Results 61 to 70 of about 35,614 (300)

Cold Dark Matter Substructure and Galactic Disks I: Morphological Signatures of Hierarchical Satellite Accretion [PDF]

, 2007
(Abridged) We conduct a series of high-resolution, dissipationless N-body simulations to investigate the cumulative effect of substructure mergers onto thin disk galaxies in the context of the LCDM paradigm of structure formation. Our simulation campaign
Bullock, James S., Kazantzidis, Stelios, Kravtsov, Andrey V., Moustakas, Leonidas A., Zentner, Andrew R.   +4 more
core   +3 more sources

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Stellar Evolution with Radiative Feedback in AGN Disks

The Astrophysical Journal
Stars embedded in the inner parsec region of an active galactic nucleus (AGN) experience extreme accretion conditions that significantly alter their evolution.
Zheng-Hao Xu, Yi-Xian Chen, Douglas N. C. Lin   +2 more
doaj   +1 more source

Impact of the Accretion Disk Thickness on the Polarization of the Thermal Emission from Stellar Mass Black Holes

The Astrophysical Journal, 2023
The Imaging X-ray Polarimetry Explorer, launched in 2021 December, enables precision measurements of the energy-dependent polarization of the X-ray emission from stellar mass and supermassive black holes.
Andrew Thomas West, Henric Krawczynski
doaj   +1 more source

Structural and compositional properties of brown dwarf disks: the case of 2MASS J04442713+2512164 [PDF]

, 2008
In order to improve our understanding of substellar formation, we have performed a compositional and structural study of a brown dwarf disk. We present the result of photometric, spectroscopic and imaging observations of 2MASS J04442713+2512164, a ...
A. Bayo, Alencar, Apai, Appenzeller, B. Lefort, Baraffe, Barrado y Navascués, Basri, Bockelée-Morvan, Bouwman, C. Pinte, Cabrit, Calvet, Chiang, Ciesla, Comerón, D. Barrado y Navascués, Devillard, Dorschner, Dullemond, E. L. Martín, E. Pantin, F. Marchis, F. Ménard, Fernández, Fernández, G. Basri, G. Duchêne, G. Duvert, Gail, Garcia Lopez, Guieu, H. Bouy, Harker, Harker, Hartmann, Houck, J. Olofsson, J.-C. Augereau, J.-L. Monin, Kaito, Keller, Keller, Kemper, Kessler-Silacci, Kessler-Silacci, Knapp, Lagage, Lay, Luhman, Luhman, Luhman, Martín, Meeus, Merín, Mohanty, Molster, Muzerolle, Muzerolle, Muzerolle, N. Huélamo, Natta, Nuth, Ochsenbein, Pantin, Pinte, Pinte, S. Bottinelli, S. Guieu, Sargent, Scholz, Tozzi, van Boekel, van Boekel, Vogt, Walker, Whelan, White   +77 more
core   +4 more sources

Impact of Sustainable Binders Based on Lignin and Collagen on the Volume Stability and Mechanical Properties of MgO‐C Refractories with MgO‐C Recyclates

Advanced Engineering Materials, EarlyView.
Collagen hydrolysate is evaluated as a sustainable binder for MgO‐C refractories. Its thermally induced cross‐linking and gas release lead to expansion and cracking in large bricks, but tailored batches with lignin, recyclates, or fine graphite improve the gas release while thermal treatment and stability.
Till M. J. Stadtmüller, Florian Kerber, Kirsten Moritz, Steffen Dudczig, Konstantin Kraushaar, Thomas Schemmel, Jana Hubálková, Patrick Gehre, Christos G. Aneziris   +8 more
wiley   +1 more source

A Semi-analytical Model for Stellar Evolution in AGN Disks

The Astrophysical Journal
Disks of gas accreting onto supermassive black holes may host numerous stellar-mass objects, formed within the disk or captured from a nuclear star cluster.
Alexander J. Dittmann, Matteo Cantiello
doaj   +1 more source

Mass Accretion Processes in Young Stellar Objects: Role of Intense Flaring Activity

Acta Polytechnica CTU Proceedings, 2014
According to the magnetospheric accretion scenario, young low-mass stars are surrounded by circumstellar disks which they interact with through accretion of mass. The accretion builds up the star to its nal mass and is also believed to power the mass out
Salvatore Orlando, Fabio Reale, Giovanni Peres, Andrea Mignone   +3 more
doaj   +1 more source

The Time Evolution of in Protoplanetary Disks as a Way to Disentangle between Viscosity and MHD Winds

The Astrophysical Journal Letters, 2023
As the classic viscous paradigm for protoplanetary disk accretion is challenged by the observational evidence of low turbulence, the alternative scenario of MHD disk winds is being explored as being potentially able to reproduce the same observed ...
Alice Somigliana, Leonardo Testi, Giovanni Rosotti, Claudia Toci, Giuseppe Lodato, Benoît Tabone, Carlo F. Manara, Marco Tazzari   +7 more
doaj   +1 more source

The viscous evolution of circumstellar discs in young star clusters

, 2018
Stars with circumstellar disks may form in environments with high stellar and gas densities which affects the disks through processes like truncation from dynamical encounters, ram pressure stripping, and external photoevaporation.
Concha-Ramírez, Francisca, Vaher, Eero, Zwart, Simon Portegies   +2 more
core   +1 more source