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Sagittarius A*, Supermassive Black Hole, Composite
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Código da imagem : HRJFJY Dimensões : 3.600 X 3.600 pixels Orientação : quadrada |
Tamanho máximo não comprimido :
37,1MB |
| Pauta: | Sagittarius A*, Supermassive Black Hole, Composite |
| Título: | Sagittarius A*, Supermassive Black Hole, Composite |
| Descrição: | Sagittarius A* is a bright and very compact astronomical radio source at the center of the Milky Way Galaxy, near the border of the constellations Sagittarius and Scorpius. The center of the Milky Way galaxy, with the supermassive black hole Sagittarius A* (Sgr A*) located in the middle, is revealed in these images. New evidence has been uncovered for the presence of a jet of high-energy particles blasting out of the Milky Way's supermassive black hole. As the jet fires away from Sgr A*, it travels through space until it hits gas several light years away. (The region around the Milky Way's black hole has many clumps of gas and dust.) Once the jet hits, it triggers the formation of a shock front. This interaction also accelerates electrons, generating X-rays as the electrons stream down the path of the jet, past the shock front. The shock front is also of interest because it is unusually wide in the radio emission compared to the more narrow profile of the jet in X-rays. This suggests that there may be a secondary, weaker outflow, which might be like a sheath or cocoon surrounding the jet with an opening angle of around 25 degrees. Sgr A* is about 4 million times the mass of the Sun and lies about 26,000 light years from Earth in the center of the Galaxy. Astronomers have been looking for a jet from Sgr A* for years since it is now common to find jets tied to a range of cosmic objects on both big and small scales. Release date November 20, 2013. |
| Coleção: | Alamy |
| Crédito: | Science History Images / Alamy / Fotoarena |
| Disponibilidade: | imediata |
| Direito de uso: | Direito controlado |
| Autorização do(a) modelo: | não |
| Autorização da propriedade: | não |
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