There it is shown that small - amplitude vacuum density waves generated by the motion of
the supermassive objects located in the center of the Galaxy are constantly acting on the Sun and the Earth and are thereby producing a series of physical reactions within these celestial bodies.
But for large black holes, like
the supermassive objects at the cores of galaxies like the Milky Way, which weigh tens of millions if not billions of times the mass of a star, crossing the event horizon would be, well, uneventful.
Although stars can never attain that much mass, Albert Einstein's 1916 general theory of relativity put Michell's hunch about
supermassive objects onto solid theoretical ground.
Astronomers have found clear evidence of tiny but
supermassive objects there, pulling on stars and stirring up hot disks of gas.
The team figured out what a telescope would see when a star hit the hard surface of
a supermassive object at the center of a nearby galaxy: The star's gas would envelope the object, shining for months, perhaps even years.
But some theorists suggest that there's something else there instead — not a black hole, but an even stranger
supermassive object that has somehow managed to avoid gravitational collapse to a singularity surrounded by an event horizon.
The black hole came into existence billions of years ago, perhaps as very massive stars collapsed at the end of their life cycles and coalesced into a single,
supermassive object, Ghez said.
Lying at the center of M87 is
a supermassive object, which has swallowed up a mass equivalent to 2 billion times the mass of our Sun.
Not exact matches
Computational analysis of Sloan's prodigious data set has uncovered evidence of some of the earliest known astronomical
objects, determined that most large galaxies harbor
supermassive black holes, and even mapped out the three - dimensional structure of the local universe.
It will also pick up lower frequency waves, showing us a different set of
objects, such as pairs of
supermassive black holes.
But around a
supermassive black hole,
objects zip around so fast that crashes would happen at up to 1000 kilometres per second, pulverising the colliding
objects.
Doing so would make it possible to detect gravitational waves, faint ripples in space - time that, according to Einstein, emanate from interactions between massive
objects like neutron stars and
supermassive black holes.
Whether around a young star or a
supermassive black hole, the many mutually interacting
objects in a self - gravitating debris disk are complicated to describe mathematically.
Doing so would make it possible to detect gravitational waves, faint ripples in space - time that, according to Einstein, emanate from interactions between massive
objects such as neutron stars and
supermassive black holes.
They could have emerged from gamma - ray bursts, mysterious and short - lived cataclysms that briefly rank as the brightest
objects in the universe; shock waves from exploding stars; or so - called blazars, jets of energy powered by
supermassive black holes.
Quasars are considered «active» galaxies because the bright
objects are powered by
supermassive black holes that are devouring their surroundings.
Most astronomers think that these
objects generate their enormous amounts of energy as gravity and friction heat material that falls into a central «
supermassive» black hole.
The
objects causing these low - frequency ripples — such as orbiting
supermassive black holes at the centers of distant galaxies — would be different from the higher frequency ripples, emitted by collisions of much smaller black holes, that have so far been detected on Earth.
Together, the three examples suggest that black holes lurk at the center of most of these
objects, potentially doubling the number of
supermassive black holes known in the universe.
The mergers that formed NGC 1316 led to an influx of gas, which fuels an exotic astrophysical
object at its centre: a
supermassive black hole with a mass roughly 150 million times that of the Sun.
VUCD3 and M59cO are the second and third ultra-compact dwarf galaxies found to contain a
supermassive black hole, suggesting that all such dwarfs may harbor similarly massive light - sucking
objects.
«High - energy neutrinos are produced along with gamma rays by extremely high - energy radiation known as cosmic rays in
objects like star - forming galaxies, galaxy clusters,
supermassive black holes, or gamma - ray bursts.
Why these
objects are so much brighter than ordinary
supermassive black holes has long puzzled researchers.
An unusual
object about 90 million light - years from Earth might be a
supermassive black hole kicked out of its home galaxy during a collision with another galaxy, a new study suggests.
Two teams of astronomers led by researchers at the University of Cambridge have looked back nearly 13 billion years, when the Universe was less than 10 percent its present age, to determine how quasars — extremely luminous
objects powered by
supermassive black holes with the mass of a billion suns — regulate the formation of stars and the build - up of the most massive galaxies.
Supermassive black holes are enormously dense
objects buried at the hearts of galaxies.
The first clue that
supermassive black holes exist was the discovery several decades ago of quasars — extremely bright
objects in the centres of distant galaxies.
Discovered in 1963, quasars are the most powerful
objects beyond our Milky Way galaxy, beaming vast amounts of energy across space as the
supermassive black hole in their center sucks in matter from its surroundings.
«Scientists observe
supermassive black hole in infant universe: Findings present a puzzle as to how such a huge
object could have grown so quickly.»
Bañados was looking in particular for quasars — some of the brightest
objects in the universe, that consist of a
supermassive black hole surrounded by swirling, accreting disks of matter.
The accretion disks around
supermassive black holes (black holes with masses millions of times that of the Sun) are some of the brightest
objects in the Universe.
A near - record
supermassive black hole discovered in a sparse area of the local universe indicates that these monster
objects — this one equal to 17 billion suns — may be more common than once thought, according to University of California, Berkeley, astronomers.
The hunt for a key stage in the formation of the biggest type of
supermassive black hole has begun in earnest, with the discovery of merging pairs of these
objects.
Many galaxies, including our own, have one
supermassive black hole at their core, which grows by slowly pulling in a host of smaller
objects, including stars and entire star systems.
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.
A mysterious
object that repeatedly bursts with ultra-powerful radio waves must live in an extreme environment — something like the one around a
supermassive black hole.
Quasars constitute a brief phase in the galactic life - cycle, during which they shine as the most luminous
objects in the Universe, powered by the infall of matter onto a
supermassive black hole.
Quasars are very luminous
objects powered by accretion of gas into
supermassive black holes at the centers of distant galaxies.
Further studies showed that this
object, called B3 1715 +425, is a
supermassive black hole surrounded by a galaxy much smaller and fainter than would be expected.
If such an
object does exist, it could provide vital clues to how
supermassive black holes form and evolve.
A newly discovered way to determine the spin of
supermassive black holes could help shed light on the evolution of these bizarre
objects and the galaxies they anchor.
The activities seen in the AGNs are caused by gaseous matter falling into, and interacting with, the
supermassive central
objects mentioned above, according to the current consensus of most researchers.
A NASA spacecraft has spotted strange light shifts near the heart of a
supermassive black hole that could help scientists better understand the inner workings of these monstrous
objects.
The
object is known to have a mass of around 4 million times the mass of the Sun and is considered to be the central
supermassive black hole of the Milky Way.
Supported by the National Science Foundation, IceCube is capable of capturing the fleeting signatures of high - energy neutrinos — nearly massless particles generated, presumably, by dense, violent
objects such as
supermassive black holes, galaxy clusters, and the energetic cores of star - forming galaxies.
In time, Oka said, the
object will be drawn towards Sagittarius A * and sink into it, making the
supermassive black hole at the heart of the Milky Way even more massive.
Although the data is limited only to a small number of target
objects, Figure 3 shows the ratio of HCN / HCO + and HCN / CS increases in galaxies that have a
supermassive black hole in a more active state.
Bañados was on a search for quasars, which are extremely bright
objects that have a
supermassive black hole embedded in them.
Our central,
supermassive black hole is relatively quiet when compared to its counterparts in other galaxies, flaring only occasionally with X-rays and infrared light as
objects fall into it.
Named Sagittarius A *, this incredibly compact
object was soon determined to be a
supermassive black hole.