Sgr A East

Sagittarius A East. Credit: X-ray: NASA/CXC/Nanjing Univ./ P. Zhou et al. Radio: NSF/NRAO/VLA

  • Researchers have actually discovered the very first evidence for an uncommon type of outstanding explosion, or supernova in the Milky Way
  • This intriguing things lies near the center of our galaxy in a supernova remnant called Sagittarius A East (Sgr A East).
  • Chandra information exposed that Sgr A East may come from a special group of Type Ia supernovas.
  • This outcome assists astronomers understand the different manner ins which white dwarf stars can take off.

Astronomers have found evidence for an unusual type of supernova near the center of the Milky Method galaxy. This composite image contains data from NASA‘s Chandra X-ray Observatory (blue) and the NSF’s Very Large Selection (red) of the supernova remnant called Sagittarius A East, or Sgr A East for brief.

Researchers were able to utilize Chandra observations targeting the supermassive great void and the area around it for a total of about 35 days to study Sgr A East and discover the unusual pattern of elements in the X-ray signature, or spectrum. An ellipse on the annotated version of the images lays out the area of the residue where the Chandra spectra were acquired.

The X-ray spectrum of Sgr A East reveal that it is a strong prospect for the remains of a so-called Type Iax supernova, a special class of Type Ia supernova surges that are used to accurately determine widths space and study the growth of the Universe.

Sgr A East Labeled

Sagittarius A East (identified). Credit: X-ray: NASA/CXC/Nanjing Univ./ P. Zhou et al. Radio: NSF/NRAO/VLA

Astronomers are still debating the reason for Type Iax supernova surges, but the leading theory is that they include atomic reactions that take a trip a lot more gradually through the star than in regular Type Ia supernovas. This fairly slow walk of the blast leads to weaker surges and, thus, different quantities of components produced in the surge. The researchers discovered this unique pattern of aspects in the Chandra observations of Sgr A East.

In other galaxies, researchers observe that Type Iax supernovas take place at a rate that is about one third that of Type Ia supernovas. If Sgr A East is more youthful than 2,000 years and is a Type Iax supernova, this research study suggests that our Galaxy is in positioning with respect to the relative numbers of Type Iax supernovas seen in other galaxies.

Previous research studies had argued that Sgr A East was the remnant from the collapse of an enormous star, which is a wholly different category of supernova, although a typical Type Ia supernova had actually not been eliminated. The current research study performed with this deep Chandra data refute both the enormous star and the typical Type Ia analyses.

These results will be published on Wednesday February 10 th, 2021 in The Astrophysical Journal, and a preprint is readily available online. The authors of the paper are Ping Zhao (Nanjing University in China, and formerly at the University of Amsterdam), Shing-Chi Leung (California Institute of Technology), Zhiyuan Li (Nanjing University), Ken’ ichi Nomoto (The University of Tokyo in Japan), Jacco Vink (University of Amsterdam), and Yang Chen (Nanjing University).

NASA’s Marshall Area Flight Center manages the Chandra program. The Smithsonian Astrophysical Observatory’s Chandra X-ray Center controls science from Cambridge Massachusetts and flight operations from Burlington, Massachusetts.


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