In 2018, astronomers observed the first supernova explosion of a new class called “the cow”. Today, a team reports on their discovery of news of these amazing eruptions. The brightest is observed on x-rays.
after Rather, it turned out that the AT2020mrf emits 200 times more X-rays than the AT2018, which is the first explosion of its kind. “the cow” Discovered in 2018. Unheard of. “I re-analyzed several times because I couldn’t believe it”, so that Yuha, Yao, a researcher at Caltech University (US), in a .
The ‘active engine’ behind the starburst
Remember that when a Explode, leave behind, either a be one Neutrons. The remnants of stars are usually relatively inactive. But according to researchers, the events “the cow” You should hide like a mid-engine Which feeds intense and continuous x-rays. “It probably has something to do with the ancestral star type.”Yuha Yao suggests.
large amount of. Or a fast-spinning neutron star that astronomers call a . But to understand why a mid-engine As an activist, it will certainly be necessary for researchers to study further of these eruptions. Because this class of “the cow” It seems that he wants to become more diverse than astronomers imagined.Chest and rapid contrast X-ray seen in the AT2020mrf provides evidence that the nature of this mid-engine Maybe
Astronomers have discovered a new class of cosmic explosions
In 2018, aVery bright, 200 million light-years away from baffled astronomers. A fleeting phenomenon that seemed isolated. But researchers have just identified two similar species. Enough to form a new class of cosmic explosions.
Article fromPosted on 05/28/2020
The story begins in June 2018, when astronomers witnessed an amazing cosmic explosion about 200 million light-years away from the Milky Way. It was called AT2018 and soon it was called – “Cow” – this strange transient phenomenon is observed both from Earth and from space. It is much brighter than a supernova. And the curve of light develops differently. mystery.
Since then, astronomers have discovered two similar transient phenomena. The first, also observed in 2018, occurred about 3.4 billion light-years away. called – and more scientifically, ZTF18abvkwla. susceptible It looks as strong as a file .
It took us two years to find out.
The second transient phenomenon similar to “the cow” I was surprised a few years ago, in 2016, at . “It was so unusual that it took us two years to find out”, says Raffaella Margotti, a university researcher northwest, in one (NRAO, USA). I have already pushed into space the amount “unexpected” of gases and particles in more than 55% of .About 500 million light-years away, researchers call it
Astronomers know phenomena capable of ejecting matter at speeds close to the speed of light. Gamma ray bursts and neutron star collisions. But still in very small quantities. On the order of one in a million of . The evidence, according to the researchers, is that we are dealing here with a new class of baptized fast blue light passerby (FBOTs) – “transient blue optical phenomenon” To explain the phenomenon’s speed, a few days, and its peak check in the domain blue.the . “Here, we’re talking about 1 to 10% of the mass of our Sun”notes Deanne Copejans, a researcher at the university northwest, in one
End of life stars in dwarf galaxies
Astronomers believe that at the starting point of FBOTs, there is a file . Remember that a supernova explosion in The core produces a spherical wave of matter that propagates through space. If a disk of matter forms around the neutron star or the black hole that was born from the explosion – “Main Ingredient” Propelling narrow jets of material at nearly the speed of light, the researchers say, it may be that these jets are causing what astronomers call Gamma. Researchers are talking about this disc and these puffs of matter ” engine “.
And FBOTs seem to have such a ” engine “. But it consists ofThick, the star lost it before it exploded. Maybe because of a girlfriend . Therefore, when the blast wave hits this material, the luminosity of the phenomenon reaches its peak. The same applies to transmission in the radio field.
Astronomers believe that the stars at the origin of this new type of cosmic explosion are different from those that produce gamma-ray bursts. Since the three phenomena of this kind that have been observed so far are localized inThey imagine that it is these dwarf galaxies that allow this kind of stellar evolution. The stars are poor in elements other than and the As found in this type of galaxy, it actually loses less matter during its lifetime. So they are likely to produce more massive explosions when you’re done.
The researchers also warn that this phenomenon may result from stars being torn apart by medium-sized black constellations. To be sure, you will have to keep an eye on a few FBOTs.
This phenomenon will not be so rare. Astronomers believe other FBOTs are lurking in their data. “We were able to identify them as something different, a rather strange supernova, but since we only had low-rate observations and in the field of optics…”Raffaella Margotti says in a university statement northwest. Indeed, the transient aspect of the phenomenon requires high-speed observations that sweep across vast expanses of sky. And if the field of optics can provide information about moving particles “slowly” At about 10,000 km/s it is necessary to use X-rays or radio waves in the hope of forming a more complete picture of these .
“Proud thinker. Tv fanatic. Communicator. Evil student. Food junkie. Passionate coffee geek. Award-winning alcohol advocate.”