Sentences with word «supernova»

More common lower - energy cosmic rays — thought to emerge in the aftermath of supernova explosions in the Milky Way — curve so much in the galaxy's magnetic field that they appear to come from all over the sky.

The key agents in this are cosmic rays, which are energetic particles coming from the interstellar media — they come from remnants of supernova explosions mainly.

CE: If the first stars to evolve were somehow extremely large, they would have exploded as supernovas in only a few tens of millions of years.

Thus, astronomers can study the radiation from supernova remnants, active galaxies, and other objects.

Before the 300 - foot telescope, we didn't know that pulsars come from supernova explosions.

Penn State University astronomers have discovered that the mysterious «cosmic whistles» known as fast radio bursts can pack a serious punch, in some cases releasing a billion times more energy in gamma - rays than they do in radio waves and rivaling the stellar cataclysms known as supernovae in their explosive power.

Riess led an effort to discover the needed sample of very distant type Ia supernovae by piggybacking on the Great Observatories Origins Deep Survey.

The bigger a star is, the hotter it burns and the faster it runs through its fuel; Figer says the Pistol is only a couple of million years old but is already within a few million years of going supernova — that is, of blowing up.

Radio waves are produced by supernova remnants and by electrons passing through the magnetic fields of distant radio galaxies.

In our case, we were looking for supernova explosions to use as distance markers.

So Fabio Governato, an astronomer at the University of Washington, and his colleagues simulated dwarf galaxy formation on supercomputers, this time with supernova explosions in the mix.

Observations of remnants of supernova 1987A by camera and spectrograph have furnished new clues to the life of a star whose catastrophic explosion astronomers witnessed four years ago.

As a check of this map, Steve Rodney of Johns Hopkins University plans to search for exploding stars called supernovae in the Frontier Fields.

«CAT scan of nearby supernova remnant reveals frothy interior.»

There were several observations that suggested the accelerated cosmic expansion, including distant supernovae for which the 2011 Nobel Prize in Physics was awarded.

The results, presented April 15 at a conference in Geneva, may force scientists to rethink theories that focus on supernovas as the producers of these speedy particles.

[3] Type Ia Supernovae occur when an accreting white dwarf in a binary star system slowly gains mass from its companion until it reaches a limit that triggers the nuclear fusion of carbon.

In contrast, core collapse supernovae develop from stars initially much more massive and larger than the Sun.

SN 2017egm is located in a spiral galaxy about 420 million light years from Earth, making it about three times closer than any other superluminous supernova previously seen.

These studies could research events like supernovae in incredible detail.

These neighbouring bubbles eventually merged to form a superbubble, and the short life spans of the stars at its heart meant that they exploded as supernovae at similar times, expanding the superbubble even further, to the point that it merged with other superbubbles, which is when the supershell was formed.

But to get the full picture, scientists must observe supernovae from a variety of perspectives, especially in the first moments of the explosion.

SHINE BRIGHT Supernova 1987A shone as a brilliant point of light near the Tarantula Nebula (pink cloud) in the Large Magellanic Cloud, as pictured from an observatory in Chile.

The outburst was visible to the naked eye, and is the brightest known supernova in almost 400 years.

The detection of dust in the early Universe provides new information on when the first supernovae exploded and hence the time when the first hot stars bathed the Universe in light.

First there'd been the anxiety - ridden, attitude - infused Jewish American novelists; followed by the less interesting, more self - regarding WASPs, the Updikes and Styrons and Foxxes; and the nondescript newbies, the young Turks full of sass and plausibility that Cora and her counterparts whipped up into supernovas for the four days of the fair, sometimes for book after book, year after year.

Unlike most supernovae surveys, which look for bright bursts of light, Kochanek would monitor about 30 nearby galaxies for curious patches of darkness where a star had suddenly disappeared.

These newly discovered supernovae are especially puzzling because the mechanism that powers most of them — the collapse of a giant star to a black hole or normal neutron star — can not explain their extreme luminosity.

The researchers — led by postdoctoral researcher Nan Liu, along with Larry Nittler, Conel Alexander, and Jianhua Wang of Carnegie's Department of Terrestrial Magnetism — came to their conclusion not by studying supernovae with telescopes.

Inferences about supernova physics from gravitational - wave measurements: GW151226 spin misalignment as an indicator of strong black - hole natal kicks.

This family - friendly hotel is within close proximity of Supernova Shopping Center and Kuta Theater.

Based on these new data, they concluded that, like many other supernovae impostors, SN 2010da likely has a companion.

Writing in Nature, the group says the discovery offers the first direct evidence for astrophysical models of supernova shock waves that date to the 1970s.

The team's simulations show, perhaps not surprisingly, that potentially habitable planets are more likely to remain so if they form in areas far from dense conglomerations of stars, where more supernova explosions occur.

Some MACHOs may be neutron stars left behind after supernovae explosions, but most are thought to be tiny failed stars called brown dwarfs which have a mass of less than 8 per cent that of the Sun and are too small to sustain nuclear fusion reactions.

The Carnegie team focused on a rare isotope of titanium, titanium - 49, because this isotope is the product of radioactive decay of vanadium - 49 which is produced during supernova explosions and transmutes into titanium - 49 with a half - life of 330 days.

Most of the time observers do not see supernovas simply because no one is looking in the right direction, and cosmologists today «have just a few thousand of them on which their calculations can be based,» Ivezic says.

Different kinds of supernovae produce different results.

How did you get involved with supernova searching?

«But supernova cosmology now allows us to do this with gravity.»

Among the galaxies they've been watching is NGC 6946, a galaxy 22 million light - years away that is nicknamed the «Fireworks Galaxy» because supernovae frequently happen there — indeed, SN 2017eaw, discovered on May 14th, is shining near maximum brightness now.

If a type Ia supernova came from one white dwarf stealing material, astronomers expect the explosion would have sent the debris out at roughly the same speeds in all directions.

For about two weeks the star could be seen in daylight, but at the end of November it began to fade and change color, from bright white over yellow and orange to faint reddish light, finally fading away from visibility in March, 1574, having been visible to the naked eye for almost 16 months (more about Brahe's «acid tongue and silver nose,» the cultural shock of the «new star,» and how supernovae create high - energy radiation from Wallace H. Tucker).

At $ 229, the Pandigital SuperNova improves on some of the problem points of the Nova.

She is also planning a follow - up study of other recent supernova impostors with the help of an undergraduate research assistant at UW Bothell.

Most of the catastrophic stellar explosions known as supernovae appear in distant galaxies, so they are difficult to study.

Rather than stretching on for several months as most supernovas do, the flashes can disappear in as little as a week.

Based on the star's period and the rate at which its spin is slowing down, astronomers estimate that it is roughly 10,000 years old — the same age as an expanding shell of supernova debris called CTA 1.

Professor Heger and a new Monash Future Fellow, Dr Bernhard Mueller, also study such supernovae using computational facilities at the Minnesota Supercomputing Institute.