Sentences with phrase «active nucleus of the galaxy»

Not exact matches

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

The bright nucleus of galaxy NGC5750 reveals the presence of an active supermassive black hole.

The leading suspects in the half - century old mystery of the origin of the highest - energy cosmic particles in the universe were in galaxies called «active galactic nuclei,» which have a super-radiating core region around the central supermassive black hole.

One alternative is the galaxy's active nucleus, with radio emission coming from jets of material emitted from the region surrounding a supermassive black hole.

In addition to the bright and chaotic features, each merging galaxy of NGC 5256 contains an active galactic nucleus, where gas and other debris are fed into a hungry supermassive black hole.

NGC 6240 is an important object to investigate in order to understand the physical and evolutional relationship among the processes of galaxy merger, the action of a starburst, and the phenomenon of an active galactic nucleus.

Although the origin of the gamma rays is still being investigated, their discovery suggests the flaring behaviour of Cygnus X-3 is an even better analogue to that of quasars and other types of flaring galaxies known as «active galactic nuclei» (AGN) than previously thought.

In 2007 astronomers working at Auger traced some of the ultrahigh - energy cosmic rays to nearby active galactic nuclei, the turbulent centers of violent galaxies.

«We're peering right down into the core of the nucleus of this active galaxy,» Readhead says.

He and his colleagues focused on the K - alpha emission line of iron, visible in the spectra of many active galactic nuclei (AGN)-- the brilliant centers of these galaxies.

In 1999, Professor Yoshiaki Taniguchi (currently at the Open University of Japan), the team leader of the current Subaru study, published a paper about the driving mechanism of the active nucleus of Seyfert galaxies such as M 77.

Although both galaxy types host voracious supermassive black holes known as active galactic nuclei, which actively swallow matter and emit massive amounts of radiation, Type I galaxies appear brighter to astronomers» telescopes.

«By putting us on a path to better understand the differences between the galaxies that host Type I and Type II active nuclei, this work will help us better understand how supermassive black holes influence the evolution of their host galaxies.»

To measure the mass and growth rate of these galaxies» active nuclei — the supermassive black holes at the galaxies» centers — the researchers used data from 12 different ground - based telescopes spread across the globe to complement the data from the Swift satellite.

After accounting for the deflection of the cosmic rays by the Milky Way's magnetic field, the team found that the particles are travelling about 326 million light years from a region of extragalactic space containing several potential sources, such as active galactic nuclei and starburst galaxies.

Quasars are believed to be powered by accretion of material onto supermassive black holes in the nuclei of distant galaxies, making these luminous versions of the general class of objects known as active galaxies.

It is a Seyfert galaxy that is dominated by something known as an Active Galactic Nucleus — its core is thought to contain a supermassive black hole that is emitting huge amounts of radiation, pouring energetic X-rays out into the universe.

Science Interests Formation of galaxies and black holes in the early universe and their growth over cosmic time; large surveys with Hubble and other telescopes to discover new populations of distant galaxies and black holes; physical properties of active galactic nuclei using observations from radio, infrared, optical, ultraviolet through to X-ray energies.

Rees is a cosmologist and space scientist whose research interests include galaxy formation, active galactic nuclei, black holes, gamma - ray bursts, as well as speculative aspects of cosmology such as the multiverse.

The top candidates, the astronomers suggested, are a neutron star, possibly a highly - magnetic magnetar, surrounded by either material ejected by a supernova explosion or material ejected by a resulting pulsar, or an active nucleus in the galaxy, with radio emission coming from jets of material emitted from the region surrounding a supermassive black hole.

From this perspective, astronomers have been actively working on the starburst regions of galaxies (* 1) and the active galactic nuclei (AGN) at the center of galaxies, which are called circumnuclear disks (CND)(* 2).

A team of scientists from 17 countries have found the most likely origin of galactic cosmic rays - the centres of distant galaxies (Active Galactic Nuclei) powered by supermassive black holes.

Blazars are active galactic nuclei — energetic regions surrounding massive black holes at the centers of galaxies.

Another idea floating around is that FRBs are emitted by active galactic nuclei, or AGNs — superluminous regions at the centers of some galaxies.

The GBT has joined Spektr - R in several observations of active galactic nuclei, the supermassive black holes lurking inside galaxies that are bright in radio waves.

The Hubble Space Telescope has imaged the nuclei of several active galaxies.

The observation demonstrates a direct connection between a supermassive black hole and activity in the nucleus of an active galaxy.

The large - scale optical and radio structures previously have been thought to indicate the symmetry axis of the active nucleus in the inner light - months of the galaxy, an idea now called into question by the new VLBA images.

Active galactic nuclei (AGN) are a type of extremely bright galaxy core seemingly fueled by powerful black holes actively gobbling large amounts of material.

To explain active galaxies, scientists must be able to explain how they emit such large amounts of energy from such small areas of the galactic nuclei.

When supermassive black holes at the center of galaxies accrete matter (usually gas), they give rise to a highly energetic phenomena named Active Galactic Nuclei (AGN).

She encouraged students to take part in this project and a number of them contributed to projects involving young stars, active galactic nuclei, and tidal dwarf galaxies.

The main science targets specific to these Hubble observations are the host galaxies of Green Double Radio - lobed Active Galactic Nuclei (Green DRAGN — pronounced Green Dragon) and Spiral Double Radio - lobed Active Galactic Nuclei (S - DRAGN).

Indeed, GRBs appear to emit produce even more energy than supernovae or even quasars (which are energetically bright accretion disks and bi-polar jets around supermassive black holes that are most commonly found in the active nuclei of some distant galaxies and possibly even in the pre-galaxy period after the Big Bang).

The European X-ray Observatory Satellite (EXOSAT), originally named HELOS, was an X-ray telescope operational from May 1983 until April 1986 and in that time made 1780 observations in the X-ray band of most classes of astronomical object including active galactic nuclei, stellar coronae, cataclysmic variables, white dwarfs, X-ray binaries, clusters of galaxies, and supernova remnants.

While other objects in the universe generate cosmic rays, most probably active galactic nuclei located far beyond our own Milky Way galaxy, supernovae in our own galactic neighborhood are thought to produce a large fraction of the cosmic rays that impact Earth.

SDSS studies have probed the dark matter environments of quasars through clustering measurements, revealed populations of quasars whose central engines are hidden by obscuring dust, captured changes in quasar spectra that show clouds moving in the gravitational grip of the central black hole, and allowed a comprehensive census of the much fainter accreting black holes (active galactic nuclei, or AGN) in present - day galaxies.