In 2017, researchers at the University of Canterbury in New Zealand discovered a quadruple system of
Numerical modeling consists of building a set of functions…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/a/0/8/a0817e96b9_50037926_soleil-simulation-vibrations- sismology . jpg” data-url=”https://news.google.com/sciences/definitions/matiere-modelisation-11321/” data-more=”Read more”> the orbit of each star it contains.
The youngest quadruple system ever found
Located in the set of small satellites…” data-url=”https://news.google.com/sciences/definitions/universe-constellation-21/” data-more=”Read more”>
The Southern or Australian Hemisphere corresponds to the geographic area that extends between the poles…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/2/8/1/281a5ce994_50038918_southern -hemisphere -luis-miguel-bugallo-sanchez-wikimedia.jpg” data-url=”https://news.google.com/planet/definitions/geography-southern-hemisphere-12813/” data-more=”Read more” > HD74438 was discovered by the during a monitoring campaign which has already identified more than 100,000 stars in ours . Then everything was done thanks in the climax based at the University of Canterbury in New Zealand and the Southern African Large Telescope in South Africa. They enable the characterization of that is, to decompose the white light
The wavelengths of visible light range from about 380 nm (violet) to 780 nm (red). The visible spectrum is…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/b/6/9/b697a0c09f_85912_lumiere.jpg” data-url=”https:// news.google.com/science/definitions/physics-light-326/” data-more=”Read more”> it emits and analyze the intensity for each . Thanks to this method, they can deduce not only the temperature of the star, but also its composition .
— Maxime Duprez (@maximaxoo) May 16, 2022
The mass…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/1/d/9/1d9cd1d45f_50034577_eruption.jpg” data-url=”https://news. google.com/sciences/definitions/univers-soleil-3727/” data-more=”Read more”> It is already 4.6 billion years old! This makes it the youngest quadruple system found to date. These four-star plants are rare, in the order of a few percent which are already quite rare and have complex evolutions. In this particular case, the Outer exerts a gravitational pull on the inner system and tends to warp the orbits of its two stars.
A future thermonuclear supernova?
To model the possible evolutions of HD74438, the team of scientists modeled the gravitational effects driving the quadruple system. They showed that theof the internal system tended to increase. In practice, this means that the trajectory becomes less and less circular: a could be triggered after this deviation between a star of each system.
And the result of this collision would be… first of all, a! He is not here yet long awaited. “ A star like our sun will end its life as a small, dense, dead star known as a white dwarf White dwarfs cannot exceed the so-called Chandrasekhar limit (about 1.4 solar masses).”explains Professor Karen Pollard, first author of the study and astrophysicist at the University of Canterbury. “If so, either due to mass transfer events or the melting point of water, which is the temperature at which the ice…” data-image=”https ://cdn.futura-sciences.com/buildsv6 /images/midioriginal/7 /d/0/7d0df59f3c_82086_fusion.jpg” data-url=”https://news.google.com/sciences/definitions/physics-fusion-15305/” data-more=”Read more”> , it can collapse and create a thermonuclear supernova. » And that’s exactly what would happen with HD74438!
“The evolution of star quads like HD 744384 therefore represents a promising new way to detect thermonuclear supernova explosions in The history of the universe begins about 13.7 billion years ago in an extremely dense and hot soup. The laws of physics as we…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/1/5/5/1557798396_80921_universe.jpg” data-url=”https : //news.google.com/sciences/definitions/astronomy-universe-15239/” data-more=”Read more”>, closes them. fInterestingly, 70% to 85% of all excerpts from …” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/a/9/4/a940132305_50034136_supernova1987a.jpg” data- url =”https://news.google.com/sciences/definitions/universe-supernova-60/” data-more=”Read more”> It is now believed that thermonuclear cells result from the explosion of sub-Chandrasekhar-mass white dwarfs. B. through mass transfers or mergers, these White can explode in a thermonuclear supernova. » What question do the current models of thermonuclear supernovae ask?
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