This outbreak, as they note, occurred in a nearby galaxy
The American researchers suggested that their telescopes have recorded the exact moment when a star collapsed to form a black hole or a neutron star.
To such conclusions scientists came after combining multiple image sources, including hard x-rays and radio waves.
17 Jun 2018 telescopes-Gemini ATLAS of Hawaii, was discovered in the constellation of Hercules is surprisingly bright anomaly. The object that called AT2018cow or “Cow” (Cow), quickly flared up and then disappeared almost as quickly.
This outbreak, as they note, occurred in a nearby galaxy CGCG 137-068, located in the constellation Hercules at a distance of 200 million light years from Earth. It lasted about three days, and its peak brightness was about ten times higher than a typical supernova.
Estimating the distance to the galaxy CGCG 137-068, astronomers believe that it is “right around the corner.” “Two hundred million light years for us is close. It is the nearest temporary facility of its kind that we have ever found,” say the authors.
“After the object Cow was first discovered, he immediately caught the attention of astronomers. We thought it was a supernova. But what we saw defied our current ideas about stellar death,” says Professor of physics and astronomy, Raffaella Margutti from northwestern University in Evanston, who led the study.
For example, the anomaly was unnaturally bright 10-100 times brighter than typical supernovae. She broke out and disappeared much faster than other known stellar explosions, particles, flying at a speed of 30,000 kilometers per second. In just 16 days, the object has already rejected most of his power. In a universe where some things are there are millions and billions of years, two weeks are a blink of an eye.
“We immediately realized that this source is switched from the inactive state to the peak luminosity in just a few days. It was enough to get all excited because it was so unusual and, in astronomical terms, it was very close,” – emphasizes Margutti.
As hope of astrophysics, follow-up observations AT2018cow and the search for other similar outbreaks will help scientists to clarify the role of supernovae played in “seeding” the Universe with heavy elements and other building blocks of Earth and other planets.
The team of Professor Margutti included, among other scientists, and freshman Daniel Brethauer.
“Getting the opportunity to contribute to something advanced and international understanding AT2018cow is a surreal experience. Help the international experts to find out what AT2018cow even in the smallest way – it has surpassed my wildest expectations in early summer. This I will remember for the rest of my life,” said Brethauer.