Neutron stars are celestial bodiesIts existence was predicted in the 1930s, when they could form when a star exceeded 8 Sun light. There comes a time when thermonuclear reactions are produced Resistant radiation Under their own These stars are stopped. Their heart The CEA at the bottom of this article will generate the sequence of complex events discussed in the video and this will lead to an explosion, more precisely what it is called Type II. In many cases, the remainder adds up to a compact star Some have a mass of approximately ten kilometers in diameter (among others, this one) It develops). Abstraction forces most electrons and Before the eruption the star’s iron core converges following a decay reaction On the contrary, it produces neutrons, hence the name of these alien stars.
Theories of neutron galaxies and the gravitational pull leading to the formation of black holes are the first works built in the late 1950s and early 1960s, dating back to 1939, and we are indebted to them. . Essays written with his students during that time are: », With Georges Volkoff, and With Heartland Snyder.
What is a neutron star? What is the difference between these stars and our sun? Interpretations by Roland Lehuk, an astronomer at the CEA. Video co-produced by L’Esprit Sorcier. © CEA Research
From pulsars to magnets
It has been known for some years that some neutron stars have extraordinarily strong magnetic fields. So we talkTo mark these magnetic stars. An ordinary neutron star is already strongly magnetized because of its intensity Is on average 10 billion times larger than a magnet . But a magnet is usually a thousand times stronger.
The magnets rotate like thisAlso, like all neutron stars, they have high surface temperatures. So it can create phenomena like its magnetic plasma on the surface of the sun, especially in the coronal loops.
Neutron stars with coronal loops?
Remember the coronal loops, and so onIs strongly connected to the solar magnetic field and the events form the active areas of the sun. Occurs frequently with lines of intense and dynamic magnetic fields, which can save a lot Before releasing her.
However, we can try to better understand the structure and evolution of neutron stars in many ways, especially by studying This is exactly what astronomers do with their instruments Internal composition of the neutron star Explorer () Of NASA aboard .
Nisar allowed them to take a closer look at a magnet already found and named SGR 1830-0645 (SGR 1830 for short). This was particularly marked by a strong eruptionOn October 10, 2020, it was discovered from space by the Neil Kehrels Laboratory From NASA.
SGR 1830 Presentation of invention made with magnet. To get the most accurate French translation, click on the white rectangle in the lower right. English verses appear later. Then click on the nut to the right of the rectangle, then “Verses” and finally “Auto Translate”. Select “French”. © NASA’s Goddard Space Flight Center
Plate tectonics in neutron star?
SGR 1830 is located somewhere , Swift’s vision and Niger’s vision show a sequence of continuous pulses in the X – ray field, indicating that the detected neutron star rotates on its axis every 10.4 seconds.Towards Sobiski’s armor (scutum), a small galaxy just east of the snake’s tail. As explained in the video and a post above
However, on closer inspection, the stimuli are tripled and finally doubled. The best way to interpret these observations is to initially cover three areas, which are particularly hot and therefore bright, as the temperature is above one million degrees. In fact, the theory behind these areas is that they are equivalent to the sunspots and the legs of the sun’s coronal loops. The two of them move and eventually merge, reducing these particularly bright areas from three to two. During these trips TheMelted internally in the star Such as It also occurs in contact with the kinetics of magnetic coronal loops on Earth.
It is certain that this is the first time we have seen the evolution of “sunspots” on the surface of a neutron star.
The explosion of very large stars in gravitational supernovae enriches the galactic medium with chemical components synthesized by nuclear fusion, while the collapse of the center of the star forms a neutron star or black hole. The transition between the collapse of the center and the ejection of the star envelope poses a challenge to the theoretical understanding of supernovae. A hydraulic experiment designed and carried out at CEA made it possible to reproduce by analogy one of the cases of hydrodynamic instability that facilitates explosion. This experimental approach complements numerical simulations. Discover this animation experience and detailed descriptions of supernova explosions and the formation of neutron stars. The animated film was produced and co-sponsored by CEA and ERC, and was directed by Studio Anemia. Scientific and technical design: T. Foglizzo, J. Guilet, G. Durand (CEA). © CEA Research