By Will Dunham
WASHINGTON (Reuters) – Contemporary scientists have monitored huge white dwarf stars – very integrated stellar stars – revolving around each other and which seems to die in an unusually violent quadruple.
The two stars, who are linked to each other in the so -called binary system, are in the Milky Way, about 160 light -years away from the ground – relatively close to the cosmic aspect. The optical year is the light distance per year, 5.9 trillion mile (9.5 trillion km).
White dwarves are among the most compromised heavenly things. Stars that reach eight times, our sun mass appears to be destined to this way. In the end they burn all the hydrogen they use as fuel. Gravity then leads to their collapse and the bombing of their outer layers in a “giant, red” stage, leaving behind a pressing heart almost the diameter of the Earth – the white dwarf.
“The white dwarves are the stars of the vast majority of the stars, and from time to time we find systems where two of the white dwarves are closely revolving each other,” said James Mondai, a doctorate researcher at Warwick University in England and author of the study in Nature Astronomy.
The researchers used data of four ground telescopes to study this bilateral system. One of the white dwarves has a mass of about 83 % of our sun and the other is about 72 %. Monday said that there is no other white dwarf known for a largest combined mass.
“Both are large like Earth. One is about 20 % larger and the other is 50 % larger. This gives you an idea of how density. It is the sun compressed on the size of the Earth. Their fans when the regular stars may have been about three to four times the mass of the sun.”
A few hundred bilateral systems consist of two well -known white dwarf stars. These are the closests closest to each other. They are about 25 times the closest to each other than the deeper mercury planet for our solar system is on the sun, and it completes almost every 14 hours.
With the gradual narrowing of the gap between them as the bilateral system loses energy, the fact that it is very huge and guarantees its demise on a large time scale.
When they approach each other, the heavier of white dwarves will begin, due to the power of the great gravity, in extracting materials from the outer layer to lighter and increase the mass after the threshold that the white dwarf wanders from the thermal nuclear explosion.
This will put the stage on a sophisticated explosion called 1A Supernova, in this case that includes a quadruple bombing.
“The white dwarves consist of layers, like onions. Their inner layer is the essence of carbon and oxygen, surrounded by a helium layer and finally a hydrogen layer,” said Bilisoli.
“The least -storey star will move the mass to the huge mass when the reaction begins. This will lead to the helicopter (from the weight) to become very huge, which leads to an explosion.” Bilisoli added.
This quadruple bombing is expected to take about four seconds, and at the end begins. But it will not come any time soon.
The researchers calculate that it will happen about 22.6 billion years from now. The universe is about 13.8 billion years. When the explosion occurs, it appears from the Earth’s perspective brighter than the moon in the sky of the night – if there is now about 4.5 billion years, it still exists.
This is the first time that a binary system has been determined to turn to such a fate. If the Dzaman is far away enough, then the heaviest will not sit in the lighter material, then they can survive in permanent peace.
“In a wider orbit, they can actually live constantly without any catastrophic future, but here we know that the explosion will light our side of the galaxy,” Monday said.
(Will Doneham’s reports, edited by Rosalba Operation) participated
