Detecting a strange explosion in a distant galaxy

Astronomers saw such a strange explosion in the universe that they did not even know what to name in accordance with the nature of the explosion. However, the explosion was discovered by NASA's Swift satellite on March 28, 2011, but it still emits high radiation energy like a gamma ray explosion, and the event lasted for 11 days. . Gamma rays finally exploded in about 30 seconds.

Fireworks in the Universe: The panorama depicts a confusing cosmic explosion combining images from Swift satellites: optical / ultraviolet telescopes (white and purple) and its X-ray telescope (color yellow and red), taken during the 3.4-hour period on March 28, 2011

The trait is not the same as a gamma ray explosion: the explosion has faded and then flared again, and emits pulses of radiation that break off energy lasting hundreds of seconds.

' This may be a phenomenon we have never seen or a familiar event that we have never observed this way before, ' said Andrew Fruchter, who works at the Space Telescope Science Institute. Baltimore, USA. The explosion may have been created by a star torn apart when venturing too close to a black hole in the galaxy, according to Andrew Fruchter. The amount of gas from this star that falls into the black hole may have caused a huge gravitational pull, and emitted a stream of X-rays and gamma rays that happened to happen at a time when researchers were Observe this phenomenon directly from the Earth.

A radio wavelength image was taken on May 29, along with another image taken by Hubble Telescope in light visible on April 4, supporting the study. Images show that the explosion took place about 3.8 billion light-years from Earth, at the center of a galaxy, where a supermassive black hole exists, and on the other hand, may have been a star Torn apart by a smaller black hole, Fruchter notes.

'The state of the explosion has faded and then flared again as the result of a star being shredded under the effect of a black hole sounds reasonable ,' said Andrew MacFadyen, who works at New York University. USA. The time of the explosion ' is more than anything we could expect from the collapse of a single star,' which is the traditional model to generate a gamma-ray burst, Andrew MacFadyen to speak.

However, according to Stan Woosley, working at the University of California, Santa Cruz, USA, the event could be explained: by the collapse of a giant star due to the effect of internal attraction. Black holes, a miniature version of that process often produces a gamma ray burst. In the woosley scenario, the giant star's core collapses to form a black hole, but it takes 11 days for this star's outer shell to collapse and emit radiation, which explains why the stars Astronomers observe the explosion for an unusually long time.