Sentences with phrase «star merger»

Illustration showing the modeled effects of a neutron star merger that results in the formation of a black hole.

With tweaks, some of the challenged models can survive the latest test by the star merger, Zumalacárregui said, though they «lose some of their simplicity» in the process.

A hydrodynamical simulation shows a cocoon breaking out of the neutron star merger.

The August neutron star merger event presented an unexpected but very welcome opportunity, he said.

So just one neutron star merger can provide the gold we would expect to find in about six million to 10 million stars.

• «Search for High - energy Neutrinos from Binary Neutron Star Merger GW170817 with ANTARES, IceCube, and the Pierre Auger Observatory.»

• «On the progenitor of binary neutron star merger GW170817.»

In August 2017, gravitational waves from a binary neutron star merger (GW170817) were detected for the first time ever by LIGO and Virgo.

About 10 minutes into the night, at 8:33 p.m. local Chilean time, Natalie Ulloa, a master's student from the University of La Serena in Chile, became the first human to set eyes on a neutron star merger.

This is the first time that scientists have measured both the gravitational waves and electromagnetic waves from a single cosmic event, connecting a GRB with a neutron star merger and opening a brand - new way to study the universe — known as «multi-messenger astronomy.»

Within the next 24 hours, as the night sky swept west, observatories In Hawaii, Australia and South Africa would each make their own observations, piecing together a movie of the first neutron star merger ever observed.

A few hours after the initial detection by LIGO and Virgo, the source of the neutron star merger had been localized to an area roughly the size of 150 full moons, or about the size of your palm if you stick it as far away from your eyes as possible.

At one point the X-ray astronomers were puzzled, since they didn't see the X-rays they were expecting from a neutron star merger, based on theoretical predictions.

But the neutron star merger did not go gentle into that good night — it went on to shine across a wide range of wavelengths beyond the visible spectrum for weeks to come.

Over a distance of 130 million light years, the gamma rays and gravitational waves emitted by merging neutron stars arrived offset by a mere 1.7 seconds, an incredible... Read moreAsk Ethan: Why Did Light Arrive 1.7 Seconds After Gravitational Waves In The Neutron Star Merger?

It was as if the neutron star merger, sometimes referred to as a kilonova, had somehow forgotten about them.

But its announcement was delayed due to the time required to understand two other discoveries: a LIGO - Virgo three - detector observation of gravitational waves from another binary black hole merger on August 14, and the first - ever detection of a binary neutron star merger in light and gravitational waves on August 17.

The binary neutron star merger is the fifth LIGO detection, and the second one involving the Virgo detector.

But these instruments also open new windows in other fields of astronomy: For instance, on 17 August 2017, LIGO found gravitational waves from a rare neutron star merger.

«We saw a bright blue source of light in a nearby galaxy — the first time the glowing debris from a neutron star merger had ever been observed,» recalled Josh Simon, another of the Carnegie team's leaders on this discovery.

Mészáros notes that the gravitational waves looked like they came from objects smaller in mass than black holes, which pointed to neutron stars, and that the electromagnetic emissions separately correlated to the event provide two ways to show proof - positive that this is a neutron star merger.

This is the first time we have ever had any observations of a neutron star merger, so all the theories are still preliminary and many more will emerge in coming weeks, Berger says.

Although nobody has yet detected gravitational waves, detectors now being built in the US and Italy («Gravity's secret signals», New Scientist, 26 November 1994), which will become operational early next decade, should be sensitive enough to detect the gravitational waves released during the last few minutes of a binary neutron star merger.

Recent speculation about the latest gravitational wave experiments suggested they may have seen a neutron star merger, but it's another black hole smashup

This composite image also includes the inspiral phase of the neutron star merger (upper left) generated by a computer simulation.

Implications of the neutron star merger GW170817 for cosmological scalar - tensor theories.

On 17 August 2017, the Laser Interferometer Gravitational - Wave Observatory (LIGO) and the Virgo interferometer detected gravitational waves (GWs) emanating from a binary neutron star merger, GW170817.

Radio observations constrain the energy and geometry of relativistic material ejected from a binary neutron star merger.

Spectra of a neutron star merger are unlike other astronomical transients and demonstrate rapid evolution of the source.

Photometric observations of a neutron star merger show that it produced heavy elements through r - process nucleosynthesis.

If several gravitational - wave detectors across the world detect signals from the same neutron - star merger, together they will be able to provide an estimate of the absolute loudness of the signal, which will reveal how far away the merger occurred.

«Astrophysicists say the neutron - star merger only whets their appetite for more data — they want to see more such mergers,» said Cho.

Messick anticipates that his involvement in the neutron - star merger discovery puts him in a strong position to pursue a career in multi-messenger astrophysics, but he is also aware of his luck.

He was also working on other LIGO papers at the time, including one about an earlier detection of a black - hole merger which now needed to be published before it could be eclipsed by the neutron - star merger announcement.

«We don't have any data in hand to suggest we've actually seen a neutron star merger.»

But Kilpatrick doubted that the small telescopes he relied on for observing supernovae, which tend to be very bright, would be sensitive enough to really play a role in detecting the weaker signals that would likely emerge from a neutron - star merger.

Combining gravitational waves with light from a neutron star merger is a long - held dream of astrophysicists.

Now, 5 years and several gravitational wave observations later, a neutron - star merger that Messick helped spot by analyzing gravitational wave signals is Science's 2017 Breakthrough of the Year.

B. J. Shappee et al., «Early spectra of the gravitational wave source GW170817: Evolution of a neutron star merger,» Science (16 October 2017)

M. R. Drout et al., «Light curves of the neutron star merger GW170817 / SSS17a: Implications for r - process nucleosynthesis,» Science (16 October 2017)

The neutron star merger presents some puzzles of its own.

C. D. Kilpatrick et al., «Electromagnetic evidence that SSS17a is the result of a binary neutron star merger,» Science (16 October 2017)

We saw gravitational waves and light at the same moment from a neutron star merger, which means Einstein was right and some alternative theories are dead

A mildly relativistic wide - angle outflow in the neutron - star merger event GW170817.

3 - D VISION Light and gravitational waves from a recent neutron star merger (illustrated) suggested that there are only three large dimensions of spacetime into which gravity can penetrate.

For example, nuclear properties played a vital role in the neutron - star merger event that was recently discovered by gravitational - wave and electromagnetic observatories around the world.

«The gradual brightening of the radio signal indicates we are seeing a wide - angle outflow of material, traveling at speeds comparable to the speed of light, from the neutron star merger,» said Kunal Mooley, now a National Radio Astronomy Observatory (NRAO) Jansky Postdoctoral Fellow hosted by Caltech.

«It's therefore quite remarkable that the observation of a single binary neutron star merger that occurred millions of light years away combined with the universal relations discovered through our theoretical work have allowed us to solve a riddle that has seen so much speculation in the past.»

«Radio observations point to likely explanation for neutron - star merger phenomena: Data distinguish between different theoretical models.»

The upper and lower series of pictures each show a simulation of a neutron star merger.