172 citations · 343 across the 26 of their papers we have counts for
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Extreme Kerr Newman Black Holes: Differential Geometry, Symmetry, and the Golden Ratio
Remo Ruffini, Giorgio Sonnino
We investigate the geometry of extreme Kerr-Newman black holes and its role in selecting distinct black hole states. Motivated by Smarr's question of what physical information is e…
Irreducible-Mass Balance for Magnetized Null Horizons with an Internal Current Sheet
Remo Ruffini, Giorgio Sonnino
We begin with a general question: how does the irreducible mass of a magnetized black hole change when the horizon is not stationary? The null Raychaudhuri equation gives an exact…
Irreducible-Mass Growth and Extractable Energy in a Self-Gravitating Blandford-Znajek Engine
Remo Ruffini, Giorgio Sonnino
Wang recently constructed a self-gravitating split-monopole Blandford-Znajek engine and obtained its secular horizon mass and angular-momentum loss rates. We determine the previous…
Growth of High-Redshift Quasars from Fermion Dark Matter Seeds
Yu Wang, Remo Ruffini
Quasars hosting black holes at challenge growth scenarios that start from light seeds and assume accretion within already formed galaxies. Motivated…
Islands of Electromagnetic Tranquility in Our Galactic core and Little Red Dots that Shelter Molecules and Prebiotic Chemistry
Remo Ruffini, Yu Wang
Both the Galactic Center and little red dots (LRDs) host million-solar-mass black holes within dense, cold reservoirs of molecules associated with dust grains, and are electromagne…
Dark Matter Massive Fermions and Einasto Profiles in Galactic Haloes
I. Siutsou, C. R. Argüelles, R. Ruffini
On the basis of a fermionic dark matter model we fit rotation curves of The HI Nearby Galaxy Survey THINGS sample and compare our 3-parametric model to other models widely used in…