“Our study shows that the luminosity declined until about 2001 owing to radioactive disintegration of compounds formed by the explosion. Over the last ten years, however, it began to shine more brightly again,” says Josefin Larsson at the Department of Astronomy.
Caption The images were captured in the red segment of the visible spectrum. However, the colours were added afterward and do not correspond to what we would see with our eyes. Different scales were used for the ring and the rest of the image to make details stand out more clearly. Stockholm university
“In the article we show that the increase is a result of x-ray radiation from the surrounding gas ring shining on the supernova. The change in the dominant energy source marks the transition from a supernova to what we call a supernova remnant.”
A supernova is the extremely bright explosion that occurs when a star of high density dies. The outer parts of the star are slung outward, while the innermost part forms a neutron star or a black hole. In the explosion, heavy elements are formed that subsequently come to be parts of new stars and planets.
”Supernova 1987A exploded in our neighbouring galaxy the Large Magellanic Cloud roughly 24 years ago. Since the supernova is so close, we have been able to study the consequences of the explosion with great precision for a long time with the aid of the Hubble Space Telescope,” says Larsson.
Images of Supernova 1987A taken with the Hubble Space Telescope between 1994 and 2009 show that what is shining in the middle are the remains of the star that exploded, while the ring consists of gas emitted from the star tens of thousands of years prior to the explosion. It can clearly be seen how the material that was sent out in the explosion is expanding and changing in luminosity over time.
The scientists from Stockholm University that took part in the project are Josefin Larsson, Claes Fransson, Göran Östlin, Per Gröningsson, Anders Jerkstrand, Cecilia Kozma, Jesper Sollerman, and Peter Lundqvist.
Viktor Sandqvist | idw
Tracing aromatic molecules in the early universe
23.03.2017 | University of California - Riverside
New study maps space dust in 3-D
23.03.2017 | DOE/Lawrence Berkeley National Laboratory
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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