When astronomers spotted the designated white dwarf LP 40-365 about 2,000 years of land lighting in 2017, it was not difficult not to read.
Rocketting against the rotation of the Milky Way, the white dwarf traveled nearly 2 million mph (about 3.2 million km / h), which is about four times faster than our sun revolves around the galactic core. At this speed, the star is well on the point of escaping the gravitational attraction of the Milky Way and enter the intergalactic space.
More remarkable, according to life, the composition was its composition, charged with heavy metals such as oxygen, carbon and magnesium (all atom larger than helium is considered a metal by astronomers). Although it is not unusual for white dwarfs to have carbon and oxygen compositions, this star had magnesium and neon, which are typically formed under the intense energy of a supernova.
These LED researchers with the Department of Astronomy of the University of Boston from the University of Boston to study the star and the room together in the puzzle of what sent it grained through the galaxy to its ultimate destination. in the intergalactic space. Their conclusions, published in the letters of the astronomical magazine, points to the catastrophic supernova.
White dwarf stars are the hospice phase of a star life cycle. When a primary sequence star lacks fuel to burn during nuclear fusion, there is not enough external strength to maintain the intense mass of the star and collapses itself. If the mass of a star is more than about eight times the mass of the sun, the mass is so great that the result is a neutron star or even a black hole.
The small stars escape this spell, however. Their collapse triggers a catastrophic explosion known as Supernova, which disperses most of the mass of the star in a massive nebula that will help to form new stars and solar systems. What remains is a luminous and intensely hot envelope of the star of the star, known as the white dwarf, whose mass is retained not by the fusion but by a quantum phenomenon involving electrons.
Although technically dead, like the nuclear fusion phase of the star’s life is over, these stellar corpses will radiate heat and light for a one billion angle of about one billion before going completely dark. And to become a black dwarf. In some cases, binary star systems can end up with two white dwarfs, and that’s where things are interesting.
The smallest of the two white dwarves will begin to consume the biggest material, because the more massive white dwarfs are really smaller. If a white dwarf consumes too many materials however, the quantum process that prevents the star from collapsing more destabilized and the white dwarf again gets again in another violent supernova.
That’s what the researchers of Bu Raw have arrived at this star.
“Having passed through partial detonation and survive always is very cool and unique, and it is only in the last few years that we started to think that this type of star could exist,” said Odelia Puterman, An old student burst who cohits the author of the paper.
“The star is essentially educated from the explosion and we [observing] its output rotation,” added Pureman.
What is not known is if the star was the star of the partner, or a morceine of the star which was supernova, well based on the speed of his rotation, the team of the BU believes that The star is essentially bursts of the most massive star that has happened supernova.
“These are very strange stars,” said JJ Hermes, Copyright of the Journal and Associate Professor of Astronomy in Bu. “What we are seeing is the by-products of violent nuclear reactions that occur when a star breaks.”
