The following was originally posted by gmagee in November 2011:<\/p>\n
Astronomers are now surprised that galaxy mergers are not necessary to trigger the active state of galactic cores. \u00a0 They conclude that another “secular” process must be responsible. They were also surprised that the early galaxies look so similar to nearby galaxies.<\/p>\n
http:\/\/www.physorg.com\/news\/2011-10-galaxy-mergers-trigger-black-hole.html<\/a><\/p>\n Response to the above posting:<\/strong> The physics of subquantum kinetics, however, provides an easy solution. \u00a0An external stellar accretion event could serve as a trigger, but the energy released by its accretion would not be the main power source for a newly activated core. \u00a0Genic energy arising within the core is the main source powering a core outburst. \u00a0A quiescent galactic core eventually becomes unstable because its internal matter creation has caused its\u00a0continuous growth,\u00a0deepened its gravity well, and pushed its genic energy production past a certain critical threshold. \u00a0The energy released by a stellar infall event can then trigger the unstable core to enter a runaway mode of excessive genic energy production, boosting its genic energy output by a factor of a hundred thousand to a million. \u00a0This active period lasts until the core has explosively ejected enough mass to once again return to its quiescent, low genic energy production state.<\/p>\n P. LaViolette The following was originally posted by gmagee in November 2011: Astronomers are now surprised that galaxy mergers are not necessary to trigger the active state of galactic cores. \u00a0 They conclude that another “secular” process must be responsible. They were also surprised that the early galaxies look so similar to \u2026 Continue reading
\nThe point that gmagee makes above concerns what induces a galaxy’s supermassive core to turn on and enter its active state. \u00a0Astronomers had originally thought that galaxy collisions triggered this activity. \u00a0If so,\u00a0the discs of such galaxies should be seen to be severely disturbed.\u00a0\u00a0But observations now show that this is not the case. \u00a0Kocevski et al. studied galaxies as far away as 11 billion light years and found that those with\u00a0active\u00a0cores looked no different than disc galaxies with nonactive cores. \u00a0They conclude that whatever turns on a supermassive galactic core must occur internal to the galaxy. \u00a0One suggestion has been that a galactic core might turn itself on by randomly accreting a passing star. \u00a0But, this too is problematic. \u00a0For a single star is unable to provide enough matter to fuel the energy output of an active galactic nucleus. \u00a0Moreover it is difficult to imagine how matter could become accreted by a galactic core since even in its off state a core radiates a substantial cosmic ray radiation blast.<\/p>\n
\n2011, updated February 2013<\/p>\n","protected":false},"excerpt":{"rendered":"