Astrophysical processes involve the scatter and the optics of neutrons, X-rays, gamma rays, and charged and neutral particle beams, which interact in mediums of varying density, composition, and shape, with imposed electromagnetic and gravitational fields..
κν dl).
The optical depth is a convenient way to refer to the "thickness" of a cloud.
It basically measures how many e-foldings of intensity reduction the cloud's thickness represents.
A cloud with τν \x26gt;\x26gt; 1 is said to be optically thick, while a cloud with τν \x26lt;\x26lt; 1 is optically thin..
Radiation astronomy is astronomy applied to the various extraterrestrial sources of radiation, especially at night.
It is also conducted above the Earth's atmosphere and at locations away from the Earth, by satellites and space probes, as a part of explorational (or exploratory) radiation astronomy..
\x26lt; Radiation.
Radiation astronomy is astronomy applied to the various extraterrestrial sources of radiation, especially at night.
It is also conducted above the Earth's atmosphere and at locations away from the Earth, by satellites and space probes, as a part of explorational (or exploratory) radiation astronomy..
Radiative transfer (also called radiation transport) is the physical phenomenon of energy transfer in the form of electromagnetic radiation.
The propagation of radiation through a medium is affected by absorption, emission, and scattering processes..
Synchrotron radiation is ubiquitous in astronomy.
It accounts for most of the radio emission from active galactic nuclei (AGNs) thought to be powered by supermassive black holes in galaxies and quasars, and it dominates the radio continuum emission from star-forming galaxies like our own at frequencies below ν∼30 GHz..
bremsstrahlung, (German: “braking radiation”), electromagnetic radiation produced by a sudden slowing down or deflection of charged particles (especially electrons) passing through matter in the vicinity of the strong electric fields of atomic nuclei..
Synchrotron radiation is the electromagnetic radiation emitted when charged particles travel in curved paths.
Because in most accelerators the particle trajectories are bent by magnetic fields, synchrotron radiation is also called Magneto-Bremsstrahlung..
In particle physics, a radiative process refers to one elementary particle emitting another and continuing to exist.
This typically happens when a fermion emits a boson such as a gluon or photon..
NASA has launched two missions to study the cosmic background radiation, taking "baby pictures" of the Universe only 400,000 years after it was born
The first of these was the Cosmic Background Explorer (COBE)
In 1992, the COBE team announced that they had mapped the primordial hot and cold spots in cosmic background radiation
An introduction to the basic physics of astronomy and astrophysics at the graduate level
Principles of energy transfer by radiation
Elements of classical and quantum theory of photon emission; bremsstrahlung, synchrotron radiation
Compton scattering, plasma effects, atomic and molecular electromagnetic transitions
The first volume deals with the emission, absorption, and scattering of radiation by matter, as well as covering related topics such as radiative transfer, statistical physics, classical electrodynamics, and atomic and molecular structure
Translated into Greek
