Results 21 to 30 of about 33,721 (170)

High-Energy Astrophysics in the 2020s and Beyond [PDF]

, 2019
With each passing decade, we gain new appreciation for the dynamic, connected, and often violent nature of the Universe. This reality necessarily places the study of high-energy processes at the very heart of modern astrophysics.
Arnaud, Keith, Brandt, Niel, Brenneman, Laura, Corcoran, Michael, Cornish, Neil, Gonzales, Gabriela, Lopez, Laura, Madsen, Kristin, Petre, Robert, Reynolds, Christopher   +9 more
core   +1 more source

Generalized Chemical Model for Warm Dense Hydrogen: Ionization Potential Depression and Molecular Dissociation Shifts

Contributions to Plasma Physics, EarlyView.
ABSTRACT Warm dense matter (WDM) is a complex state, where quantum effects, thermal excitations, and strong interparticle correlations coexist. Understanding its microscopic composition and medium‐induced modifications of atomic and molecular properties is essential for planetary modeling, fusion research, and high‐energy‐density experiments.
L. T. Yerimbetova, Yu. V. Arkhipov, Ye. S. Mukhametkarimov, A. E. Davletov, I. M. Tkachenko   +4 more
wiley   +1 more source

Gray Radiation Hydrodynamics with the FLASH Code for Astrophysical Applications [PDF]

, 2019
We present the newly-incorporated gray radiation hydrodynamics capabilities of the FLASH code based on a radiation flux-limiter aware hydrodynamics numerical implementation designed specifically for applications in astrophysical problems.
Chatzopoulos, Emmanouil, Weide, Klaus
core   +3 more sources

Adsorption of Helium on Cationic or Anionic Tetracene and Pentacene

Small Structures, EarlyView.
How does the arrangement of helium atoms that are adsorbed on tetracene or pentacene ions change with increasing coverage? When does the adsorption layer change from 1D to 2D, and to 3D? Is the transition abrupt? Are the helium atoms localized? Is the arrangement the same for cations and anions? What changes as the acene grows in length?
Miriam Kappe, Florent Calvo, Rasif William, Bilal Rasul, Masoomeh Mahmoodi‐Darian, Paul Scheier, Olof Echt   +6 more
wiley   +1 more source

Anomalous‐Energy Runaway Electrons Originating in Fast Ionisation Wave During Pulsed Gas Breakdown

High Voltage, EarlyView.
ABSTRACT Anomalous‐energy runaway electrons (RAEs), whose energy exceeds the maximum potential difference across the discharge gap, are widely observed in various plasma phenomena. This study investigates the origination of anomalous‐energy RAEs in fast ionisation waves (FIWs) formed during pulsed gas breakdown.
Bangdou Huang, Chenhua Ren, Cheng Zhang, Edl Schamiloglu, Tao Shao   +4 more
wiley   +1 more source

Probing the close environment of young stellar objects with interferometry

, 2003
The study of Young Stellar Objects (YSOs) is one of the most exciting topics that can be undertaken by long baseline optical interferometry. The magnitudes of these objects are at the edge of capabilities of current optical interferometers, limiting the ...
A Natta, B Reipurth, C Bertout, CJ Burrows, CP Dullemond, D Lynden-Bell, D Ward-Thompson, EI Chiang, F Malbet, F Malbet, F Malbet, FC Adams, GH Herbig, J-L Monin, JD Monnier, JP Berger, KR Stapelfeldt, L Hartmann, LA Hillenbrand, N Calvet, NI Shakura, P André, PG Tuthill, PG Tuthill, PJV Garcia, R Lachaume, R Millan-Gabet, R Millan-Gabet, R.L. Akeson, RL Akeson, RP Nelson, S Wolf, SJ Kenyon, SVW Beckwith, T Boehm, V Mendoza, V Mendoza   +36 more
core   +2 more sources

Alternative Approaches for Estimating Highest‐Density Regions

International Statistical Review, EarlyView.
Summary Among the variety of statistical intervals, highest‐density regions (HDRs) stand out for their ability to effectively summarise a distribution or sample, unveiling its distinctive and salient features. An HDR represents the minimum size set that satisfies a certain probability coverage, and current methods for their computation require ...
Nina Deliu, Brunero Liseo
wiley   +1 more source

NR/HEP: roadmap for the future [PDF]

, 2012
Physic in curved spacetime describes a multitude of phenomena, ranging from astrophysics to high-energy physics (HEP). The last few years have witnessed further progress on several fronts, including the accurate numerical evolution of the gravitational ...
Cardoso, Vitor, Sperhake, Ulrich
core  

End of a Dark Age?

, 2016
We argue that dark matter and dark energy phenomena associated with galactic rotation curves, X-ray cluster mass profiles, and type Ia supernova data can be accounted for via small corrections to idealized general relativistic spacetime geometries due to
McDevitt, Timothy, Silberstein, Michael, Sten, A. K., Stuckey, W. M.   +3 more
core   +1 more source

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source