Results 41 to 50 of about 720 (206)

Fluid accretion onto a spherical black hole: Relativistic description versus the Bondi model [PDF]

, 1999
We describe general relativistically a spherically symmetric stationary fluid accretion onto a black hole. Relativistic effects enhance mass accretion, in comparison to the Bondi model predictions, in the case when back reaction is neglected.
Malec, Edward
core   +1 more source

Relativistic Bondi-Hoyle-Lyttleton accretion: A parametric study [PDF]

Astronomy & Astrophysics, 2015
Aims. We investigate Bondi-Hoyle-Lyttleton accretion onto a black hole for ultra-relativistic flows, and how flow features are affected by density perturbations, upstream fluid velocity, and black hole spin.Methods. We use high-resolution shock-capturing (HRSC) schemes solved on curvilinear overlapping grids as demonstrated in a previous publication ...
Blakely, PM, Nikiforakis, N
openaire   +2 more sources

Numerical Simulation of Hot Accretion Flow around Bondi Radius

, 2022
Previous numerical simulations have shown that strong winds can be produced in the hot accretion flows around black holes. Most of those studies focus only on the region close to the central black hole, therefore it is unclear whether the wind production
Hai, Yang, Cemeljic, Miljenko, Bu, De-Fu, Zeraatgari, Fatemeh Zahra, Mosallanezhad, Amin, Mei, Liquan   +5 more
core  

Isothermal Bondi Accretion in Two-component Jaffe Galaxies with a Central Black Hole [PDF]

, 2018
The fully analytical solution for isothermal Bondi accretion onto a black hole (MBH) at the center of two-component Jaffe galaxy models is presented. In a previous work, we provided the analytical expressions for the critical accretion parameter and the ...
Ciotti, Luca, Pellegrini, Silvia
core   +1 more source

Scientists’ warning on the global destruction of rock outcrop ecosystems

Conservation Biology, EarlyView.
Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula, Lucas N. Perillo, Gianluigi Ottaviani, Flávio F. Carmo, Mandar N. Datar, Katherine C. Enebeli‐Ekwutoziam, Bruno Fogliani, Stephen D. Hopper, Aboli Kulkarni, Hans Lambers, Rafael F. Magalhães, Frederico S. Neves, Jean‐François Ponge, Stefan Porembski, Bruno H. P. Rosado, Fernando M. G. Santos, Elycée Tindano, Bram Vanschoenwinkel, Aparna Watve, Fernando A. O. Silveira   +19 more
wiley   +1 more source

Fully analytical solutions for Bondi accretion in galaxies with a central Black Hole

, 2020
The fully analytical solution for isothermal Bondi accretion on a black hole (MBH) at the center of JJ two-component Jaffe (1983) galaxy models is ...
Pellegrini S., Ciotti L.
core   +1 more source

Expression characteristics of dual‐specificity phosphatase 2 and hypoxia‐inducible factor‐1α in acute kidney injury and preliminary study of the effect of dual‐specificity phosphatase 2 on HK‐2 cells

Experimental Physiology, EarlyView.
ABSTRACT Acute kidney injury (AKI) is a global health problem with significant long‐term harm if the prognosis is poor. Dual‐specificity phosphatase 2 (DUSP2) is involved in key regulatory pathways in several disease processes, but its function in renal pathophysiology is unclear.
Xueqian Chu, Songmin Xue, Lanyan Lin, Xuan Huang, Sisi Chen, Wulaer Adeli, Zulibiya Tuohetiyaer, Suhua Li, Chen Lu   +8 more
wiley   +1 more source

Radiative cooling effects on black hole hot accretion flows around the sub-Bondi radius

Astronomy & Astrophysics
Aims. It is difficult to implement numerical simulations on a region extending from the vicinity of a black hole to the Bondi radius. Most previous numerical simulations have primarily concentrated on the region close to the black hole.
Liu Mu-Qing, Yang Xiao-Hong, Bu De-Fu
doaj   +1 more source

Myths and methodologies: Exposure and measurements under normobaric hypoxia

Experimental Physiology, EarlyView.
Abstract Usually, settings of normobaric hypoxia underestimate the environmental hypoxia they are supposed to reproduce. The likely steady state of water vapour pressure within the human airways keeps the partial pressure of inspired oxygen very close to the assumed value, but this does not apply to the calculation of environmental hypoxia or ...
Danilo Bondi
wiley   +1 more source

Isothermal Bondi Accretion in Jaffe and Hernquist Galaxies with a Central Black Hole: Fully Analytical Solutions

, 2017
One of the most active fields of research of modern-day astrophysics is that of massive black hole formation and coevolution with the host galaxy.
L. Ciotti, Silvia Pellegrini, S. Pellegrini, Luca Ciotti   +3 more
core   +1 more source