Not exact matches
«The
gas which forms the major part of the insterstellar medium,» explains Jorge García Rojas, a researcher at the IAC who is the first author on the paper «can be observed because its
atoms are
ionized by the photons emitted by the hot stars embedded inside it (which can either very massive stars, or white dwarfs, which are also very hot).
As our solar system slowly orbits around the galactic center, the sun's ultraviolet radiation carves out an egg - shaped region of
ionized hydrogen
atoms surrounded by neutral hydrogen
gas.
The
gas in the accretion disk is hot enough for some of its
atoms to lose electrons and become
ionized — that is, to take on a positive electric charge.
Another way is also possible: At a temperature of millions of degrees, the
gas in the corona is highly
ionized, that is, electrons are stripped off neutral
atoms and move freely.
Scientists hypothesize that the missing
atoms lie in diffuse clouds of highly
ionized gas stretching between the galaxies.
Yet in strongly shocked
gases, the
atoms are
ionized into electrons and ions.