Results 71 to 80 of about 2,752,786 (196)

Theoretical Study of Electron Capture, Excitation, and Ionization Processes in H+−H(2l) Collisions

The Astrophysical Journal Supplement Series
The processes of single-electron charge exchange, excitation, and ionization during proton impact on H(2 l ) are investigated. We employ two different theoretical methods that are suitable for different collision energy regions: the full quantum ...
Y. Wang, K. Wang, L. Liu, Y. Wu, F. Wang, J. G. Wang   +5 more
doaj   +1 more source

Strong Field QED, Astrophysics, and Laboratory Astrophysics

Astrophysical compact objects, such as magnetars, neutron star mergers, etc, have strong electromagnetic fields beyond the Schwinger field ($B_c = 4.4 \times 10^{13}\, {\rm G}$). In strong electric fields, electron-positron pairs are produced from the vacuum, gamma rays create electron-positron pairs in strong magnetic fields, and propagating photons ...
openaire   +2 more sources

Measurement and Modeling of Electron Temperature in Laboratory Photoionized Plasmas Relevant to Astrophysics

The Astrophysical Journal
The electron temperature of photoionized plasmas characterizes the thermalization of photoelectrons, impacts the charge-state distribution, emissivity, and opacity through atomic recombination processes, and is needed to perform detailed comparisons with
J. J. Rowland, R. C. Mancini, G. S. Jaar, D. C. Mayes, H. Scott, I. E. Golovkin, M. Chatzikos, G. Ferland, G. P. Loisel, J. E. Bailey   +9 more
doaj   +1 more source

Evolution of slow electrostatic shock into a plasma shock mediated by electrostatic turbulence

New Journal of Physics, 2014
The collision of two plasma clouds at a speed that exceeds the ion acoustic speed can result in the formation of shocks. This phenomenon is observed not only in astrophysical scenarios, such as the propagation of supernova remnant (SNR) blast shells into
M E Dieckmann, G Sarri, D Doria, H Ahmed, M Borghesi   +4 more
doaj   +1 more source

Laboratory high-energy astrophysics on lasers [PDF]

, 1994
The tremendous range of temperatures and densities spanned by astrophysical plasmas has significant overlap with conditions attainable using high-power laser facilities. These facilities provide an opportunity to create, control, and characterize plasmas
Wilson, B. G., Osterheld, A. L., Liedahl, D. A., Walling, R. S., Goldstein, W. H., Foord, M. E.   +5 more
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Dissociation and Cooling Dynamics of 2-cyanoindene Monocations: Survival of Small PAHs in Harsh Interstellar Radiation Fields

The Astrophysical Journal
The molecule, 2-cyanoindene, C _10 H _7 N (2CNI) is the only cyanosubstituted polycyclic aromatic hydrocarbon (PAH) detected in space, for which the hydrocarbon counterpart, indene, has also been observed in the same astrochemical environment—the ...
Arun Subramani, James Flotte de Pouzols, Paul Martini, José E. Navarro Navarrete, Eleanor K. Ashworth, James N. Bull, Gustavo A. Garcia, Laurent Nahon, Bérenger Gans, Ugo Jacovella, Corentin Rossi, Henrik Cederquist, Henning T. Schmidt, Henning Zettergren, Mark H. Stockett   +14 more
doaj   +1 more source

High Energy Density Laboratory Astrophysics

, 2004
High-energy-density (HED) physics refers broadly to the study of macroscopic collections of matter under extreme conditions of temperature and density.
Remington, B. A.
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The A2Π–X2Σ+ Band System of ScO for M-type Star Spectral Analysis

The Astrophysical Journal
M-type stars are the most abundant stars in our Galaxy. Their visible spectra are characterized by strong TiO and VO absorption bands with occasional ScO bands near 6000–6100 Å.
Léo Lavy, Adam Pastorek, Peter F Bernath   +2 more
doaj   +1 more source

Nuclear astrophysics in underground laboratories: The LUNA experiment [PDF]

AIP Conference Proceedings, 2019
Abstract One of the main ingredients of nuclear astrophysics is the knowledge of the thermonuclear reactions responsible for powering the stellar engine and for the synthesis of the chemical elements. At astrophysical energies the cross section of nuclear processes is extremely reduced by the effect of the Coulomb barrier.
openaire   +2 more sources

ASTR 224 Astronomy and Astrophysics Laboratory [PDF]

, 2015
Syllabus for ASTR 224 Astronomy and Astrophysics Laboratory for Fall ...
Smith, Zachary
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