Results 1 to 10 of about 720 (206)
Relativistic Bondi accretion for stiff equations of state [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We revisit Bondi accretion – steady-state, adiabatic, spherical gas flow on to a Schwarzschild black hole at rest in an asymptotically homogeneous medium – for stiff polytropic equations of state (EOSs) with adiabatic indices Γ > 5/3.
Thomas W Baumgarte +2 more
exaly +6 more sources
Bridging Scales in Black Hole Accretion and Feedback: Magnetized Bondi Accretion in 3D GRMHD
Astrophysical Journal Letters, 2023 Fueling and feedback couple supermassive black holes (SMBHs) to their host galaxies across many orders of magnitude in spatial and temporal scales, making this problem notoriously challenging to simulate. We use a multi-zone computational method based on
Ramesh Narayan +2 more
exaly +2 more sources
Hot Accretion onto Black Holes with Outflow [PDF]
EPJ Web of Conferences, 2018 Classic Bondi accretion flow can be generalized to rotating viscous accretion flow. Study of hot accretion flow onto black holes show that its physical charateristics change from Bondi-like for small gas angular momentum to disk-like for Keperian gas ...
Park Myeong-Gu, Han Du-Hwan
doaj +2 more sources
An Analytical Theory for the Growth from Planetesimals to Planets by Polydisperse Pebble Accretion
The Astrophysical Journal, 2023 Pebble accretion is recognized as a significant accelerator of planet formation. Yet only formulae for single-sized (monodisperse) distribution have been derived in the literature.
Wladimir Lyra +3 more
doaj +2 more sources
X-ray cavities in the G50 bright group-centered galaxy NGC 5846 [PDF]
Serbian Astronomical Journal, 2021 We present results based on analysis of the currently available 29.86 ks Chandra data on the Bright Group-Centered Galaxy (BGG) NGC 5846 of G50 group.
Kyadampure Anil +2 more
doaj +1 more source
A New Hydrodynamic Spherical Accretion Exact Solution and Its Quasi-spherical Perturbations
The Astrophysical Journal, 2023 We present an exact γ = 5/3 spherical accretion solution that modifies the Bondi boundary condition of $\rho \to \mathrm{constant}$ as r → ∞ to ρ → 0 as r → ∞.
X. Hernandez, L. Nasser, A. Aguayo-Ortiz
doaj +1 more source
Brown dwarf accretion: Nonconventional star formation over very long timescales [PDF]
Serbian Astronomical Journal, 2005 We investigate the process of accretion of interstellar gas by the Galactic population of brown dwarfs over very long timescales typical for physical eschatology.
Ćirković Milan M.
doaj +1 more source
Toward Horizon-scale Accretion onto Supermassive Black Holes in Elliptical Galaxies
The Astrophysical Journal, 2023 We present high-resolution, three-dimensional hydrodynamic simulations of the fueling of supermassive black holes in elliptical galaxies from a turbulent medium on galactic scales, taking M87* as a typical case.
Minghao Guo +3 more
doaj +1 more source
How Ram Pressure Drives Radial Gas Motions in the Surviving Disk
The Astrophysical Journal, 2023 Galaxy evolution can be dramatically affected by the environment, especially by the dense environment of a galaxy cluster. Recent observational studies show that massive galaxies undergoing strong ram-pressure stripping (RPS) have an enhanced frequency ...
Nina Akerman +4 more
doaj +1 more source
The Astrophysical Journal, 2023 We investigate the effect of conductive heating of the gas surrounding a geometrically thick accretion disk on the growth of a black hole (BH) at high redshift.
Norita Kawanaka, Kazunori Kohri
doaj +1 more source