It was also visible at thenaked: scientists report in a report of the the discovery of the the fastest ever observed! It was just over a year ago: it appeared in the sky on June 12, 2021, only to vanish after just one day. “It was only about a day; the previous fastest nova was the one we studied in 1991, the V838 Herculis, which decayed in about two or three days “explains Summer Starrfield, professor e at the ASU School of Earth and Space Exploration.
Called V1674 Herculis, it is, as the name suggests, in the constellation of Hercules, visible fromduring the summer nights. She was discovered by chance, by a amateur based in Japan, then studied by several American astronomers and astrophysicists. Usually, such events last from a week to a few months. These appear in the sky as new hence the term Nova who has been chosen to designate them.
Fragments of white dwarfs
Corresponds to asudden and intense visible from to composed of a star and a . The latter is in fact a remnant of a dead star: following the not very massive when it runs out of fuel. Then go through the phase of , where its upper layers extend. Its outer layers are then ejected, leaving only the star’s core which compresses and turns into a white dwarf.
It is often found inthese particularly compact attraction of their less dense companion. When its matter deforms and writhes as it moves towards the white dwarf, it forms a . Inside this disc, the matter heats up intensely, so much so that it transforms into plasma, therefore into ionized. And this ionized gas heats up. Much. To the point of provoking, when the temperature and the reach peaks, thermonuclear explosions. Exit from sudden events which are then detected by astronomers.
Contains other mysteries
But be careful not to confuse it with aindicating the death of a massive star in Where is it , or the explosion of a white dwarf when it becomes too massive. However, they can, like supernovae, lead to the , similar to ours. This is what the research team is trying to study. ” We are still trying to understand how the Solar System was formed, where it is , assures S. Starrfield. One of the things we will learn from this nova is, for example, the amount of that was produced by this explosion. We are now pretty sure that a significant fraction of the lithium we have on Earth was produced by these types of explosions. ”
In addition to its speed, the researchers noted another peculiarity: the light and energy we receive from the V1674 Herculis pulse. Every 501 seconds there is a visible wobble in both the visible and the. Even today, one year later, this pulsation continues, always with the same regularity. “The most unusual thing is that this oscillation was observed before the explosion, but it was also present when the nova was brightest, by about 10 “says Mark Wagner, a researcher at the University of Ohio. In the future, the team intends to investigate the cause of the explosion, hence the processes leading to a major similar to this, and especially on the cause of the so short.