16 papers
Radiation GRMHD Models of Accretion onto Stellar-Mass Black Holes: II. Super-Eddington Accretion
Lizhong Zhang, James M. Stone, Christopher J. White +3
We present a comprehensive analysis of super-Eddington black hole accretion simulations that solve the GRMHD equations coupled with angle-discretized radiation transport. The simul…
The Balmer Break and Optical Continuum of Little Red Dots from Super-Eddington Accretion
Hanpu Liu, Yan-Fei Jiang, Eliot Quataert +2
The physical origin of Little Red Dots (LRDs)--compact extragalactic sources with red rest-optical continua and broad Balmer lines--remains elusive. The redness of LRDs is likely i…
Radiation-magnetohydrodynamic Simulations of Accretion Flow Formation After a Tidal Disruption Event
Maria Renee Meza, Xiaoshan Huang, Shane W. Davis +1
We perform 3D radiation-magnetohydrodynamic simulations of the evolution of the fallback debris after a tidal disruption event. We focus on studying the effects of magnetic fields…
Fragmentation-limited dust filtration in 2D simulations of planet-disk systems with dust coagulation. Parameter study and implications for the inner disk's dust mass budget and composition
Thomas Pfeil, Philip J. Armitage, Yan-Fei Jiang
Super-thermal gas giant planets or their progenitor cores are known to open deep gaps in protoplanetary disks, which stop large, drifting dust particles on their way to the inner d…
Multi-band Emission from Star-Disk Collision and Implications for Quasi-Periodic Eruptions
Xiaoshan Huang, Itai Linial, Yan-Fei Jiang
We perform two-dimensional, multi-group radiation hydrodynamic simulations to explore the observational properties of a solar-like star colliding with an accretion disk around a su…
Do Little Red Dots Vary?
Amy Secunda, Rachel S. Somerville, Yan-Fei Jiang +3
Little red dots (LRDs), high-redshift, compact, red objects with V-shaped spectra, are one of the most exciting and perplexing discoveries made by the James Webb Space Telescope (J…