Active Galaxy Hercules A: Visible & Radio Comparison

The active galaxy Hercules A was given that name because it is the brightest radio source in the constellation of Hercules. Astronomers found that the double-peaked radio emission corresponded to a giant elliptical galaxy cataloged as 3C 348. Unusually, this behemoth galaxy is not found within a large cluster of hundreds of galaxies, but rather within a comparatively small group of dozens of galaxies. The ‘active’ part of the galaxy is the supermassive black hole in its core, which spews out strong jets of energetic particles that produce enormous lobes of radio emission. Some astronomers suspect that Hercules A may be the result of two galaxies merging together.... Read More إقرأ المزيد | Share it now!