Results 21 to 30 of about 1,520 (178)
Gamma Rays as Probes of Cosmic-Ray Propagation and Interactions in Galaxies
Universe, 2021 Continuum gamma-ray emission produced by interactions of cosmic rays with interstellar matter and radiation fields is a probe of non-thermal particle populations in galaxies. After decades of continuous improvements in experimental techniques and an ever-
Luigi Tibaldo +2 more
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Dust in protoplanetary disks: observations*
EPJ Web of Conferences, 2015 Solid particles, usually referred to as dust, are a crucial component of interstellar matter and of planet forming disks surrounding young stars. Despite the relatively small mass fraction of ≈1% (in the solar neighborhood of our galaxy; this number may ...
Waters L.B.F.M.
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Consequences of the Solar System passage through dense interstellar clouds [PDF]
Annales Geophysicae, 2003 Several consequences of the passage of the solar system through dense interstellar molecular clouds are discussed. These clouds, dense (more than 100 cm-3), cold (10–50 K) and extended (larger than 1 pc), are characterized by a gas-to-dust mass ...
A. G. Yeghikyan +2 more
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Synthetic Approaches to Complex Organic Molecules in the Cold Interstellar Medium
Frontiers in Astronomy and Space Sciences, 2022 The observation and synthesis of organic molecules in interstellar space is one of the most exciting and rapidly growing topics in astrochemistry.
Eric Herbst +3 more
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Transactions of the International Astronomical Union, 1985 It has become more evident during the last three years that the study of interstellar matter is paramount to understand the evolution of the universe and its constituents. From observations of the present state of the interstellar medium, in our galaxy, in other galaxies, and between galaxies, it is possible to test theories of: evolution of the ...
M. Peimbert +10 more
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SciPost Physics Proceedings, 2023 After more than a decade since its discovery, the Galactic center gamma-ray excess - discovered with the Fermi Large Area Telescope - remains puzzling. While the spectrum of the signal can be explained by either dark matter or an unresolved population of
Oscar Macias, Martin Pohl, Chris Gordon, Phaedra Coleman
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ABOUT THE SPACE DISTRIBUTION OF STARS IN THE SELECTED SKY FIELDS
Odessa Astronomical Publications, 2017 By the results of a photometry of stars in six Captain Areas, located near to a galactic plane, the densities of absorbing matter and space distribution of stars in these sky fields are determined.
A. V. Dragunova, M. P. Yasinskaya
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Opacities and Atomic Diffusion
Galaxies, 2023 Opacity is a fundamental quantity for stellar modeling, and it plays an essential role throughout the life of stars. After gravity drives the collapse of interstellar matter into a protostar, the opacity determines how this matter is structured around ...
Georges Alecian, Morgan Deal
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Angewandte Chemie, Volume 138, Issue 25, 15 June 2026.By employing dimensionally reduced reaction descriptors, a human–machine collaboration framework for efficient electrochemical nitrate reduction to NH3 electrocatalysts screening is established and drastically shorten the discovery timeframe. A new kinetic model is established in combination with a rotating ring‐disk electrode, unveiling the pivotal ...
Yingying Cheng +3 more
wiley +2 more sources
ChemPhysChem, Volume 26, Issue 6, March 15, 2025.The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida +3 more
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