Sentences with phrase «which massive stars»

Until very recently, the resolution and sensitivity of observational instruments were not high enough for detailed investigations of molecular clouds in which massive stars are forming.

In fact, cosmological natural selection specifically favors universes — like ours — in which massive stars can form and give rise to new black holes.

The rate at which massive stars form drops sharply as you venture outward from the Milky Way's center, and the abundance of heavy elements falls with them.

Neutron stars are the remnants of supernovae, in which a massive star is crushed into a sphere just kilometres across.

Not exact matches

«NGC 1277's black hole could be many times more massive than its largest known compete tor, which is estimated but not confirmed to be between 6 billion and 37 billion solar masses in size.It makes up about 59 percent of its host galaxy's central mass — the bulge of stars at the core.

The American league is in full swing, for one thing, and our very under strength squad of not match ready players managed to beat the best of them, something that the Ox told Arsenal Media that he thinks was a big shock to the All - Stars side which included massive talents like Andrea Pirlo, David Villa and our long time nemesis Didier Drogba.

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Arsenal have registered a massive 45 players from the First team, the reserves and the Academy, for our six Europa League games against BATE, Koln & Red Star Belgrade, which would seem to indicate that he is going to give a lot of our youngsters a run - out in the competition while our senior players attempt to get back into contention for the Premier League.

United were missing some star players with Jaap Stam, Andy Cole and Ole Gunnar Solskjaer, which would turn into a massive loss for United, who needed to find their feet again after the devastating defeat to their North West rivals.

The team's research leaves many open questions, which they intend to investigate in the future: how universal are the findings, and have other starburst regions produced a similar overabundance of massive stars?

«The gas which forms the major part of the insterstellar medium,» explains Jorge García Rojas, a researcher at the IAC who is the first author on the paper «can be observed because its atoms are ionized by the photons emitted by the hot stars embedded inside it (which can either very massive stars, or white dwarfs, which are also very hot).

Population III stars were probably more massive than stars born in the later universe, which means they could have left behind black holes as hefty as several hundred solar masses.

In his framework, the three dimensions of space and time are woven together to create a four - dimensional fabric, which acts as the source of gravity because it bends and warps around massive objects, like stars.

«During the past few years our group,» says David Jones, an astrophysicist at the IAC and another of the authors on the paper, «has discovered that the planetary nebulae with the biggest discrepancies in their abundances are usually associated with binary central stars which have been through a phase with a common envelope, that is to say the process of expansion of the more massive of the two stars has meant that the other star is orbiting within its outer atmosphere, and the viscosity has brought the stars very close to one another.

Scientists have looked for the gravitational effects of unidentified, star - sized objects, which could be made either of normal matter or dark matter, known as massive compact halo objects, or MACHOs.

The star, which was 25 times as massive as our sun, should have exploded in a very bright supernova.

The energy spectrum and periodic fluctuations of the X-rays, recorded by the INTEGRAL satellite, suggest they are coming from young binary star systems in which a neutron star is stealing matter from its massive companion.

It doesn't necessarily make sense, said Stanek, professor of astronomy at Ohio State, that a massive star could undergo a supernova — a process which entails blowing off much of its outer layers — and still have enough mass left over to form a massive black hole on the scale of those that LIGO detected.

In an ironic twist, one of the first consequences of the formation of a massive star is that it starts to destroy the cloud from which it was born.

It is possible that the radiation and stellar winds from massive stars actually help create denser spots within the pillars, which can then form stars.

Long gamma - ray bursts, which flash for up to 100 seconds or longer, are believed to occur when massive stars explode as supernovae.

Other astronomers are examining the smallest known brown dwarfs — which are around 10 times as massive as Jupiter — to determine the minimum mass needed for gravity to pull a pocket of gas and dust together to form a star.

All the previous gravitational - wave detections since the first in September 2015 had been the result of two merging black holes — objects much more massive than a neutron star — which have left only gravitational waves as fleeting clues of their merger.

Instead of using visible light, Dame and others map the Milky Way by looking for radio emissions from molecular gas clouds and massive, young stars, both of which typically reside in spiral arms.

The team will also make modifications to the telescope's instrumentation, which will allow scientists to look even further back in time, to before there were enough stars to form galaxies, when the very first population of very massive objects began to blossom.

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.

When a massive star dies, it explodes as a supernova, which includes a short burst of visible light, as in this illustration.

The planet, which is about 1.6 times as massive as Earth, is too close to its star to be considered habitable.

Most astronomers believe that a quasar is a massive black hole at the centre of a galaxy, greedily sucking in stars and gas, which become so hot that they give off tremendous amounts of energy.

The situation, says former LHCb spokesperson and University of Oxford physicist Guy Wilkinson, is roughly analogous to a planetary system in which the light quark is akin to a planet orbiting a binary pair of massive stars.

Three of these planets are confirmed to be super-Earths — planets more massive than Earth, but less massive than planets like Uranus or Neptune — that are within their star's habitable zone, a thin shell around a star in which water may be present in liquid form if conditions are right.

The galaxies — which would appear as flat, rotating disks — are brimming with extremely bright and massive blue stars.

In the first stage of this process, the more massive star of the pair begins to run out of fuel, transferring its outer layers to its less massive companion — which is destined to become the magnetar — causing it to rotate more and more quickly.

appear to be surrounded by massive haloes of dark, unidentified material which betrays its presence only by its gravitational pull on stars and other galaxies.

Bersten and her colleagues analyzed the light from the supernova and found that it matches models of the first phase of a supernova called the shock breakout phase, in which a shock wave from a massive star's collapse ricochets back from the star's core and pushes stellar material outward.

The team used the Faint Object Camera and Spectrograph (FOCAS) mounted on the Subaru Telescope to thoroughly study the visible wavelength spectrum (Note 1) of the afterglow of a gamma - ray burst (GRB, Note 2), which is a violent explosion of a massive star.

That means the progenitor of the neutron star must have been more massive than the heaviest stars still around in the cluster, which weigh up to 35 solar masses, says astronomer Michael Muno of the University of California, Los Angeles, whose team first identified the object in Chandra observations taken in May and June this year.

Observations suggest «long» bursts, which can last from seconds to a few minutes, are born when massive stars explode and their cores collapse into black holes.

At the American Astronomical Society meeting here, they presented the first three - dimensional computer simulations of these titanic fireworks, which mark the demise of massive stars.

Chandra doubled the number of massive stars that are known in the nebula, which is only a few million years old.

Thus it addresses a spectrum not covered by experiments such as the Laser Interferometer Gravitational - Wave Observatory, which searches for lower - frequency waves to detect massive cosmic events such as colliding black holes and merging neutron stars.

The intense radiation was part of a gamma - ray burst that lasted a minute and which marked the death of a massive star transmogrifying itself into a black hole.

Based on data taken by NASA's Chandra X-ray Observatory, the model takes into account how energy flows between two regions around the black hole — an inner core close to the boundary beyond which light can not escape (the event horizon) and an outer ring that extends far out and includes the massive young stars lurking near the black hole.

First, if a star grows massive enough, its nuclear fires can no longer overcome the crushing force of its gravity, in which case it runs out of fuel and collapses.

While the new analysis finds that two of the spiral arms contain far more stars than the other two structures, the overall rates at which young, massive stars are forming are approximately the same in all four of the newly recognized spiral arms.

In this case, a hypothetical particle called a graviton — which mediates gravity — appears in large numbers out of the vacuum of space in regions crowded with massive objects such as stars.

Natal kicks are thought to occur during the formation of neutron stars, which are created from the death of less massive stars than the progenitors of LIGO's sources.

The darkened corpse of a former sun from which not even light can escape, a black hole forms when a massive, dying star crumples under its own gravity.

These bursts, which have been detected in large numbers by NASA's Swift telescope, are fleeting explosions thought to be caused when massive stars die or when neutron stars merge.

Ray Jayawardhana: It is a clue that most likely, these high energy neutrinos come either from jets of particles that are accelerated by super massive black holes at the hearts of galaxies, or from really gigantic stars that explode at the end of their lives that also produce a phenomenon we call gamma ray bursts, which also might accelerate particles to very high speeds and energies.