Sentences with phrase «central black hole»

Further analysis allowed the scientists to determine which of the objects are galaxies containing massive central black holes that are actively consuming surrounding material and which are galaxies undergoing rapid bursts of star formation.

For reasons not fully understood, it appears that the sizes of central black holes and the masses of their galaxies, especially the central bulges, are almost perfectly in step

On October 16, 2002, the European Southern Observatory (ESO) announced that a team of astronomers (led by researchers at the Max - Planck - Institute for Extraterrestrial Physics (MPE)-RRB- had developed strong evidence of the existence of a supermassive central black hole in the Milky Way, by plotting out about two - thirds of S2's orbit around an apparent superdense object, using direct infrared and radio observations of the star's orbital motion since 1992.

Their analysis credited the monstrous central black hole with a mass of 6.4 billion suns — much more than was expected (The Astrophysical Journal, DOI: 10.1088 / 0004 - 637X / 700 / 2/1690).

Most galaxies in the universe revolve around central black holes, which feed voraciously on galactic gas and dust and spew out radiation.

The two ellipticals without cold gas have incredibly active central black holes at their cores, which are accreting material at a breakneck pace and launching energetic jets out into space, researchers said.

In December 2011, astronomers identified the gas cloud, called G2, and found that its orbit would bring it perilously close to the Milky Way's central black hole by mid-2013.

These gas - filled limbs are often where new stars form, and can constrain how big a galaxy's central black hole grows.

The cluster has been orbiting the supermassive central black hole roughly once every 100 years.

Many distant quasars — luminous galaxies, thought to be powered by large central black holes — are known to contain warm dust, which glows at infrared wavelengths.

These violent events shake up the galaxy's gas to form new stars and globular clusters, stir up the disc so it spreads farther out, and perhaps send some gas and stars plunging into the galactic heart to feed a more monstrous central black hole.

If galaxies that have never been through a merger, like NGC 4178 — detectable by their lack of stellar bulges — have their own central black holes, their properties could help tell the story.

Many galaxies, including the Milky Way, harbor central black holes that weigh millions or even billions of times as much as our sun.

After billions of years, the dwarf's central black hole made it to the galactic core and began a tight gravitational tango with the Milky Way's supermassive black hole.

Other evidence comes from the analysis of modern galaxies, most of which have central black holes whose masses seem to correlate closely with the properties of their host galaxies.

Oscillations in x-ray emission from a galaxy's central black hole imply that a disc formed after the hole captured a star.

Previous estimates of the distance to NGC 4151's central black hole relied on measurements of redshift — how wavelengths of light are lengthened by an object's motion away from Earth - based observers.

Webb will investigate our strangely calm central black hole, providing a more accurate measurement of its mass, as well as how much material is falling into it, and when.

By comparison, the Milky Way's central black hole believed to contain less than three million Solar - masses (more discussion).

Astronomers believe that supermassive, central black holes generate the radio, X-ray, and gamma - ray energy radiated by active galaxies such as Centaurus A, as well as quasars like SDSS J1030 +0524.

For reasons not fully understood, it appears that the sizes of central black holes and the masses of their galaxies, especially the central bulges, are almost perfectly in step [perfectly correlated].40

And views in x-ray light (not shown) reveal super-powerful jets of matter squirting from the galaxy's central black hole at nearly the speed of light.

Although these outflows are most likely to be driven by massive central black holes, it is also possible that the winds are powered by supernovae in a starburst nucleus undergoing vigorous star formation.

Here's the problem for those who believe a big bang preceded the formation of black holes, stars, and galaxies: black holes are too small to affect something as huge as a galaxy that formed long after the universe expanded, and there is no reason a galaxy should form a large central black hole.

Most major galaxies harbor supermassive central black holes.

Today you may observe a project aimed at detecting prebiotic molecules on a forming star, a galaxy being swallowed by its own central black hole, or the formation of a solar system that could have a rocky planet covered with oceans that might harbor life, who knows.

In the rare case that the parent galaxy that merges with the DCBH also hosts a central black hole, the two holes will collide and release powerful gravitational waves.

Data suggest that central black holes might play an important role in adjusting how many stars form in the galaxies they inhabit.

In general, the stars in a galaxy outweigh the central black holes by about a factor of 1,000.

Galaxies that appear redder have high values for both of these measurements, meaning that the mass of the bulge — and central black hole — determines their colour.

Its central black hole devours vast amounts of gas and spews out a huge jet of particles that extends far into intergalactic space.

According to Lauer, the observations can be explained if the stars are orbiting a central black hole with a mass of about 3 million times that of the Sun.

He leads a team that plans to directly image the event horizon of the Milky Way's central black hole.

The Milky Way's central black hole, which weighs about 4 million times the mass of the sun, is relatively dormant.

Most galaxies like the Milky Way harbour a central black hole with a mass upwards of a million suns.

Astronomers thought these features pointed to a precession of the central black hole, much as Earth's spin axis wobbles over time.

When galaxies collide, their central black holes may collide as well.

The Milky Way's central black hole has been closely studied.

These days the Milky Way's central black hole, called Sagittarius A *, seems fairly placid.

As gas falls toward the central black hole, before it disappears from the universe forever, it becomes so hot that it emits X-rays, which astronomers can collect and plot on a spectrum.

Observations of the galaxy MCG -6-30-15 suggest that the spinning of its central black hole is producing power just like an electric generator.

The central black hole, they believe, is girdled by a thin disk of gas that is spiraling inward toward doom.

«Usually distant galaxies do not change significantly over an astronomer's lifetime, i.e. on a timescale of years or decades,» explains Andrea Merloni, «but this one showed a dramatic variation of its spectrum, as if the central black hole had switched on and off.»

The bright discs of gas around a galaxy's central black hole are thought to be obscured by a torus of dust.

The Milky Way's central black hole is currently quiet, but if for some reason it roared to life again, it could spew out deadly gamma rays and x-rays, possibly in our direction.

This gave the astronomers unique information about the high - energy emission that reveals how material is processed in the immediate vicinity of the central black hole.

Some unlucky ones may happen to pass too close to the central black hole, where they are destroyed and eventually swallowed by the black hole.

Then, the team performed the same trick to gauge the mass of the diffuse spherical «bulge» of billions of stars that surrounds each central black hole.

Some 290 million years ago, a star much like the sun wandered too close to the central black hole of its galaxy.

The team used the SINFONI instrument on ESO's Very Large Telescope and also monitored the behaviour of the central black hole region in polarised light using the NACO instrument.