Can black holes light up the high redshift Universe?
…and as a follow up, could they be a candidate for dark matter?
How to Hide a Black Hole in a Hot Dog
Hot DOGs in space are more exciting than they sound. Let’s dissect the brightest one to learn how they hide black holes and some of the most extreme conditions in the universe.
Does Feedback Support Massive Black Hole Growth in Dwarf Galaxies?
How does one prevent a black hole from growing in a tiny galaxy? Today’s authors investigate two potential mechanisms!
Twinkle, twinkle, little quasar! Can you tell me how far away you are?
When we don’t have spectra, we can estimate the distance to a quasar by calculating its photometric redshift. Today’s authors present a new way to use the ‘flickering’ of quasars to improve these distance estimates.
A Black Hole Egg that Forgot to Hatch
Giant black holes may have hatched from cosmic eggs. What happens when we find one on our doorstep?
Quasars at Work: My photons come from a land where the accretion disks glow and the X-ray coronas plunder (energy from the disk)
In this exciting new paper, our authors show that in quasars, X-ray coronas fueled by energy stolen from the accretion disk around the black hole may be responsible for the interesting ultraviolet and optical emission we see!