84 citations · 533 across the 50 of their papers we have counts for
9 papers · 1 filter
A Critical Eddington Ratio for X-Shaped Radio Galaxies
David Garofalo
We derive a quantitative condition for the formation of X-shaped radio galaxies by evaluating the competition between black hole spin evolution and the radiative fading of relic pl…
On the origin and nature of double-double radio galaxies
David Garofalo, Zhiyuan Liu, Atticus V. Magerko
Double-double radio galaxies (DDRGs) display inner and outer jets or lobes thought to result from intermittent accretion. Due to randomly triggered accretion events, the lifetime o…
Why Jet Power and Star Formation Are Uncorrelated in Active Galaxies
David Garofalo, Brent McDaniel, Max North
Jet luminosity from active galaxies and the rate of star formation have recently been found to be uncorrelated observationally. We show how to understand this in the context of a m…
Advanced life peaked billions of years ago according to black holes
David Garofalo
The link between black holes and star formation allows us to draw a connection between black holes and the places and times extraterrestrial intelligences (ETIs) had a greater chan…
Counter-rotating black holes from FRII lifetimes
David Garofalo
Estimates suggest that while FRII jets appear to have lifetimes constrained to hundreds of millions of years, radio galaxies with FRI jets appear to be longer lived. We illustrate…
M- relations across space and time
David Garofalo, Damian J. Christian, Chase Hames +4
Feedback from active galactic nuclei (AGN) has long been invoked to explain the correlation between black hole mass and stellar velocity dispersion (M-) discovered in low redshi…