Astronomical radio source

[2] As the nearest star, the Sun is the brightest radiation source in most frequencies, down to the radio spectrum at 300 MHz (1 m wavelength).

[3] Oscillation of electrons trapped in the magnetosphere of Jupiter produce strong radio signals, particularly bright in the decimeter band.

As Io moves through this torus, the interaction generates Alfvén waves that carry ionized matter into the polar regions of Jupiter.

As a result, radio waves are generated through a cyclotron maser mechanism, and the energy is transmitted out along a cone-shaped surface.

Rotating radio transients (RRATs) are a type of neutron stars discovered in 2006 by a team led by Maura McLaughlin from the Jodrell Bank Observatory at the University of Manchester in the UK.

Short radio waves are emitted from complex molecules in dense clouds of gas where stars are giving birth.

Quasars' extreme redshift led us to conclude that they are distant active galactic nuclei, believed to be powered by black holes.

D. R. Lorimer and others analyzed archival survey data and found a 30-jansky dispersed burst, less than 5 milliseconds in duration, located 3° from the Small Magellanic Cloud.

In a recent paper, they argue that current models for the free electron content in the universe imply that the burst is less than 1 gigaparsec distant.

The fact that no further bursts were seen in 90 hours of additional observations implies that it was a singular event such as a supernova or coalescence (fusion) of relativistic objects.

Under these conditions, simple fluctuations in the density of matter may have resulted in local regions dense enough to create black holes.

Although most regions of high density would be quickly dispersed by the expansion of the universe, a primordial black hole would be stable, persisting to the present.

Martin Rees has theorized that a black hole, exploding via Hawking radiation, might produce a signal that's detectable in the radio.

[citation needed] Explaining their discovery in 2005 of a powerful bursting radio source, NRL astronomer Dr. Joseph Lazio stated:[23] "Amazingly, even though the sky is known to be full of transient objects emitting at X- and gamma-ray wavelengths, very little has been done to look for radio bursts, which are often easier for astronomical objects to produce."

The use of coherent dedispersion algorithms and the computing power provided by the SETI network may lead to discovery of previously undiscovered phenomena.