By Will Dunham
WASHINGTON (Reuters) -A star explosion, called Supernova, is a very violent event. A star usually includes more than eight times the mass of our sun that exhausts nuclear fuel and is subject to a basic breakdown, which leads to a single strong explosion.
But a rare type of Supernova involves a different type of stars – the star Eber called a white dwarf – a double bombing. The researchers obtained photographic evidence of this type of supernova for the first time, using a very large telescope in Chile.
The consecutive explosions were embedded a white dwarf that had almost equal to the sun and was located about 160,000 lights from the Earth towards the Dorado constellation in a galaxy near the brown road called the large majestic cloud. The optical year is the light distance per year, 5.9 trillion mile (9.5 trillion km).
The image shows the scene of the explosion about 300 years after it occurs, with a concentrated attestive straw moving from the calcium element outside.
This type of explosion, which is called a type of type Ia Supernova, included the interaction between a white dwarf and a catastrophic star that circulates closely – either another white dwarf or an unusual star rich in helium – in the so -called bilateral system.
The primary white dwarf will start by drawing gravity in a helium siphon from his companion. Helium will become so hot and thick, so that it will explode, resulting in a shock wave that would press and ignite the heart of the main star and lead to a second bombing.
“Nothing remains, the white dwarf is completely disrupted,” said Priam Das, a PhD in astronomical physics at New South Wales Canberra University in Australia, the author of the study that was published on Wednesday in the Nature Astronoly magazine.
“The temporal delay between the bombings is mainly determined by the time that the helium bombing is taken to travel from a pole from the star along the way to the other. It is only about two seconds,” said Evo Setinzhil, an astronomical physicist and author of the study.
In the most common type of Supernova, the remains of the huge explosive star are left in the form of a thick neutron star or a black hole.
The researchers used the multi -unit spectrum in the very large telescope, or Muse tool, to distribute the various chemical elements in the aftermath of Supernova. Calcium appears in blue in the image – an external ring caused by the first bombing and an internal ring per second.
These two calcium represent the “perfect smoking guide for the dual separation mechanism,” said Das.
Das said: “We can call this criminal astronomy – the duration of my makeup – because we are studying the remains of dead stars to understand the cause of death.”
Stars that reach eight times, our sun block seems destined to become a white dwarf. In the end they burn all the hydrogen they use as fuel. Then gravity leads to their collapse and explode their outer layers in a “giant red” stage, which eventually leaves behind a compressed nucleus – white dwarf. The vast majority of these do not explode like Supernovas.
While scientists knew that the type Ia Supernovas type, there was no clear visual evidence of this double bombing so far. The type Ia supernovas is important in terms of celestial chemistry in that it constitutes heavier elements such as calcium, sulfur and iron.
“This is necessary to understand the Hungarian chemical development, including the building blocks of planets and life,” Das said.
A sulfur shell was seen in the new notes of Supernova.
Iron is a decisive part of the formation of planets for the Earth, and of course, consisting of human red blood cells.
In addition to its scientific importance, the image provides an aesthetic value.
“It is beautiful,” said Seitenzahl. “We see the birth of the elements on the death of a star. Make the large explosion hydrogen, helium and lehium only. Here we see how calcium, sulfur, iron, and separation again to the host’s galaxy, is a cosmic cycle of matter.”
(Will Doneham’s reports, edited by Rosalba Operation) participated
