What they have in common, astronomers say, are very active galactic nuclei.

This emission is actually quite common for active galactic nuclei.

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

A hard X-ray source at the center most likely indicates an active galactic nucleus.

If it has an active galactic nucleus, this may reduce the mass estimate to half the current value.

But a new survey of active galactic nuclei suggests that this model may need some serious revision.

In particular, both display the radio jets characteristic of many active galactic nuclei.

He works on active galactic nuclei and the theory of dust tori.

Many are starburst galaxies, and some also contain an active galactic nucleus.

Active galactic nuclei, which power quasars, are the most energetic objects we're aware of.

When people went looking for active galactic nuclei, they often found them in galaxies that were undergoing mergers.

At the core, most galaxies have a supermassive black hole, which may result in an active galactic nucleus.

The study does not include any spectroscopic discrimination between the stellar and active galactic nucleus component.

Active galactic nuclei have also been studied in the area, for example MBC2005.

Gas taken up by the combined black hole could create a luminous quasar or an active galactic nucleus.

His fields of specialty include active galactic nuclei, cosmology, and radio astronomical techniques.

They are thought to be the primary driver of active galactic nuclei found at the core of some galaxies.

The project started in 1995, and with telescope observations starting in 2000 for the scientific study of active galactic nuclei.

Included are supernovae, Flare star, blazars and active galactic nuclei.

Their answer: these particles come from active galactic nuclei, supermassive black holes at the center of some galaxies.

Proposed sites for this type of acceleration include gamma ray bursts and active galactic nuclei.

His current areas of research include galaxy clusters, active galactic nuclei, strong gravity, black holes and the X-ray background.

In March 2010 it was announced that active galactic nuclei are not responsible for most gamma-ray background radiation.

Quasars' extreme red shift led us to conclude that they are distant active galactic nuclei.

Because neutrinos pass through most matter (including the seafloor), scientists can use them to peer into active galactic nuclei.