Results 61 to 70 of about 97,661 (176)

Numerical simulations of rotating bondi accretion flows

, 2015
We explore through numerical simulations the structure formed around a black hole as a consequence of supersonic Bondi accretion with a small, finite angular momentum. The structure accompanies an accretion shock, inside which the flow is subsonic and is
Lee, SJ, Ryu, Dongsu
core  

Xanthatin‐13‐(Pyrrolidine‐2‐Carboxylic Acid), a Sesquiterpene Lactone Isolated From Burdock Leaf, Attenuated Aβ25‐35 Toxicity and Memory Deficits in a Pharmacological Mouse Model of Alzheimer's Disease

Phytotherapy Research, Volume 40, Issue 5, Page 2824-2843, May 2026.
ABSTRACT Alzheimer's disease (AD) is a severe form of dementia, which occurrence increases with age and lifestyle conditions. It is characterized by amyloid protein accumulation forming senile plaques, hyperphosphorylated tau protein forming neurofibrillary tangles, neuroinflammation, and oxidative stress, leading to synapse loss and cell death ...
Charlyne Barry‐Simonnet, Lucie Crouzier, Tristan Moujellil‐Legagneur, Hamza Chaieb‐Errass, Yanis A. Idres, Karine Ferrare, Marc Rolland, Guillaume Cazals, Patrick Poucheret, Tangui Maurice, Didier Tousch   +10 more
wiley   +1 more source

Shaped by context: Evolutionary trajectories of desiccation tolerance in land plants

American Journal of Botany, Volume 113, Issue 4, April 2026.
Abstract Desiccation tolerance (DT), the ability to survive near‐complete cellular dehydration, is widespread in diaspores but rare in the vegetative tissues of land plants. The patchy and punctuated phylogenetic distribution of vegetative desiccation tolerance (VDT) suggests that the trait is both ancient and recurrent, yet the evolutionary ...
Rose A. Marks, R. Shawn Abrahams, Jenna T. B. Ekwealor   +2 more
wiley   +1 more source

Old pre-main-sequence stars - disc reformation by Bondi-Hoyle accretion [PDF]

, 2014
Young stars show evidence of accretion discs which evolve quickly and disperse with an e-folding time of ~3 Myr. This is in striking contrast with recent observations that suggest evidence of numerous >30 Myr old stars with an accretion disc in large ...
Scicluna, P., Scicluna, P, Dale, J. E., Testi, L, Testi, L., Dale, James, J. E. Dale, Rosotti, G., Rosotti, G, Dale, J., G. Rosotti, L. Testi, P. Scicluna, Dale, JE   +13 more
core   +1 more source

Influence of Runoff Generation Mechanisms on Dissolved and Particulate Phosphorus Loss From Grassland Soil

Soil Use and Management, Volume 42, Issue 2, April‐June 2026.
ABSTRACT Runoff of phosphorus (P) from agricultural fields is a leading contributor to impairment of freshwater quality. The influence of soil structure, and of mechanisms of runoff generation on forms of P losses is not fully understood. This study investigated P mobilisation from grassland soils in a controlled laboratory rainfall simulation.
Patricia Roche, Mary Harty, John Cleary, Samuel Browett, Shane Scannell, Mani Rezaee, John O'Sullivan, Sara Vero   +7 more
wiley   +1 more source

Self-limited Accretion onto Embedded Binaries in a Uniform Medium

The Astrophysical Journal
We study accretion from a uniform gas at rest onto equal-mass binaries—the binary Bondi problem—as a function of the adiabatic index  γ and compactness ξ  ≡  R _B / a , where R _B is the Bondi radius of the binary and a is the component separation.
Marcus DuPont, Eliot Quataert
doaj   +1 more source

Bondi accretion for adiabatic flows onto a massive black hole with an accretion disc

, 2019
We present the classical Bondi accretion theory for the case of non-isothermal accretion processes onto a supermassive black hole (SMBH), including the effects of X-ray heating and the radiation force due to electron scattering and spectral lines.
J. Klapp, E. Contreras, J. M. Ramírez-Velásquez, R. Gabbasov, L. Di G. Sigalotti   +4 more
core   +1 more source

Protoplanetary Disks from Pre-Main Sequence Bondi-Hoyle Accretion [PDF]

Protoplanetary disks are routinely described as finite mass reservoirs left over by the gravitational collapse of the protostar, an assumption that strongly constrains both disk evolution and planet formation models. We propose a different scenario where
Haugboelle, Troels, Pelkonen, Veli-Matti, Padoan, Paolo, Pan, Liubin, Nordlund, AAke   +4 more
core   +1 more source

Accretion-modified Stars in Accretion Disks of Active Galactic Nuclei: Observational Characteristics in Different Regions of the Disks

The Astrophysical Journal
Stars and compact objects embedded in accretion disks of active galactic nuclei (AGNs), dubbed accretion-modified stars (AMSs), often experience hyper-Eddington accretion in the dense gas environment, resulting in powerful outflows as the Bondi explosion
Jun-Rong Liu, Yi-Lin Wang, Jian-Min Wang
doaj   +1 more source

Accretion and Nuclear Activity of Quiescent Supermassive Black Holes. II. Optical Study and Interpretation [PDF]

, 2006
Our X-ray study of the nuclear activity in a new sample of six quiescent early-type galaxies, as well as in a larger sample from the literature, confirmed (Paper I) that the Bondi accretion rate of diffuse hot gas is not a good indicator of the SMBH X ...
G. Fabbiano, Siemiginowska, A., Soria, R, PELLEGRINI, SILVIA, Graham, AW, A. Siemiginowska, Fabbiano, G, Fabbiano, G., Jerjen, H., Elvis, M., A. Graham, M. Elvis, Elvis, M, A. Baldi, Baldi, A., Pellegrini, S., Jerjen, H, Soria, Roberto, Graham, A., R. Soria, Siemiginowska, A, Baldi, A, H. Jerjen, Pellegrini, S   +23 more
core   +1 more source