Discovered a very unusual supernova that exploded twice

Date:

2017-11-09 12:30:09

Views:

2209

Rating:

1Like 0Dislike

Share:

Discovered a very unusual supernova that exploded twice Source:

Usually, when a star enters a phase of a supernova, it is a blast... in fact, it is the end. However, the new discovery astronomers can force us to revise our understanding of how stars die. Scientists have discovered a star that entered a phase of a supernova, exploded, managed somehow to survive this event, and then, 60 years later, exploded again. For explorers this turn of events was highly unusual. Just because it doesn't have to be.

The Supernova, dubbed iPTF14hls, was discovered in 2014 and at first glance it seemed quite ordinary researchers of supernovae of class II-p Supernovae of this class represent the cores of massive stars that turn into neutron star and create a powerful shock wave, passing through its outer shell, rich in hydrogen, which is released into space. The ejected matter is ionized by the shock wave, and later cools and recombines.

Observed spectroscopic features of the supernova iPTF14hls seemed completely identical for the supernova class II-P. But then, a few months later, she demonstrated a behavior that normally do not exhibit other supernova – she's back, that is, ignited.

For 600-day monitoring period for her, she's lackluster, a few times, and then again became brighter. In less than three years was fixed at least 5 such cases. Usually the supernova peak maximum brightness, Shine so within a few months and then start to fade. However, when scientists from the Observatory of the Las Cumbres (USA) returned to the study the archived data, they found something surprising – the same supernova exploded in 1954.

a Graph of brightness (in billions suns) iPTF14hls supernova (marked by a yellow line) in comparison with the normal behaviour of the supernova (marked by the blue line) for 600-day period

"This supernova negates all that we know about these objects. It's the biggest mystery I have ever met for almost a decade, studies of stellar collapse", — says the head of the study, astronomer Yair Arcavi University of California, Santa Barbara and a member of the Observatory of the Las Cumbres.

The article of the journal Nature, the researchers cited estimates, according to which initially the supernova iPTF14hls was the bigger star at least 50 times more massive than our Sun and, most likely, it is much more.

"really supernova iPTF14hls may be the largest explosion of a star ever seen", — says researcher Lars, Bildsten is the Director of the Institute for theoretical physics Kavli at the University of California.

The Astronomer believes that a possible explanation for supernovae iPTF14hls could be that it is the so-called pulsating pair-instability supernova, which would make it the first of its kind facility of this type, which was able to observe actually. This event is the release of a huge amount of star stuff, which at first glance may seem a supernova, but not destroying the star.

According to scientists, this phenomenon is possible only with the stars, having mass, 95-130 times solar. During these emissions star spits out your outer layer, thereby reducing 10-25 solar masses. This can be repeated until then, until the star eventually collapses into a black hole. But this is just a guess. As an earlier candidate for the role of pulsating pair-unstable supernovae was considered the star ETA Carinae. According to scientists, it occurred 1843 ejection of matter, however, to confirm that the star belongs to this class, researchers have been unable.

"Such explosions of stars would be expected during the early Universe, but not now. It's as if we discovered today a real live dinosaur. If such found, it would probably have wondered whether this dinosaur?", — says Andy Howell, University of California, who leads the group to search for and study of supernovae.

It would Seem that the mystery is nearing solution. But all is not so simple as we would like. The fact that the hypothesis does not account for the presence of hydrogen at a pulsating pair-unstable supernovae. After an explosion in 1954 supernova iPTF14hls kept in its shell hydrogen in a few tens of solar masses. In addition, in a later supernova explosion energy was attended by several orders of magnitude higher than described in the hypothesis of a pulsating pair-instability supernova. From this we can draw two conclusions: either iPTF14hls really is a pulsating pair-unstable supernovae, but without that unusual, or is it some completely different kind of supernova that had never been seen before.

The Team of researchers continued monitoring of this supernova, and hoped that through time will still be able to find the right answer.

"It's one of those types of events on which you can literally break down. At first we thought it was a perfectly ordinary and quite undistinguished object. He then became brighter and this brightness has not changed from month to month," — says researcher Peter Nugent of the National laboratory behalf of the Lawrence Berkeley.

"after Collecting all the data of our observations from the Palomar Observatory, the Keck Observatory, Observatory, Las Cumbres, and even images obtained in the framework of Malomernogo review, 1954, we will be able to get to the bottom".

"I'd really like to find at least another similar object" — he added.

...

Recommended

The Americans on the moon: what everyone should know?

The Americans on the moon: what everyone should know?

the Upcoming cosmonautics day is my favorite holiday. It marks the triumph of the human mind: in just four thousand years Homo Sapiens went from hunter-gatherers to space explorers. 12 April 1961 Soviet cosmonaut Yuri Gagarin became the first man in ...

Why are some galaxies spiral shaped?

Why are some galaxies spiral shaped?

you Know what surprised me the most? The fact that we perceive the surrounding world as it is. Animals, plants, the laws of physics and the cosmos are perceived by many people as something so mundane and boring that they invent fairies, ghosts, monst...

Astronomers were able to see the death of another star system

Astronomers were able to see the death of another star system

In the cosmic ocean drifts a lot of mysteries about the existence of which we are unaware. One of these was uncovered five years ago, when astronomers have discovered a lonely star at a distance of 570 light years from Earth, the brightness of which ...

Comments (0)

This article has no comment, be the first!

Add comment

Related News

Experimental SpaceX rocket engine blew up in Texas

Experimental SpaceX rocket engine blew up in Texas

Merlin Rocket engine of new generation, produced by the company , exploded during tests on one of the test sites in Texas. According to the official statement of the company, at the time of this incident nobody suffered. The explo...

Jeff Bezos: to save the Earth, you need as quickly as possible to explore the space

Jeff Bezos: to save the Earth, you need as quickly as possible to explore the space

the Head and founder of Amazon and owner of the aerospace company Blue Origin, Jeff Bezos visited at the weekend summit in Los Angeles, dedicated to space exploration, where he made a speech about how the space need to conquer as ...

The story of the offspring mongrels who paved the way into space

The story of the offspring mongrels who paved the way into space

the Engineers, imprisoned Husky in a narrow windowless space capsule, the "Sputnik 2" November 3, 1957, knew that seeing her one last time. Following the success of "Sputnik-1" on 4 October, Nikita Khrushchev ordered to send into ...

Chinese reusable rocket will be ready by 2020

Chinese reusable rocket will be ready by 2020

the Chinese scientific and technical aerospace Corporation intends to develop its own reusable rocket and after two years send it into space. Developers that design their missiles to be materially different from Falcon 9 and other...

New NASA Rover will become a work of engineering art

New NASA Rover will become a work of engineering art

According to the plans of space Agency NASA, the next Mars Rover will travel to Mars in July 2020. The machine is still in production, but the NASA employees periodically publish information that shed light on how he eventually wi...

Roskosmos wants to build orbital nuclear power plant

Roskosmos wants to build orbital nuclear power plant

the Problem is fuel delivery to the orbit of the Earth is quite serious. Now to power satellites and other spacecraft, requiring a long stay in space, solar panels are used. But the specialists of Roskosmos went the other way and ...

Flight and life on Mars would be akin to a trip to hell

Flight and life on Mars would be akin to a trip to hell

the space Agency NASA and SpaceX company is not only trying to figure out how to deliver humans to Mars, they also think about how the 200-day journey and in fact life itself on the red planet can affect the human body and what to...

Aliens may be hiding in the oceans, says astronomer Alan stern

Aliens may be hiding in the oceans, says astronomer Alan stern

the Search for intelligent extraterrestrial life on other planets is a long-standing question. After decades since the beginning of this search was proposed several theories that attempt to explain the reasons for our failures in ...

Boeing began to prepare the rocket for its

Boeing began to prepare the rocket for its "space taxi"

Aerospace Boeing began Assembly of the rocket Atlas V, designed to deliver astronauts and cargo to the ISS on Board the new device CST-100 Cockpit that Atlas V will be put in orbit. Now the main vehicle delivering astronauts to t...

Saudi Arabia is investing in space tourism $ 1 billion

Saudi Arabia is investing in space tourism $ 1 billion

the Head of the American company, Richard Branson has got a very powerful and rich friend Saudi Arabia. Perhaps with the support of the state, his dream will finally be realized in the space will be able to fly not only the past y...

10 important missions in the history of NASA

10 important missions in the history of NASA

Since half a century ago created the National Aeronautics and space administration (NASA, NASA), it has launched hundreds of missions into space. Since the probes that touched the borders of our Solar system to manned capsules tha...

Spaceship graveyard: what is it and where is it located?

Spaceship graveyard: what is it and where is it located?

the Most distant from land point on Earth has many names, but most often it is called point Nemo, or oceanic pole of inaccessibility. It is located at the coordinates 48°52,6' South latitude and 123°to 23.6' West longitude. The cl...

CERN: our Universe shouldn't exist

CERN: our Universe shouldn't exist

"All our observations find a complete symmetry between matter and antimatter, why our Universe shouldn't exist", says Christian Smorra from the collaboration BASE at the research center CERN. "There has to be asymmetry, but we jus...

Vector, a rival of SpaceX, will make three flights next year

Vector, a rival of SpaceX, will make three flights next year

Aerospace company Vector has reached agreements with NASA management and received approval on three commercial launch of their rockets. All three of the launch is from the Baikonur NASA, located in Virginia — CNBC. Executiv...

India plans to launch a spacecraft to the moon in 2018

India plans to launch a spacecraft to the moon in 2018

In recent years more and more of the global aerospace agencies are beginning to plan missions to explore the moon. And many will be, not that soon. But recently Indian space research organization (ISRO) said it plans to launch the...

Former employees of SpaceX will begin to print the rocket on 3D printers

Former employees of SpaceX will begin to print the rocket on 3D printers

What will they do in order to reduce the cost of production of space rockets some sort of time ten! Here, for example, former employees of SpaceX and Bue Origin founded a start Space Relativity, the purpose of which — print ...

Five NASA photos that changed the world

Five NASA photos that changed the world

When humanity first broke the bonds of gravity and overcame the limits of our planet's atmosphere, we saw the Universe in its present splendor, which was never seen. Now we are no longer limited to our place of stay on the Ground ...

Blue Origin conducted the first firing tests of the engine BE-4

Blue Origin conducted the first firing tests of the engine BE-4

looks Like the New Glen missile, developed by the company Blue Origin, has become one step closer to its first flight, because now she really has working engines, passed the first tests. Yes, yet rejoice too early, but the work on...

The signals aliens might be too complicated for us

The signals aliens might be too complicated for us

"each of these stars can be new York, Paris, London, and we even about it do not suspect," says Nate Tellis, University of California, Berkeley, commenting on the analysis 5600 stars, conducted by the Keck Observatory in Hawaii, w...

The European southern Observatory announced

The European southern Observatory announced "an unprecedented discovery" in space

last week, the European southern Observatory (ESO) whetted the Internet news about the "unprecedented discovery". And finally, the organization revealed that for the first time in history, astronomers observed gravitational waves ...