Sentences with phrase «many active galactic nuclei»

Another culprit might be active galactic nuclei (AGN), which are blazingly strong light sources powered by black holes.

He notes that the model was originally developed for active galactic nuclei — outbursts powered by supermassive black holes — so there is no reason to think it must also apply to gamma - ray bursts.

One possibility was that they are spat out by «active galactic nuclei» (AGNs)-- energetic galaxies powered by matter swirling onto a supermassive black hole.

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

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.

Some active galactic nuclei are accompanied by powerful relativistic jets.

«Our work demonstrates that the ultrahigh - energy cosmic rays escaping from active galactic nuclei and their environments such as galaxy clusters and groups can explain the ultrahigh - energy cosmic - ray spectrum and composition.

To excite the voorwerp's glow, the black hole and its surrounding accretion disk, the active galactic nucleus, or AGN, should have had the brightness of about 2.5 trillion suns; its radio emission, however, suggested the AGN emitted the equivalent of a relatively paltry 25,000 suns.

It may be the result of an active galactic nucleus, where energy is gushing from a supermassive black hole.

Quasar An active galactic nucleus derives its high energy from gas accreting on the center of 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.

The emission instead originates from an active galactic nucleus that is powered by a supermassive black hole.

«There's a general consensus that the very brightest active galactic nuclei are the result of major mergers,» he says, «but for the run - of - the - mill AGNs, other processes might be more important.»

He is a specialist on active galactic nuclei, superbright galactic cores thought to be caused by giant black holes sucking in and heating up quantities of gas and dust.

Such an «active galactic nucleus» (AGN) presumably arises when ultrahot gas falls into a galaxy's central black hole, and common wisdom held that the matter is tipped into the black hole when galaxies collide.

The central region of M77 is an «active galactic nucleus,» or AGN, which means that matter is vigorously falling toward the central supermassive black hole and emitting intense light.

Among the most luminous things in the universe are active galactic nuclei (AGN): gigantic black holes that can emit as much energy as 10 billion suns.

However, at high redshifts we require active, continuous accretion to infer the presence of the SMBHs, which often comes in the form of long - term accretion in active galactic nuclei.

She shared some of her first observations of how these accretion disks operate in brilliant active galactic nuclei, or AGNs.

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.

So, how can the angular momentum be removed from the gas circling near an active galactic nucleus?

We expect that the project can provide a critical piece for the unified picture for the triggering mechanism for active galactic nuclei.»

In some active galactic nuclei, you have a black hole and accretion disk and the majority of the power is associated with these outflowing jets, far more than is associated with the radiant energy that is emitted by the accretion disk and the hot gas surrounding it.

A popular theory known as the «unified theory» suggests that differences in the brightness of active galactic nuclei, as seen from here on Earth, are due to the placement of this donut of obscuring dust relative to our angle of observation.

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.

«The best part of this project for me was learning about active galactic nuclei and supermassive black holes on a level I never could have in either undergraduate or graduate classroom settings.»

The discovery gives crucial evidence for the minor merger origin of active galactic nuclei.

The most likely explanations involve radiation or outflows from an active galactic nucleus (AGN) that is strongly obscured by dust so that only a faint source can be seen associated with the nebula.

However, new research suggests that two of the most common types of active galactic nuclei do, in fact, exhibit fundamental physical differences in the way they consume matter and spit out energy.

Many active galactic nuclei are surrounded by large, dark, donut - shaped clouds of gas and dust, as seen in this artist's rendering.

Nobody is sure, but attention will now shift to active galactic nuclei powered by supermassive black holes.

There have been a number of mechanisms proposed for quenching, for example «feedback» from supernovae or active galactic nuclei which breaks up the star forming clouds and reduces the star formation rate, but the measurement and verification of yet other possible processes is of great importance.

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.

Attention will now shift to active galactic nuclei (AGN), which are powered by supermassive black holes.

The source directions of the most energetic cosmic rays correlate with locations of nearby active galactic nuclei, implying that they form from supermassive black holes.

Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above 6 × 1019 electron volts and the positions of active galactic nuclei (AGN) lying within ∼ 75 megaparsecs.

In this process, the material heats up and becomes very bright — becoming the most energetic sources of emission in the universe known as active galactic nuclei (AGN).

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.

These include radio galaxy hot spots and active galactic nuclei (AGN) jets.

These throbbing galactic hearts are known as «active galactic nuclei,» or AGN, and, in new research published online in the journal Nature on Sept. 27, an international group of researchers have upended a bedrock theory (the unified theory) that astronomers thought characterized these AGN.

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).

M77 is known to have an active galactic nucleus (AGN) at its center which is surrounded by a starburst ring with a radius of 3500 light years.

The brightest type of active galactic nucleus, believed to be powered by a supermassive black hole.

With the idea of developing strong science cases for a future visible interferometer, we organized a science group around the following topics: pre-main sequence and main sequence stars, fundamental parameters, asteroseismology and classical pulsating stars, evolved stars, massive stars, active galactic nuclei (AGNs) and imaging techniques.

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

The nuclear region of M87 is known as an «active galactic nucleus» due to its brightness in visible, x-ray, radio, and other wavelengths of light.