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!
The effects of gas are complicated and challenging to simulate. Today’s paper explores a way to account for gas in cosmological simulations without actually including it!
As though cooking up models of the early universe that produce an interesting number of primordial black holes wasn’t hard enough, now we’ve got quantum effects to worry about too. Today’s authors quantify how careful we need to be with models of ultra-slow-roll inflation in order to predict the correct number of primordial black holes that could be around today.
Using the WMAP power spectrum together with weak lensing data from the Atacama Cosmology Telescope, the authors of this paper show that a cosmological model including a dark energy component is required to fit the Cosmic Microwave Background data.