Results 61 to 70 of about 52,369 (293)

Studies of Thermally Unstable Accretion Disks around Black Holes with Adaptive Pseudo-Spectral Domain Decomposition Method I. Limit-Cycle Behavior in the Case of Moderate Viscosity

, 2007
We present a numerical method for spatially 1.5-dimensional and time-dependent studies of accretion disks around black holes, that is originated from a combination of the standard pseudo-spectral method and the adaptive domain decomposition method ...
Honma F., Ju‐Fu Lu, Kawata A., Li Xue, Mayer M., Papaloizou J. C. B., Shakura N. I., Shuang‐Liang Li, Szuszkiewicz E.   +8 more
core   +1 more source

PASTA‐ELN: Simplifying Research Data Management for Experimental Materials Science

Advanced Engineering Materials, EarlyView.
Research data management faces ongoing hurdles as many ELNs remain complex and restrictive. PASTA‐ELN offers an open‐source, cross‐platform solution that prioritizes simplicity, offline access, and user control. Its in tuitive folder structure, modular Python add‐ons, and open formats enable seamless documentation, FAIR data practices, and easy ...
S. Brinckmann, G. Winkens, R. Schwaiger
wiley   +1 more source

Inherent Self-consistency of the Electron Fraction between Neutrino-dominated Accretion Flows and Their Progenitors

The Astrophysical Journal
Stellar-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

Double-hump spectrum, pulse profile dip, and pulsed fraction spectra from the low-accretion regime in the X-ray pulsar MAXI J0655-013

Astronomy & Astrophysics
Context. 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., Pike S. N., D’Aì A., Israel G. L., Ducci L., Rothschild R. E., Stella L., Amato R., Ambrosi E., Coley J. B., Fürst F., Imbrogno M., Kretschmar P., Maniadakis D. K., Papitto A., Pradhan P., Rouco Escorial A., Simongini A., Stierhof J., West B. F., Zalot N.   +20 more
doaj   +1 more source

Disk Weather

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
doaj   +1 more source

Wind-accretion disks in wide binaries, second generation protoplanetary disks and accretion onto white dwarfs

, 2012
Mass transfer from an evolved donor star to its binary companion is a standard feature of stellar evolution in binaries. In wide binaries, the companion star captures some of the mass ejected in a wind by the primary star.
Alexander, Andrews, Arnett, Bath, Bath, Bath, Bildsten, Bromley, Busso, Cannizzo, Chambers, Chiang, D'Alessio, de Val-Borro, Duquennoy, Hagai B. Perets, Han, Ireland, Kenyon, Livio, Lynden-Bell, Mastrodemos, Mikolajewska, Noebauer, Perets, Scott J. Kenyon, Shen, Soker, Sokoloski, Waldman, Wang   +30 more
core   +1 more source

A Dusty Disk Around WD1150-153: Explaining the Metals in White Dwarfs by Accretion from the Interstellar Medium versus Debris Disks [PDF]

, 2007
We report the discovery of excess K-band radiation from a metal-rich DAV white dwarf star, WD1150-153. Our near infrared spectroscopic observations show that the excess radiation cannot be explained by a (sub)stellar companion, and is likely to be caused
Bradley P. A., Kilkenny D., Mukremin Kilic, Seth Redfield, Weidemann V., Wood B. E.   +5 more
core   +4 more sources

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, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

Luminosity of accretion disks around rotating regular black holes

European Physical Journal C: Particles and Fields
We study thin accretion disks in the gravitational field of a class of rotating regular black holes. Our objective is to determine the key parameters governing these accretion disks: the radius of the innermost stable circular orbit $$(r_{\textrm{ISCO}})$
Kuantay Boshkayev, Talgar Konysbayev, Yergali Kurmanov, Orlando Luongo, Marco Muccino, Aliya Taukenova, Ainur Urazalina   +6 more
doaj   +1 more source

Accretion disk coronae

The Astrophysical Journal, 1982
Recent observations of partial X-ray eclipses from 4U1822-37 have shown that the central X-ray source in this system is diffused by a large Compton-thick accretion disk corona (ADC). Another binary, 4U2129-47, also displays a partial eclipse and contains an ADC. The possible origin of an ADC is discussed and a simple hydrostatic evaporated ADC model is
N. E. White, S. S. Holt
openaire   +1 more source