Sentences with word «superluminous»

Previous observations of superluminous supernovae found they typically reside in low - mass or dwarf galaxies, which tend to be less enriched in metals than more massive galaxies.

The supernova known as DES15E2mlf is unusual even among the small number of superluminous supernovae astronomers have detected so far.

While the brightness of SN 2017egm and the properties of the magnetar that powers it overlap with those of other superluminous supernovas, the amount of mass ejected by SN 2017egm may be lower than the average event.

Before this, researchers had found superluminous supernovas in dwarf galaxies, which have low metal content, according to the statement.

One of the newly discovered supernovae, named SNLS - 06D4eu, is the most distant and possibly the most luminous member of an emerging class of explosions called superluminous supernovae.

As he peered into a huge, superluminous galaxy, he wondered: What if an alien astronomer there were staring right back?

In fact, SN 2017egm was not only superluminous, but superclose: At just 420 million light - years away, it was three times closer than any other observed supernova of its type.

A rare, superluminous kind of stellar explosion does not fit into the usual supernova categories

Such superluminous supernovae are rare, occurring perhaps once for every 10,000 normal supernovae.

The death of a massive star in a distant galaxy 10 billion years ago created a rare superluminous supernova that astronomers say is one of the most distant ever discovered.

The dwarf galaxies that usually host superluminous supernovas are known to have a low metal content, which was thought to be an essential ingredient for making these explosions.

Dong realized that the galaxy was very surprising, as virtually all known superluminous supernovas have been found in dwarf galaxies that are much smaller than spiral galaxies like the Milky Way.

This difference may indicate that the massive star that led to SN 2017egm lost more mass than most superluminous supernova progenitors before exploding.

Another idea floating around is that FRBs are emitted by active galactic nuclei, or AGNs — superluminous regions at the centers of some galaxies.

SN 2017egm shares magnetar properties with other superluminous supernovas, but the researchers noted that the newly discovered supernova does have some differences.

Extremely bright exploding stars, called superluminous supernovae, and long gamma ray bursts also occur in this type of galaxy, he noted, and both are hypothesized to be associated with massive, highly magnetic and rapidly rotating neutron stars called magnetars.

These new discoveries belong to a special subclass of superluminous supernovae that have no hydrogen.

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.

«This should break all records for how long a superluminous supernova can be followed,» Raffaella Margutti, study co-author and an astronomer at Northwestern University, said in the statement.

Thousands of supernovas have happened in the past decade, but only about 50 of them were «superluminous,» meaning they were 100 times brighter than usual supernovas.

This work marks the first time astronomers have identified a superluminous supernova that exploded in a large spiral galaxy, and in a metal - rich area.

«Superluminous supernovas were already the rock stars of the supernova world,» Matt Nicholl, lead author of the study and an astronomer at the Harvard - Smithsonian Center for Astrophysics in Cambridge, Massachusetts, said in the statement.

«It could be created by a superluminous supernova or a long gamma ray burst, and then later on, as it evolves and its rotation slows down a bit, it produces these fast radio bursts as well as continuous radio emission powered by that spindown.

While a handful of these superluminous supernovae have been seen since they were first announced in 2009, and the creation of a magnetar had been postulated as a possible energy source, the work of Howell and his colleagues is the first to match detailed observations to models of what such an explosion might look like.

Superluminous supernovae are so hot that the peak of their light output is in the UV part of the spectrum.

«What we really want to know is the relative rate of superluminous supernovae to normal supernovae, but we can't yet make that comparison because normal supernovae are too faint to see at that distance.

«Superluminous supernova marks the death of a star at cosmic high noon: At a distance of 10 billion light years, a supernova detected by the Dark Energy Survey team is one of the most distant ever discovered and confirmed.»

«The current idea is that a low - metal environment is important in creating superluminous supernovae, and that's why they tend to occur in low mass galaxies, but DES15E2mlf is in a relatively massive galaxy compared to the typical host galaxy for superluminous supernovae,» said Pan, a postdoctoral researcher at UC Santa Cruz and first author of the paper.

Superluminous supernovae are 10 to 100 times brighter than a typical supernova resulting from the collapse of a massive star.

The yellow arrow marks the superluminous supernova DES15E2mlf in this false - color image of the surrounding field.

The Dark Energy Survey has discovered a number of superluminous supernovae and continues to see more distant cosmic explosions revealing how stars exploded during the strongest period of star formation.

«We know metallicity affects the life of a star and how it dies, so finding this superluminous supernova in a higher - mass galaxy goes counter to current thinking,» Foley said.

This is the first clear evidence for a metal - rich birthplace for a superluminous supernova.

These results show that the amount of metals has at most only a small effect on the properties of a superluminous supernova and the engine driving it.

Following the recent discovery of one of these «superluminous supernovas,» a team of astronomers led by Matt Nicholl from the Harvard - Smithsonian Center for Astrophysics (CfA) in Cambridge, Mass., has uncovered vital clues about where some of these extraordinary objects come from.

A team led by Subo Dong of the Kavli Institute for Astronomy and Astrophysics used the Nordic Optical Telescope to identify it as a superluminous supernova.

«Superluminous supernovas were already the rock stars of the supernova world,» said Nicholl.

«This should break all records for how long a superluminous supernova can be followed,» said co-author Raffaella Margutti of Northwestern University in Evanston, Illinois.

In the new study, Done and her team estimated that the black hole found 500 million light - years away — which is powering a superluminous «active galactic nucleus» known as PG1244 +026 — has a relatively low spin rate.

And, according to Laura Spitler, namesake of the Spitler burst and a researcher at the Max Planck Institute for Radio Astronomy, in Bonn, Germany, magnetars generally form from stellar explosions called Type - I superluminous supernovas.

Rotating magnetars that hammer surrounding material with their vast magnetic fields, superluminous supernovae explosions, or immensely volatile cosmic events like supermassive black holes ejecting material are among the theories of what causes FRBs.

When the All Sky Automated Survey for SuperNovae (ASAS - SN) detected a massive explosion in 2015, astronomers pored over the data and categorized the event as a superluminous supernova, the brightest - ever recorded in history, which was twice as bright as the second in the list.

A study detailing the new findings was published Monday in the journal Nature Astronomy under the title «The superluminous transient ASASSN - 15lh as a tidal disruption event from a Kerr black hole.»

«There are also two other classes of extreme events — long duration gamma - ray bursts and superluminous supernovae — that frequently occur in dwarf galaxies, as well.