Sentences with phrase «star by a black hole»

So far the leading candidates are the merger of two neutron stars and the swallowing of a neutron star by a black hole.

Not exact matches

For example, black holes in the universe can not be seen or felt or touched, but by the effect they have on stars, it has been deduced that they exist.

Black hole coalescences aren't expected to generate light that could be spotted by telescopes, but another prime candidate could: a smashup between two remnants of stars known as neutron stars.

The fact there must then be tens of thousands of black holes at the galactic center stems from the notion these objects would only very rarely be accompanied by a star to make them glow — most would remain isolated, invisible singletons.

Taken with the orbiting Chandra Observatory, it shows the hottest, most violent objects in the galaxy: black holes gobbling down matter, gas heated to millions of degrees by dense, whirling neutron stars, and the high - energy radiation from stars that have exploded, sending out vast amounts of material that slam into surrounding gas, creating shock waves that heat the gas tremendously, generating X-rays.

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

But almost all of that light is being produced by the galaxy's central supermassive black hole — not by its stars.

Outer space may look mostly empty, but it's actually packed with cosmic radiation — gamma rays and charged particles produced by exploding stars, black holes and other violent astrophysical phenomena.

The spiral shape is commonplace, with a massive black hole at the centre, surrounded by a bulge of old stars, and arms winding outwards where relatively young stars like the Sun are found.

Black holes usually form from a collapsed star, and then grow by gobbling up material.

Heavy black holes might also betray their presence by occasionally passing in front of more distant stars.

As early as 2021 it will be joined by the Einstein Probe, a wide - field x-ray sentinel for transient phenomena such as gamma ray bursts and the titanic collisions of neutron stars or black holes that generate gravitational waves.

Gravitational waves detectable from Earth are generated by collisions of massive objects, such as when two black holes or neutron stars merge.

«We know very well that black holes can be formed by the collapse of large stars, or as we have seen recently, the merger of two neutron stars,» said Savvas Koushiappas, an associate professor of physics at Brown University and coauthor of the study with Avi Loeb from Harvard University.

Astronomers spy one of the brightest and longest gamma - ray bursts ever seen, caused by a black hole swallowing a star.

BlackGEM is going to hunt down optical counterparts of sources of gravitational waves — tiny ripples in spacetime generated by colliding black holes and neutron stars and detected for the first time in 2015 by the Laser Interferometer Gravitational - Wave Observatory (LIGO).

But if such a star collapses into a black hole, the hole can be described by only three properties: its mass, electric charge and angular momentum.

For the last few years, he has studied a gaggle of extremely fast - moving stars, stellar runaways that were long ago flung out of the Milky Way by the massive black hole at its center.

By a careful process of elimination, the researchers eventually concluded that the star must have become a black hole.

The MIT - led team looked through data collected by two different telescopes and identified a curious pattern in the energy emitted by the flare: As the obliterated star's dust fell into the black hole, the researchers observed small fluctuations in the optical and ultraviolet (UV) bands of the electromagnetic spectrum.

In our own galaxy we have been able to electromagnetically observe black holes orbited by stars and map their behaviour — notably their rapid spinning.

By contrast to black holes, these stars can not gain in mass arbitrarily; past a certain limit there is no physical force in nature that can counter their enormous gravitational force.

In the failed supernova of a red supergiant, the envelope of the star is ejected and expands, producing a cold, red transient source surrounding the newly formed black hole, as illustrated by the expanding shell (left to right).

For the first time, scientists worldwide and at Penn State University have detected both gravitational waves and light shooting toward our planet from one massively powerful event in space — the birth of a new black hole created by the merger of two neutron stars.

Stars that pass too close to the black hole can be shredded by the intense gravity.

Using similar techniques originally inspired by string theory, Strominger's group has computed the spectrum of gravitational waves emitted when compact objects like stars fall into giant black holes — predictions that could be verified by the future Evolved Laser Interferometer Space Antenna, planned to launch in two decades (or maybe sooner).

There, young stars, born during the merger, will explode as supernovas, and a quasar — a giant black hole ignited by the galactic collision — might spew energetic radiation.

The new flick should help astronomers understand the narrow jets formed by neutron stars and black holes in our galaxy and beyond.

The resulting disk has a series of vibrational «modes,» rather like resonances in a tuning fork, that might be excited by small disturbances — think of a planet - forming stellar disk nudged by a passing star or of a black hole accretion disk in which material is falling into the center unevenly.

By studying black holes, the ultimate fate of many stars, LIGO also could help rewrite the textbook version of stellar evolution.

The second holds that the bursts are formed by a neutron star falling into a black hole.

Although sufficient to disintegrate the primordial star, almost all of the heavy elements such as iron, were consumed by a black hole that formed at the heart of the explosion,» he says.

At least one source of these bright, brief blasts of radio energy may be a young neutron star assisted by a nearby massive black hole, new research suggests.

Another giveaway is that light from stars that lie behind a black hole as seen from Earth should be deflected by its gravity.

They may be a new class of midsize black holes, weighing 100 solar masses or so, which could have formed either by the collision of smaller black holes or by the death of supermassive stars.

If the new force does exist, we might soon be able to see its effects on things influenced by dark matter, such as the behaviour of black holes or the masses of the first stars, says Douglas Finkbeiner of Harvard University, who was not involved in the new study.

And as we might expect, some unlucky stars get swallowed by black holes.

The white blob at the center contains a massive black hole surrounded by infalling material, which, oddly, is not much brighter than some of the stars around it.

For many aspects of the simulation, researchers can start their calculations at a fundamental, or ab initio, level with no need for preconceived input data, but processes that are less understood — such as star formation and the growth of supermassive black holes — need to be informed by observation and by making assumptions that can simplify the deluge of calculations.

New studies suggest lonely planets flying through intergalactic space were formed by star - destroying supermassive black holes.

That would be big enough to see gravitational waves emitted by any merging supermassive black holes that may have existed around the time when the universe's first stars began to shine, about a hundred million years after the big bang.

This quashes hopes of finding low - frequency gravitational waves emitted by pairs of dense stars, or stars captured by 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.

Until now, proof of black holes» existence had been inferred from the powerful gravitational pull on various stars by small, invisible objects.

What looked like the brightest supernova ever spotted might in fact be the death gasp of a star being swallowed by a black hole

The team also discovered a similar galaxy, MASOSA, which, together with Himiko, discovered by a Japanese team, hinted at a larger population of similar objects, perhaps made up of the earliest stars and / or black holes.

We speculate that when the black hole was being rapidly force - fed by its companion orbiting star, it reacted violently by spewing out some of the material as a fast - moving jet.

A snapshot image from a computer simulation of a star disrupted by a supermassive black hole.

A giant black hole ripped apart a nearby star and then continued to feed off its remains for close to a decade, according to research led by the University of New Hampshire.

Astronomers believe that black holes — those mysterious collapsed remnants of massive stars — are surrounded by invisible spheres called event horizons.