Once one such radio galaxy had been identified, others soon followed.

This means that it is also classified as a radio galaxy.

This is the essence behind the connection between blazars and radio galaxies.

This indicates that it may have once been an active quasar or radio galaxy.

Like all radio galaxies, it contains an active galactic nucleus.

See main article Radio galaxy for a discussion of the large-scale behaviour of the jets.

Arp 187 is a radio galaxy located in the constellation Eridanus.

However, the population of radio galaxies is completely dominated by low-luminosity, low-excitation objects.

Some work has been done attempting to use radio galaxies as standard rulers to determine cosmological parameters.

Though signals from radio galaxies have been detected before, the "space roar" sounds six times louder than predicted.

Because radio galaxies are so bright, astronomers have used them to probe extreme distances and early times in the evolution of the universe.

Some may be radio-quiet analogues of the low-excitation radio galaxies (see below).

This method is fraught with difficulty because a radio galaxy's size depends on both its age and its environment.

When a model of the radio source is used, though, methods based on radio galaxies can give good agreement with other cosmological observations.

He specializes in radio galaxies, X-ray binary systems, astrometry, and general relativity.

A few other galaxies are radio galaxies.

The host galaxies of radio galaxies, whatever their emission-line type, are essentially always ellipticals.

Many galaxies are strong radio emitters, called radio galaxies.

In 1974, along with Fanaroff, she wrote a famous paper classifying radio galaxies into two types based on their morphology (shape).

A radio galaxy emits radio frequencies from relativistic jets.

Radio galaxies.

It is classified as a Fanaroff & Riley type II radio galaxy.

Radio galaxies are almost universally found hosted by elliptical galaxies, though there is one well-documented exception.

In order to study the origin of these jets, scientists frequently turn to the giant radio galaxy M 87, which is located 50 million light years away.