Saturday , July 31 2021

Nebula Pinwheel Stunning is a Cosmic Cataclysm in the Make



Apep, the first Wolf-Rayet star system found in the Milky Way.
Image: ESO / Callingham et al.

This image of a dusty eye, gas looks pretty, but appearances can be cheated. He is known as the Wolf-Rayet star system, ready to reveal a catastrophic radiation explosion when he finally becomes supernova. What's really about this specific Wolf-Rayet system, however, is that this is the first to find out in our own galaxy. Beat the ominous music …

This Wolf-Rayet star system is formally identified as 2XMM J160050.7-514245, but for researchers who recently researched this enigmatic object, only "Apep" It is an exotic object named for the ancient Egyptian god. In a press release, Joseph Callingham, leading author of the new study and serpentist at the Netherlands Institute for Radio Astronomy (ASTRON), said "this is the first and first system of the" w found in our own galaxy "-a system that had never expected to find" in our own backyard. " Details of this research were published today in the Nature of Astronomy.

Indeed, astronomers have noticed the Wolf-Rayet stars of the front, but only in other galaxies. These massive star systems are about to go into the death of their death, and at the time they will be producing a supernova type that emits a highly powerful plasma jet and narrow-tasted-the gamma-cracked explosion horrible.

Apep is one such gamma-gamma producer system, which includes a huge triple star system in its core – a binary pair and stunning and huge sparkling arms that contain gas and dust. The system is located around 8,000 light years of Earth, which is uncomfortably close given its explosive potential.

"This was a very fun project to do in some ways, in that Joe had found this object and showed me first in 2012 when we were applying as undergraduates in Sydney – and it took us six years to collect all the data to reveal this stunning story, "said Benjamin Pope, a NASA Sagan company at the University of New York's Chronological and Cosmology and Chronology Center, and co-author of the new study, at Gizmodo. "Sometimes science is slow! But I'll remember when last year, the day before my PhD defense in Oxford, he visited me and showed me the picture of the spiral Apep-I had & # 39: to literally handsome, it was so stunning. There's nothing quite like this. "

Using the VISIR infrared mid camera on the Great Ocean Telescope of the South Wales Europe Observatory, the Pope, Callingham, and their colleagues, they measured the speed of dust within the sparkling arms. At this final stage of their short lifecycle (these systems only face a few hundred thousand years – blink the eye in cosmological terms), there are stars within the Wolf-Rayet systems turns rapidly, producing star winds that move at horrible speeds. These winds have a significant portion of space material, and they are responsible for the formation of a massive crest of dust particles. In the case of Apep, its spiral arms measure a number of light years across.

When measuring the rotation speed in this instant, researchers came to the conclusion that at least one of the three stars within the system spins fast enough so it will trigger a radiation- Gamma is long when it finally explodes like supernova (exactly timing is still impossible to predict). Gas speeds within the nebula clogged 12 million kilometer per hour, but dust only moves 570 million kilometers per hour. The researchers say that this inconsistency is a sign of a star that revolves very closely.

"The Apep's dust pinch moves much slower than the wind in the system," said Callingham. "One way this can happen is that if one of the giant stars rotates so fast that it's almost wearing it apart. Such a rotation means that when it runs out of fuel and start exploding like supernova, it will fall into the poles before the equator, producing a radiation-gamma cut. "

The significance of this perception, the Pope, said that no-one had noticed Wolf-Rayet's systems rapidly rotating in our galaxy. In addition, a number of starlers assumed that these objects could not even exist in galaxy like us; Milky Way is old and rich in metal, which contains a lot of heavy stars that should turn down quickly. The new result suggests our understanding of how massive stars die are still incomplete.

Wolf-Rayet star systems are believed to be the ones that precede long gamma rays, so if there's one in our galaxy, there's an exciting discovery, "said Pope at Gizmodo." Even if something amazing does not happen to this star system and this is the best explanation we have. "

Impression of an artist of gama-gam explosion.
Image: NASA / Dana Berry / Digital Skyworks

As noted, radiation bursts are among the most powerful explosions known to astronomers. Permanently between two seconds and a few hours long-term radial bursts release as much energy as the Sun does over its entire life. Unfortunately, some scientists feel that the Ordovician-Silurian eradication incident mass massage occurred on Earth about 440 million years ago-was caused by a gamma explosion in our own galaxy. The physicist, Adrian Melott, from the University of Kansas predicts that "a dangerous dangerous GRB should take place on average two or more times every billion years."

The Pope said he would be "pretty bad" if one was going away nearby, but he was not very worried.

"In terms of why we have nothing to worry, the best I can offer is that it is very uncertain whether Apep will go away as an explosion of gamma-gam at all, and if it's a? In fact, it is unlikely that it will be a very close future. "

As another point of encouragement, rotation of rays is very directive, expecting their high, concentrated energy rays in a specific direction. So, for Apep to be a threat, not only would supernova have to go, it would also have to be referred to in our general address.

However, there is nothing we can do for it except for finding out more about Wolf-Rayet systems. It could also be useful to speak the ancient Egyptian magic to abolish the destructive powers of the world of Apep:

Spitting on Apep, Define Apep with left footer, Going to Apep, FApep Etching, Taking Apep Cutting, Fitting Apep …

[Nature Astronomy]

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