Results 61 to 70 of about 1,814 (268)
Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A
Advanced Engineering Materials, EarlyView.The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han +5 more
wiley +1 more source
The Astrophysical JournalStellar-mass black holes (BHs) surrounded by neutrino-dominated accretion flows (NDAFs) are a leading central engine of gamma-ray bursts (GRBs). In this work, we investigate the electron fraction distribution in NDAFs with or without disk outflows for ...
Rui-Qi Cui, Tong Liu
doaj +1 more source
Astronomy & AstrophysicsContext. Accreting X-ray pulsars (XRPs) undergo different physical regimes depending on different mass accretion rates, with related changes in the emitted X-ray spectral properties.
Malacaria C. +20 more
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Direct URCA Processes in Supernovae and Accretion Disks with Arbitrary Magnetic Field
EPJ Web of Conferences, 2017 An effect of a magnetic field of an arbitrary strength on the beta-decay and reactions related with it by the crossing symmetry (the beta-processes) in supernovae and accretion disks around black holes is analyzed.
Ognev Igor
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On the Computation of Accretion Disk Spectra [PDF]
Astrophysics and Space Science, 1987 AbstractSpectra of accretion disks in dwarf novae and some novalike stars have been computed. Many simplifications to the general model of the nature of a cataclysmic variable are needed to make the system numerically tractable. The necessity, justification, and implications of such simplifications are discussed together with the influences of some ...
openaire +1 more source
THE COSMIC BATTERY IN ASTROPHYSICAL ACCRETION DISKS [PDF]
The Astrophysical Journal, 2015 The aberrated radiation pressure at the inner edge of the accretion disk around an astrophysical black hole imparts a relative azimuthal velocity on the electrons with respect to the ions which gives rise to a ring electric current that generates large scale poloidal magnetic field loops.
Ioannis Contopoulos +2 more
openaire +3 more sources
Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites
Advanced Engineering Materials, EarlyView.Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter +9 more
wiley +1 more source
Understanding Balmer Decrements in T Tauri Stars in Terms of Multiflow Magnetospheric Accretion
The Astrophysical JournalMagnetospheric accretion is the paradigm for accretion in classical T Tauri stars (CTTSs). However, the standard, one-flow magnetospheric accretion model fails to replicate important characteristics such as the observed Balmer decrements. We address this
Naiara Patiño +6 more
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EPJ Web of Conferences, 2013 Recent years have shown that accretion disks around young stars have extended regions, which are too low ionized to couple to magnetic fields and thus the nature of the underlying turbulence cannot be exclusively magnetic. We also found that disks have
Lyra Wlad, Raettig Natalie, Klahr Hubert
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Numerical models of accretion disks [PDF]
AIP Conference Proceedings, 1998 I review recent numerical studies of accretion disks, focusing on measurements of the turbulent shear stress, or $α$, in the shearing box model. I conclude with a list of astronomically relevant open questions that can be settled via future numerical experiments.
openaire +2 more sources