Results 131 to 140 of about 323,430 (318)

Electron Heating in the Transrelativistic Perpendicular Shocks of Tilted Accretion Flows

The Astrophysical Journal
General relativistic magnetohydrodynamic (GRMHD) simulations of black hole tilted disks—where the angular momentum of the accretion flow at large distances is misaligned with respect to the black hole spin—commonly display standing shocks within a few to
Lorenzo Sironi, Aaron Tran
doaj   +1 more source

Magnetically Driven Warping and Precession of Accretion Disks: Implications for Exotic Stellar Variabilities [PDF]

International Astronomical Union Colloquium, 2002
AbstractThe inner region of the accretion disk around a magnetized star is subjected to magnetic torques that induce warping and precession of the disk. These torques arise from interactions between the stellar field and the induced electric currents in the disk.
openaire   +2 more sources

An Integrated Oxygen‐Supplying Device and Predictive Multiphysics Model for Extended Ambient Transport of Insulin‐Producing Cells

Advanced Functional Materials, EarlyView.
Cell therapies typically rely on cold‐chain logistics and cryopreservation, limiting access and compromising cell quality. Here, a dual‐chamber device separates an oxygen‐supplying chamber from a hyaluronic acid cargo chamber, sustaining oxygen delivery for over 70 h and enabling ambient‐temperature shipment.
Daniel A. Domingo‐Lopez, Ruth Tarpey, Benjamin Brennan, Bryan D. Boyle, Amir M. Alsharabasy, Abhik Mallick, Gabriella Bellavia, Abhay Pandit, Garry P. Duffy, Ruth E. Levey   +9 more
wiley   +1 more source

The role of neutrinos in explosive nucleosynthesis in core collapse supernova models with neutrino transport [PDF]

, 2007
The problem of core collapse supernova explosions is long standing and attempts to understand the mechanism have been ongoing. On one hand, a full understanding of the underlying mechanism is still pending.
Fröhlich, Carla
core   +1 more source

Spectral Appearance of Self-gravitating Disks Powered by Stellar Objects: Universal Effective Temperature in the Optical Continuum and Application to Little Red Dots

The Astrophysical Journal Letters
We revisit the spectral appearance of extended self-gravitating accretion disks surrounding compact central objects such as supermassive black holes. Using dust-poor opacities, we show that all optically thick disk solutions possess a universal outer ...
Yi-Xian Chen, Hanpu Liu, Ruancun Li, Bingjie Wang, Yilun Ma, Yan-Fei Jiang, Jenny E. Greene, Eliot Quataert, Jeremy Goodman   +8 more
doaj   +1 more source

Electron‐Deficient Linkers Enhance H2O2 Electrosynthesis in Covalent Organic Frameworks

Advanced Functional Materials, EarlyView.
Linker π‐conjugation modulates the electronic state of the Ni–N4 centers and their interaction with the key *OOH intermediate while preserving the primary coordination motif. NiPc‐PTDA delivers an H2O2 selectivity of 92% and a production rate of 34.8 mol gcat−1 h−1, highlighting linker electronic properties as a molecular design parameter for NiPc ...
Houting Xie, Rui Guo, Zhen Liu, Yang Hu, Laichun Zhao, Omid Mazaheri, Bufeng Zhang, Shuaijun Pan   +7 more
wiley   +1 more source

The Pre-outburst Properties of the FU Ori Object HBC 722

The Astrophysical Journal Letters
FU Ori outbursts are thought to play an important role in stellar assembly and the evolution of protoplanetary disks. However, the progenitor young stellar objects are largely uncharacterized.
Gregory J. Herczeg, Bo Reipurth
doaj   +1 more source

Mhd waves in stellar winds and accretion disks

, 2000
"Alfv?en waves have been used to explain the heating of stellar coronae andthe production of stellar winds in many regions of the Hertzsprung-Russell (HR)diagram. The waves were used as a major acceleration mechanism in the wind ofprotostars, late-type stars, early-type stars and in the solar wind.
M. J. Vasconcelos, V. Jatenco Pereira, R. Opher   +2 more
openaire   +1 more source

The Effects of Accretion Feedback on Stellar Evolution in AGN Disks

Stars embedded in the accretion disks of active galactic nuclei (AGN) can accrete rapidly from their surroundings, dramatically altering their structure and evolution. However, feedback from the release of gravitational potential energy and radiative enthalpy by accreting gas can limit accretion rates, as recently demonstrated in radiation ...
Dittmann, Alexander J., Cantiello, Matteo   +1 more
openaire   +2 more sources

Charting Morphotoxicity With Complementary Embryo Models

Advanced Healthcare Materials, EarlyView.
Three human embryo models of the peri‐implantation stages are exposed to a library of compounds. The (toxic) effects of the compounds are analyzed through automated image analysis pipelines. By evaluating the differential responses of the embryo models, this study underscores the importance of testing complementary embryo models to achieve robust and ...
Dorian G. Luijkx, Pauline L. Balder, Romy M. L. Verhagen, Vinidhra Shankar, Barry Jutten, Pinak Samal, Timo Rademakers, Clemens A. van Blitterswijk, Stefan Giselbrecht, Erik J. Vrij   +9 more
wiley   +1 more source