annihilation line at 511 keV was created. While the central bulge and extended disk are readily recognised in this map, several hotspots at high latitude regions ...
Siegert Thomas, Yoneda Hiroki
doaj   +1 more source

Sub-GeV dark matter and MeV gamma-ray detection with COSI

Journal of High Energy Physics
Sub-GeV dark matter (DM) has been attracting more attention due to the negative results searching for traditional weakly interacting massive particles (WIMPs).
Yu Watanabe, Shigeki Matsumoto, Christopher M Karwin, Tom Melia, Michela Negro, Thomas Siegert, Yuki Watanabe, Hiroki Yoneda, Tadayuki Takahashi   +8 more
doaj   +1 more source

Speed limits of the laser-induced phase transition in FeRh

APL Materials
We use ultrafast x-ray diffraction and the polar time-resolved magneto-optical Kerr effect to study the laser-induced metamagnetic phase transition in two FeRh films with thicknesses below and above the optical penetration depth.
M. Mattern, J. Jarecki, J. A. Arregi, V. Uhlíř, M. Rössle, M. Bargheer   +5 more
doaj   +1 more source

Two hot pre-white dwarfs inside the red giant branch planetary nebula Pa 13

Astronomy & Astrophysics
The close binary central stars of planetary nebulae (PNe) offer a unique window for investigating the conditions that immediately follow the ejection of a common envelope (CE). Double-eclipsing and double-lined double systems are particularly valuable as
Reindl Nicole, Jones David, Hillwig Todd, Miller Bertolami Marcelo M., Dorsch Matti, Chornay Nicholas, Pritzkuleit Max   +6 more
doaj   +1 more source

Buried-stressor technology for the epitaxial growth and device integration of site-controlled quantum dots

Materials for Quantum Technology
Semiconductor quantum dots (QDs) are high-quality nanocrystals that provide three-dimensional carrier confinement on the scale of the de Broglie wavelength.
Kartik Gaur, Priyabrata Mudi, Petr Klenovsky, Stephan Reitzenstein   +3 more
doaj   +1 more source

Electron pressure drives THz phonons in metal-metal superlattices. [PDF]

Nat Commun
Pudell JE, Mattern M, Herzog M, von Reppert A, Singh CK, Schick D, Hehn M, Boesenberg U, Rodriguez-Fernandez A, Shayduk R, Jo W, Möller J, Hallmann J, Wrigley J, Oppeneer PM, Madsen A, Bargheer M.   +16 more
europepmc   +1 more source

Photothermal Polarimetric Nanoscopy: An Emerging Technique for Fingerprinting Minerals of Extraterrestrial Origin. [PDF]

ACS Earth Space Chem
Shay T, Hinrichs K, Pavlov SG, Stojanovic N, Weber I, Morlok A, Gensch M.   +6 more
europepmc   +1 more source

Mechanisms of Hydroxyl Radical Chemistry in Aqueous Solution Triggered by Photoexcitation and Probed by Soft X-rays. [PDF]

J Am Chem Soc
Cordsmeier L, Ribeiro da Silva Neto W, Fondell M, Mitzner R, Vaz da Cruz V, Eckert S, Föhlisch A.   +6 more
europepmc   +1 more source