Sentences with phrase «massive stars formed»

When the first generation of massive stars formed and lit up, the so - called «Cosmic Dark Age» ended.

Massive stars formed in atomic hydrogen reservoirs Michał J. Michałowski 2018 April 20, 15:00 IA / U.

In this process, massive stars formed early in the life of a galaxy shine so brightly that the pressure of their radiation pushes lots of gas and dust out of the galaxy altogether.

In their simulations, Gao and Theuns found that within clumps of cold dark matter, single massive stars formed, but warm dark matter formed filaments about a quarter the width of the Milky Way, attracting enough ordinary matter to create some 10 million stars — and some of these very first stars could still be around.

«That would mean that this is a really rare system at an early stage of formation,» said Binder, «and we could learn a lot about how massive stars form and die by continuing to study this unique pairing.»

Overall, supernovas are rare, but as the solar system circles through the Milky Way, it sometimes passes through one of our galaxy's spiral arms, where large numbers of massive stars form and explode as supernovas.

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.

Even though no massive stars form in such clusters, the stars there all produce protostellar jets from their accompanying disks, and these, too, can play a dramatic role in shaping a cluster's fate.

On the other hand, we know little about how massive stars form.

Not exact matches

Lead author Fabian Schneider, a Hintze Research Fellow in the University of Oxford's Department of Physics, said: «We were astonished when we realised that 30 Doradus has formed many more massive stars than expected.»

When a massive star explodes, the spray of stardust collides with interstellar gas, forming an outgoing shock wave.

«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).

«The most massive, hottest stars can form, grow, swell, explode and leave a neutron star emitting X-rays in about 5 million years.»

Mysteriously, most of these black holes are inconveniently sized, appearing too large to have readily formed directly from dying massive stars.

Other stars are forming around the rim of the bubble, and one of them is already massive enough that its fate is sealed: one day, million of years from now, it will explode.

Most black holes are thought to form when very massive stars — those with more than about 10 times the mass of sun — exhaust their nuclear fuel and begin to cool and therefore contract.

[3] A neutron star forms when the core of a massive star (above eight times the mass of the Sun) collapses.

This image shows the most common type of gamma - ray burst, thought to occur when a massive star collapses, forms a black hole, and blasts particle jets outward at nearly the speed of light.

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.

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.

Weighty black holes are difficult to explain, because the stars that collapsed to form them must have been even more massive.

Astronomers had long debated whether globular clusters were massive enough for black holes to form, either when the clusters condensed in the early universe or when gas and stars accumulated at their cores.

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.

Form a black hole in the usual way, through the collapse of a massive star.

Most astrophysicists think that gamma ray bursts, fantastically energetic flares from deep space, stream from new black holes that form when the cores of massive spinning stars collapse to trigger supernovas.

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 simulation also showed that the stars that formed were very massive.

A research group led by Aya Higuchi, a researcher at Ibaraki University, conducted observations of the massive - star forming region IRAS 16547 - 4247 with the Atacama Large Millimeter / submillimeter Array (ALMA).

The Orion Nebula is the nearest region of massive star formation to Earth, and is therefore studied in great detail by astronomers seeking to better understand how stars form and evolve in their first few million years.

This makes it a perfect laboratory to study how many planets form in such a crowded environment, and whether they form mostly around more massive or less 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.

A distant, ancient galaxy far more massive than our own formed all its stars in less than half a billion years

Carbon, oxygen, iron, and the like had to wait for stars — especially the massive ones — to form and create heavier elements via nuclear fusion.

In the crowded central regions of the galaxy, home to large numbers of massive stars, supernovas are so common that the evolution of complex life - forms might be difficult if not impossible.

A neutron star forms when a massive star explodes as a supernova, blowing off its outer layers while its core collapses.

When a massive star collapses under its own gravity during a supernova explosion it forms either a neutron star or black hole.

But this presents its own problem, since stars this massive are expected to collapse to form black holes after their deaths, not neutron stars.

«It's amazing that a galaxy so massive existed only 200 million to 300 million years after the very first stars started to form.

Intermediate - mass black holes are thought to form either from the merging of several smaller, stellar - mass black holes, or as a result of a collision between massive stars in dense clusters.

They suggested that the magnetar formed through the interactions of two very massive stars orbiting one another in a binary system so compact that it would fit within the orbit of the Earth around the Sun.

One leading scenario for forming tightly orbiting black holes starts with a pair of massive stars already orbiting each other.

LSBs are essentially enormous disks of hydrogen gas that are massive enough to outweigh normal galaxies but too diffuse to form stars in large numbers.

According to the big bang theory, the first stars — formed from a primordial gas of hydrogen and helium — were hot, massive, and short - lived.

The gravitational interactions created in the outer disk by this massive star apparently acted as a catalyst for the gathering of debris to form other smaller, more distant moons.

Yet that's exactly what recently turned up, providing researchers a rare peek inside the core of a massive star and raising questions about how such an oddball could have formed.

Numerical simulations of collapsing clouds of primordial gas indicate that the first luminous objects to form in the universe were isolated massive stars.

It forms a close binary with another massive star within the open cluster, meaning that the two orbit around a shared centre of mass.

Once known as a frozen star, a black hole is formed when a massive star burns out and collapses upon itself, ultimately producing gravitational energy so powerful that not even light can escape from it.

Another way Wolf - Rayet stars are said to form is when a massive star ejects its own hydrogen envelope in a strong stellar wind streaming with charged particles.

The Hiroshima group combined these two tracers: galaxies and their weak lensing signal to map the changing role of massive star - forming galaxies as the universe evolves.