"O que se vê são duas bolhas emitindo raios gama, que se estendem por 25.000 anos luz ao norte e ao sul do centro da galáxia," disse Doug Finkbeiner, astrônomo do Centro Harvard-Smithsonian de Astrofísica, em Cambridge, Massachusetts, EUA, que reconheceu a estrutura pela primeira vez. "Nós não compreendemos totalmente a sua natureza ou origem..."
NASA's Fermi Gamma-ray Space Telescope has unveiled a previously unseen structure centred in the Milky Way. The feature spans 50,000 light-years and may be the remnant of an eruption from a supersized black hole at the centre of our galaxy.
"What we see are two gamma-ray-emitting bubbles that extend 25,000 light-years north and south of the galactic centre," said Doug Finkbeiner, an astronomer at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, who first recognised the feature. "We don't fully understand their nature or origin..."
The structure spans more than half of the visible sky, from the constellation Virgo to the constellation Grus, and it may be millions of years old. A paper about the findings has been accepted for publication in The Astrophysical Journal.
Finkbeiner and his team discovered the bubbles by processing publicly available data from Fermi's Large Area Telescope (LAT). The LAT is the most sensitive and highest-resolution gamma-ray detector ever launched.
Nenhum comentário:
Postar um comentário