Observing a thruster star that has the fastest rotation of a white dwarf star
A dead star is rotating at a very high speed, making it have the fastest rotation rate known among other stars of its kind. It has been shown that it is a white dwarf star. What is that star? How fast does it have in its rotation around itself? What are its characteristics? Is it composed?
A white dwarf star located 2,015 light-years away, called (LAMOSTJ024048.51+195226.9), and its abbreviation (J0240+1952), was observed. It was noted that the speed of its rotation around itself exceeds the speed of any other white dwarf we know. Its rotation rate can only reach 25 seconds, thus breaking the previous record for a white dwarf called (CTCV J2056-3014) by a large margin, as the latter had a rotation rate of 29 seconds.
In addition, it is similar to another white dwarf with a high rotation speed, called (AE Aquarii), which has a rotation rate of 33 seconds. The similarity of the two stars (J0240+1952) and (AE Aquarii) lies in their having a special feature, which is that they are the only stars with They belong to a class of white dwarfs known as magnetic fan stars.
Every star has a companion (another star) in the binary sequence of its main formula (hydrogen fusion formula). During the hydrogen fusion process in the white dwarf's nucleus, the gaseous plasma is pulled from the companion under the influence of gravity and then thrown into space by the white dwarf's magnetic field, just as Propeller water away from the boat. You can imagine that the speed of plasma ejection in the case of a white dwarf like this (J0240+1952) may reach 3000 kilometers per second.
“The white dwarf (J0240+1952) will have completed so many cycles in the short period of time it takes people to read about it, it's really incredible,” says astrophysicist Ingrid Pellisoli of the University of Warwick in the UK.
She added: “The rotation is very fast, which means that the white dwarf must have a mass higher than average in order to remain with only its companion star and not completely collapse. The relationship of a white dwarf with its companion star requires that the dwarf pull material from its companion star under the influence of gravity, but when the companion star approaches the dwarf White is dominated by the magnetic field, and this type of gas - gaseous plasma - is drawn; It is highly conductive, and it gains a high speed from this process, which pushes it away from the white dwarf and out into space due to the magnetic field.”
in the space, A new white dwarf star is created when the elements that can fuse in the core of a star like the Sun run out. The star then ejects its outer matter into space, and the core collapses, turning into a very dense body that shines incredibly due to the remaining heat. These dead stars are - physically - very small. It is approximately the size of Earth, but its mass may reach 1.4 times the mass of the Sun.
Often, a white dwarf star will have a binary companion in a very close orbit, so close that the white dwarfs are pulling or accumulating material from their companion stars, and periodically exploding when the accreted material leads to massive hydrogen fusion in the white dwarf's atmosphere, and these explosions lead to contrasting In its brightness.
This binary - a white dwarf star and its companion - is known as a catastrophic variable star, and the white dwarf may eventually accumulate so much mass that it becomes unstable and explodes in a spectacular supernova (LA).
The white dwarf (J0240+1952) is a catastrophic variable. In the past, its companion red dwarf devoured enough material to greatly increase its rotation speed. Then, the white dwarf somehow developed a magnetic field. Astronomers believe that the increase in the rotation rate of the white dwarf The accumulator may create an internal generator, but we're still not entirely sure about that.
This magnetic field acts as a barrier to repel incoming plasma, expelling most of it into space. However, a small amount of plasma falls on the white dwarf and flows toward the magnetic poles. , causing a bright glow that allows astronomers to measure the star's rotation rate.
The rotation of the white dwarf (AE Aquarii) is slowing down at an unusually rapid rate, and researchers want to know; Do the two systems exhibit the same behavior? If so, we will be able to learn more about these rare and wonderful systems.
"It's only the second time we've found one of these magnetic fan systems, so we now know it's not a unique event," says astrophysicist Tom Marsh from the University of Warwick. "It proves that the magnetic fan mechanism is a general property that operates in these binary stars if they exist." "Appropriate conditions."
He added, “The importance of the second discovery is almost as important as the first discovery. It has now become possible to develop a model for the first and test it with the second to find out; "Does this model work, or not? The recent discovery has shown that the model actually works well. The model predicted that the star would have to rotate very quickly, and it does."
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