खोज परिणाम - Philip F. Hopkins
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1
Multi-Phase Thermal Structure & The Origin of the Broad-Line Region, Torus, and Corona in Magnetically-Dominated Accretion Disks
प्रकाशित 2025-05-01पूर्ण पाठ प्राप्त करेंRecent simulations have demonstrated the formation of 'flux-frozen' and hyper-magnetized disks, qualitatively distinct from both classical $\alpha$ disks and magnetically-arrested disks, as a natural consequence of fueling gas to supermassive black holes in galactic nuclei. We previously s...
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2
Cosmic Ray Feedback in Massive Halos: Implications for the Distribution of Baryons
प्रकाशित 2025-05-01पूर्ण पाठ प्राप्त करेंWe use order of magnitude estimates and observational constraints to argue that feedback from relativistic cosmic rays (CRs) produced by massive black holes is likely to have a particularly large effect at radii of order the virial radius and larger in group-mass halos. We show that for a range of p...
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Rapid, strongly magnetized accretion in the zero-net-vertical-flux shearing box
प्रकाशित 2025-04-01पूर्ण पाठ प्राप्त करेंWe show that there exist two qualitatively distinct turbulent states of the zero-net-vertical-flux shearing box. The first, which has been studied in detail previously, is characterized by a weakly magnetized ($\beta\sim50$) midplane with slow periodic reversals of the mean azimuthal field (dynamo...
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4
Zooming In On The Multi-Phase Structure of Magnetically-Dominated Quasar Disks: Radiation From Torus to ISCO Across Accretion Rates
प्रकाशित 2025-04-01पूर्ण पाठ प्राप्त करेंRecent radiation-thermochemical-magnetohydrodynamic simulations resolved formation of quasar accretion disks from cosmological scales down to ~300 gravitational radii $R_{g}$, arguing they were 'hyper-magnetized' (plasma $\beta\ll1$ supported by toroidal magnetic fields) and distinct from...
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