radio source


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radio source

A celestial object whose radio emissions may be detected with a radio telescope. Within our Solar System these sources include Jupiter and the Sun, both of which emit powerful radio bursts. Galactic radio sources include pulsars, supernova remnants, H I and H II regions, maser sources, and the galactic center itself. Synchrotron emission from cosmic rays in the Galaxy gives rise to a diffuse background radiation, centered broadly on the galactic plane but having several spurs away from it (see interstellar medium). This background radiation may limit the sensitivity of a radio telescope, especially at frequencies below about 400 megahertz.

Extragalactic radio sources include spiral galaxies (whose H I and carbon monoxide emissions may be used to map the distribution of hydrogen within them), radio galaxies, and quasars. An extragalactic radio source is often classified according to the spatial distribution of the radio emission shown on a radio map of the source. See radio-source spectrum; radio-source structure.

radio source

[′rād·ē·ō ‚sȯrs]
(astrophysics)
A source of extragalactic or interstellar electromagnetic emission in radio wavelengths.
References in periodicals archive ?
Title: The luminosity function and clustering of mJy radio sources at 0.
The central radio source was previously known and has a flat radio spectrum, typical of giant radio galaxies.
A radio source said: "Everyone at the school was so excited that Will Young was going to be there, especially the children.
Invisible W50 comes by its less catchy name by being the 50th radio source listed in the Westerhout Catalog, assembled in 1958 by Dutch astronomer, Gart Westerhout.
Users are able to pause, rewind, skip forward, save and replay radio across multiple stations on any radio source - AM/FM, HD, satellite, Wi-Fi, Wi-Max and 700 MHz.
The galaxy, which is in the line of sight of a high-intensity radio source called PKS1830-211, is about seven billion light years away from Earth.
Prior to the use of R&E networks, all VLBI relied on magnetic tapes or disk packs at each site to collect continuous data at Gbps per telescope from a radio source such as a distant quasar.
In 1974, researchers discovered a compact, powerful radio source, called Sagittarius A*.
But Frail says he'll require the finer eye of another X-ray satellite, ROSAT, scheduled to observe the bursting pulsar on March 12, before he can determine whether the radio source coincides with the X-ray-emitting object.
The 26m Hartebeesthoek Radio Astronomy Observatory (HartRAO) near Pretoria teamed up with one of the seven 12m dishes currently part of the Karoo Array Telescope (KAT-7) over 900 km away to jointly observe and record data from a distant radio source known as 3C273.
In these observations, up to 20 large radio antennas spaced around the globe simultaneously gather data at rates up to 1 Gbps/antenna from a target astronomical radio source, which must all be transmitted to a central site for correlation processing.