After the antimatter supernovae, the electron capture supernovae are here. This concept is about 40 years old, but the series of solid observations that the Universe knew the speculations of astrophysicists, and that the supernova SN 2018zd is indeed an example of this fascinating phenomenon, describes the famous supernova from 1054.
Theof SN 2018zd first fell into the web Los Compress Laboratory But, because there were so many in the supernova This did not allow them to fit into the structure of the now well-known two major types of supernovae, and astronomers entered Nuspier’s astronomical archives, which contained memories of galaxy observations. 2146, do with Hubble. Images of this restricted spiral galaxy From , Revealed The forerunner of SN 2018zd is said to be a super star, a super-sign branch of giants (Super-symptomatic giant branch Or Sagb in English).
Nuclear astronomy, the key to supernovae
It was not until the early 1930s that astronomers Walter Bad and Fritz Zwicky realized the need to introduce a new genre in astronomy. , These very bright unstable stars appear only once in the sky and then disappear forever. Then the name they propose will create a fortune: . My Compagnie de Rudolf Minkowski, And the nephew of the famous mathematician Herman Minkowski, Pat realized that these supernovae could be divided into two types. And the properties of the light curves are not particularly uniform with changes over several weeks. Other categories will be included, but this work is in the form of a modern classification with SN II and SN Ia.
Animated film Valley of Stability Atomic physics shows how stars work and creates the thing we created. We will find out how stars live by attaching nuclei to hearts, and how the catastrophic results of some of them form very large nuclei. © CEA, Anemia 2011
In the 1930s, Walter Bad and Fritz Zwicky understood that Chadwick’s discovery was too soon With his student Volkoff, Richard Dolman uses conclusions about the spheres of fluids , And makes the first real calculations considering the neutron stars. In early 1939, these two researchers presented them as star-sized nuclei. Together with fellow student Hartland Snyder, Oppenheimer will study what happens if such objects fall under the force of gravity, laying the foundation for the theory .In 1932, some supernovae exploded. With them Dynamic stars . In 1938,
In the case of an SN Ia, things are completely different. It all starts with a star with a mass of less than 8 solar masses, which is formed by the loss of mass and which has a recessive center with atoms. (About 1.4 solar masses), the star does not collapse under its effect Because a Decomposition of relativistic electrons as we say in the words . The white dwarf will explode with a thermonuclear explosion By Its mass is found to be greater than that of Chandrasekhar.And basically. Thermonuclear reactions also stand there, as long as there is mass Nothing more than popular
A relative electron gas absorbed by nuclei
The attentive reader will notice that so far there is no question as to the fate of stars with masses between 8 and 10 solar masses. The theory of electron supernovae was designed in the early 1980s to clarify the fate that awaits them. , Then by other nuclear astronomers.
As for these stars, they form into a white dwarf, but their heart begins to thawAnd you Instead of carbon. There comes a time when the decomposed electron gas is captured by these nuclei, although the star is not large enough to generate thermonuclear reactions leading to iron nuclei.
When the electron gas disappears, theTherefore, it is a new type of supernova for energy output and gravitational pull, giving the electron supernova, but identical with the center of the neutrons remaining by the explosion.
The birth star of SN 2018zd was actually a sock, so sufficiently, chemical composition anomalies were detected and the supernova did not generate many radioactive elements, arguing with other characteristics to make SN 2018zd a much stronger candidate. Title of the Electron Supernova.
As such, it gives more hope to a hypothesis proposed in the case of a mythical supernova, of which in 1054, we still observe what remains today and the resulting neutron star. The neutron was much brighter compared to the SN II models that make up the star. They decided it was his S.N. As seen in the case of 2018zd, the eruption of the supernova may have been artificially increased by the collision with the object rejected by the parent star, and the electron supernova models predict significant mass losses before the star explodes.. In fact, some astronomers were allowed to know the supernova, according to the data of the time