Results 81 to 90 of about 17,365 (298)

Optical Skyrmions with Tunable or Reconfigurable Topology Using Spin‐Decoupled Metaoptics

Laser &Photonics Reviews, EarlyView.
The work introduces advanced optical elements capable of generating and dynamically reconfiguring complex light patterns known as optical skyrmions. By precisely shaping light polarization at the nanoscale, a single engineered metasurface can generate and manipulate robust and tunable polarization textures in an efficient and scalable way.
Andrea Vogliardi, Daniele Bonaldo, Simone Dal Zilio, Vittorio Apolloni, Filippo Romanato, Gianluca Ruffato   +5 more
wiley   +1 more source

Investigating the role of mutual information in the Page curve for a functional renormalization group improved Schwarzschild black hole

European Physical Journal C: Particles and Fields
The present work delves into probing the importance of mutual information of relevant subsystems in obtaining the correct time-evolution of fine-grained entropy of Hawking radiation, as suggested by Page.
Ashis Saha, Anirban Roy Chowdhury, Sunandan Gangopadhyay   +2 more
doaj   +1 more source

On the Galactic Center being the main source of galactic cosmic rays as evidenced by recent cosmic ray and gamma ray observations

New Journal of Physics, 2013
We revisit the idea that the Galactic Center (GC) is the dominant source of galactic cosmic rays (GCRs), based on a series of new observational evidence. A unified model is proposed to explain the new phenomena of GCRs and γ -rays simultaneously.
Yi-Qing Guo, Zhao-Yang Feng, Qiang Yuan, Cheng Liu, Hong-Bo Hu   +4 more
doaj   +1 more source

First detection of VHE γ-rays from SN 1006 by HESS

, 2010
Aims. Recent theoretical predictions of the lowest very high energy (VHE) luminosity of SN 1006 are only a factor 5 below the previously published HESS upper limit, thus motivating further in-depth observations of this source. Methods.
Anton, G., Astrophysics, Akhperjanian, A.G., Vink, J., Aharonian, F., Sub High energy Astrophysics begr 1/1/15, Acero, F.   +6 more
core  

THE RELATION BETWEEN POST-SHOCK TEMPERATURE, COSMIC-RAY PRESSURE, AND COSMIC-RAY ESCAPE FOR NON-RELATIVISTIC SHOCKS

, 2010
Supernova remnants (SNRs) are thought to be the dominant source of Galactic cosmic rays. This requires that at least 5% of the available energy is transferred to cosmic rays, implying a high cosmic-ray pressure downstream of SNR shocks.
Yamazaki, R, Schure, KM, Vink, J, Astrophysics, Jacco Vink, Ryo Yamazaki, Eveline A. Helder, Vink, J., Yamazaki, R., Helder, E.A., Schure, K.M., Helder, EA, K. M. Schure, Sub High energy Astrophysics begr 1/1/15   +13 more
core   +1 more source

Linear Toroidal‐Inertial Waves on A Differentially Rotating Sphere with Application to Helioseismology: Modeling, Forward and Inverse Problems

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on the sphere, the stream function of the flow satisfies a fourth‐order scalar equation.
Tram Thi Ngoc Nguyen, Damien Fournier, Laurent Gizon, Thorsten Hohage   +3 more
wiley   +1 more source

Reading the metal diaries of the universe : tracing cosmic chemical evolution from the reionization epoch till the present

, 2009
Metals are essential for star formation and their subsequent evolution, and ultimately the formation of planets and the development of life, as we know it.
Astrophysics, Vink, J., Sub High energy Astrophysics begr 1/1/15   +2 more
core  

A Low‐Power Radioisotope XRF Spectrometer for Detection of Light Elements on Planetary Missions

X-Ray Spectrometry, EarlyView.
ABSTRACT Current X‐ray spectrometers for in situ geochemical analysis on planetary missions typically rely either on X‐ray tubes, which demand electrical power and add mass and thermal complexity, or on alpha particle X‐ray spectrometers (APXS) that use rare 244Cm$$ {}^{244}\mathrm{Cm} $$ sources, and come with severe concerns on radiation safety and ...
Leandro Silveri, Artem Knyazev, Hashem Alaidaros, Maryam Manzoor Amanullah, Zach Ioannou, Tengiz Ibrayev, Danish Khan, Sara Leardini, Laura Manenti, Simi Maria Emilia Mangani, Safa Naseem, Sandhya Sharma, Sara Trevisan, Alia Zino, Francesco Arneodo   +14 more
wiley   +1 more source

Suzaku X-ray imaging and spectroscopy of Cassiopeia A

, 2009
Suzaku X-ray observations of a young supernova remnant, Cassiopeia A, were carried out. K-shell transition lines from highly ionized ions of various elements were detected, including Chromium (Cr-K˛ at 5.61 keV).
Helder, E.A., Astrophysics, Vink, J., Maeda, Y., Sub High energy Astrophysics begr 1/1/15   +4 more
core  

High/low temperature setups for submillimetric samples under various extreme conditions at the AILES beamline

Journal of Synchrotron Radiation, EarlyView.
Two complementary high‐ and low‐temperature experimental setups have been developed at the AILES beamline of Synchrotron SOLEIL to enable infrared and terahertz spectroscopy of submillimetric samples under extreme and well controlled pressure and temperature conditions (from 10 K to 600 K and from vacuum up to 100 GPa).
Cecilia Taverna, Kelly Rader, Jean Blaise Brubach, Alexander Voute, Mariia Dronova, Laurent Couillard-Labonnote, Quentin Libois, Pascale Roy, Marine Verseils   +8 more
wiley   +1 more source