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Spectral lines, widths, and shapes are powerful tools for emitting/absorbing gas diagnostics in different astrophysical objects (from the solar system to the most distant objects in the universe—quasars). On the other hand, experimental and theoretical investigations of laboratory plasma have been applied in spectroscopic astrophysical research, especially in research on atomic data needed for line shape calculations. Data on spectral lines and their profiles are also important for diagnostics, analysis, and the modelling of fusion plasma, laser-produced plasma, laser design and development, and various plasmas in industry and technology, like light sources based on plasmas or the welding ...
This Special Issue covers a wide range of topics from fundamental studies to applications of ionized gases. It is dedicated to four topics of interest: 1. ATOMIC COLLISION PROCESSES (electron and photon interactions with atomic particles, heavy particle collisions, swarms, and transport phenomena); 2. PARTICLE AND LASER BEAM INTERACTION WITH SOLIDS (atomic collisions in solids, sputtering and deposition, and laser and plasma interactions with surfaces); 3. LOW TEMPERATURE PLASMAS (plasma spectroscopy and other diagnostic methods, gas discharges, and plasma applications and devices); 4. GENERAL PLASMAS (fusion plasmas, astrophysical plasmas, and collective phenomena). This Special Issue of Atoms will highlight the need for continued research on ionized gas physics in different topics ranging from fundamental studies to applications, and will review current investigations.
The last 50 years have seen a tremendous progress in the research on quasars. From a time when quasars were unforeseen oddities, we have come to a view that considers quasars as active galactic nuclei, with nuclear activity a coming-of-age experienced by most or all galaxies in their evolution. We have passed from a few tens of known quasars of the early 1970s to the 500,000 listed in the catalogue of the Data Release 14 of the Sloan Digital Sky Survey. Not surprisingly, accretion processes on the central black holes in the nuclei of galaxies — the key concept in our understanding of quasars and active nuclei in general — have gained an outstanding status in present-day astrophysics. Acc...
Even prior to his death on 15 November 1280, the Dominican master Albert of Lauingen was legendary on account of his erudition. He was widely recognized for the depth and breadth of his learning in the philosophical disciplines as well as in the study of God, earning him the titles Doctor universalis and Doctor expertus. Moreover, his authoritative teaching merited him the moniker Magnus, an appellation bestowed on no other man of the High Middle Ages. This volume contains the first half of Albert the Great’s commentary On Job (on chs. 1-21), translated into English for the first time; a translation of the second half of the work will appear in a subsequent volume of the Fathers of the Chu...
Planetary nebulae present a fascinating range of shapes and morphologies. They are ideal laboratories for the study of different astrophysical processes: atomic physics, radiative transfer, stellar winds, shocks, wind-wind interaction, and the interaction between stellar winds and the interstellar medium. In addition, planetary nebulae provide information about the late stages of stellar evolution. In the last five years studies of planetary nebulae have progressed very rapidly and new phenomena and insights have been gained. This is partly due to new observations (e.g. from the Hubble Space Telescope, the ISO satellite and new infrared and millimeter spectrographs) and partly to the advance...
Proceedings of the Sixth European Regional Meeting in Astronomy, held in Dubrovnik, Yugoslavia, October 19-23, 1981
This book consists of 24 papers on ancient Greek science and technology. It covers such areas as mathematics, physics, engineering, astronomical methods and instruments, and environmental issues. A great variety of topics are discussed, including medical care in ancient Olympiads, mathematical concepts in Plato, the concept of the rate of change in various mathematical areas and the concept of symmetry in ancient Greece. Aristotle’s Physics on free falling bodies, world-structure formation and matter according to the Presocratics, acoustic phenomena in archaeological sites, Trojan Horse reconstruction, offensive and defensive weapons in Homer’s epics, and telecommunications in ancient Greece are also some of the issues addressed here. This book will be an important resource to physicists, mathematicians, engineers, archaeologists, historians, and philologists.
The VI Serbian Conference on Spectral Line Shapes in Astrophysics was about the investigation of spectral line shapes in extragalactic objects, such as, active galactic nuclei, stellar atmospheres, and astrophysical spectra in general. Atomic spectral line shapes in various discharges and plasma devices was also discussed. The main purpose of the Conference was to present and discuss new results found by participants working in this research field, and to review significant topics.