Using data from NASA’s Fermi Gamma-ray Space Telescope and other facilities, an international team has found the first gamma-ray binary in another galaxy and the most luminous one ever seen. The dual-star system, dubbed LMC P3, contains a massive star and a crushed stellar core that interact to produce a cyclic flood of gamma rays.
By combining X-ray data from NASA’s Chandra X-ray Observatory over a 15-year period with radio data from the Australia Telescope Compact Array, astronomers have a better understanding of the active galaxy Pictor A, the supermassive black hole at its core and the enormous jet of particles it generates travelling at nearly the speed of light into intergalactic space.
A team of Australian and Spanish astronomers have caught a greedy galaxy gobbling on its neighbours and leaving crumbs of evidence about its dietary past. Their successful and novel approach to investigating how galaxies grow is being used in a new program to further refine the best models of galaxy evolution.