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An astronomical radio source is an object in outer space that emits strong radio waves. Learn about the history, sources, and types of radio sources, from the Sun and Jupiter to quasars and pulsars.
The term quasar originated as a contraction of "quasi-stellar [star-like] radio source"—because they were first identified during the 1950s as sources of radio-wave emission of unknown physical origin—and when identified in photographic images at visible wavelengths, they resembled faint, star-like points of light.
Stellar radio sources, radio source stars or radio stars are stellar objects that produce copious emissions of various radio frequencies, whether constant or pulsed. Radio emissions from stars can be produced in many varied ways.
21 ώρες πριν · Fast radio bursts (FRBs) are millisecond-duration events detected from beyond the Milky Way. FRB emission characteristics favour highly magnetized neutron stars, or magnetars, as the sources 1, as ...
18 Σεπ 2017 · It is now known that there is a continuum of galaxy properties, ranging from pure star-forming galaxies, such as our own Galaxy, whose radio output is dominated by stellar evolution processes,...
17 Φεβ 2020 · Low-frequency radio emission from a normally quiescent M dwarf star suggests a radio aurora generated by the interaction between the stellar corona and an undetected Earth-sized planet.
1 Νοε 2023 · Quasars are the bright centers of distant galaxies powered by supermassive black holes. Learn how they were first detected as radio sources, what they reveal about galaxy formation and evolution, and how they have been studied with modern telescopes.
