26 July 2019
Three massive black holes caught in the act of merging
...believed to be ubiquitous throughout the Universe; most local galaxies, if not all, are believed to harbour one ... are type-2 Seyfert galaxies, making SDSS J0849+1114 the only known system to contain triple type-2 Seyfert nuclei. Seyfert’s are a ...
April 2024
Rotation in the Universe
...red-shift component. Arp’s suggestion that energetic quasars ‘emit’ objects which ‘evolve’ through a Seyfert galaxy stage to end up as spiral galaxies is a very different formation scenario to that which is generally assumed. If there is merit in his...
20 September 2017
A new way to 'weigh' extragalactic black holes
...By noting that the flare happened to occur near the central nucleus of a galaxy and by looking at prominent peaks in the spectral energy distribution of the X-... the cores of Seyfert galaxies for example, where traditional methods do not work so well.
