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Faint-end Quasar Luminosity Functions from Cosmological Hydrodynamic Simulations
Colin DeGraf, Tiziana Di Matteo, Volker Springel
We investigate the predictions for the faint-end quasar luminosity function (QLF) and its evolution using fully cosmological hydrodynamic simulations which self-consistently follow…
Lyalpha versus X-ray heating in the high-z IGM
Benedetta Ciardi, Ruben Salvaterra, Tiziana Di Matteo
In this paper we examine the effect of X-ray and Lyalpha photons on the intergalactic medium temperature. We calculate the photon production from a population of stars and micro-qu…
Hydrogen Self Shielding in a Quasar Proximity Zone
Gabriel Altay, Rupert A. C. Croft, Tiziana Di Matteo
We calculate the distribution of HI within 750 proper kpc/h of a quasar, Lbol = 1.62e13 Lsun, powered by an SMBH, Mbh = 4.47e8 Msun, at z = 3. Our numerical model includes a cosmol…
Nested hierarchies in planar graphs
Won-Min Song, T. Di Matteo, Tomaso Aste
We construct a partial order relation which acts on the set of 3-cliques of a maximal planar graph G and defines a unique hierarchy. We demonstrate that G is the union of a set of…