Star remnant discovered that exploded 1,700 years ago

When a big star reaches the end of its life, supernova It explodes with a tremendous flow of energy called. As the shock wave from the explosion spreads into space, it creates a residue that can last for thousands of years. This kind of relic Hubble Space Telescope and researchers are 1.7000 They watched it until the supernova that occurred years ago.

Images taken 10 years apart were compared

1E 0102.2-7219to calculate the age of Hubble researchers, 10 years compared the images taken with each other. By comparing the two, ejecta They could see that (knot) clusters spread out over time.

By running this speed backwards, the time at which the supernova should occur can be calculated. This result is different from previous attempts to precisely determine the age of the residue using data from different cameras. In addition, the new result using data from the camera provides a more accurate value.

Research team leader Danny Milisavljevic from Purdue University on the research, “A previous study compared images over the years with two different cameras on Hubble, Wide Field Planet Camera 2 and Advanced Camera (ACS). However, our study makes the comparison much more robust by comparing the data received with the same camera, ACS; It was much easier to track knots using the same instrument. The fact that we can make such a clear comparison between the images taken 10 years apart is a proof of Hubble’s longevity. found in the description.

Supernova When it occurred, it launched the star’s crushed heart (a neutron star) into space. Neutron star 2 million It estimates that it has moved more than miles.

On the subject, team leader John Banovetz said, “This is pretty fast, and at the very edge of how fast we think a neutron star can move. ” said.

Researchers have identified an object that could be the neutron star in question, but they’re not sure if this is the object they’re looking for yet.

“New research questions whether the object is actually the surviving neutron star of the supernova explosion. This is a small cluster of supernova ejecta that potentially only illuminates and supports ” explains Banowetz.


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