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Relevant bibliographies by topics / Accretion (Astrophysics) - Computer simulation

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Academic literature on the topic 'Accretion (Astrophysics) - Computer simulation'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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Journal articles on the topic "Accretion (Astrophysics) - Computer simulation"

1

Moscibrodzka, Monika A., Daniel Proga, Bożena Czerny, and Aneta Siemiginowska. "Radiation spectra from MHD simulations of low angular momentum flows." Proceedings of the International Astronomical Union 2, S238 (2006): 411–12. http://dx.doi.org/10.1017/s1743921307005704.

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AbstractWe perform Monte Carlo calculation to determine the radiation spectra from magnetized, low angular momentum accretion flow. Magneto-hydrodynamical simulation (with angular momentum parameter lambda of about 2 Rg c) was performed by Proga & Begelman 2003. Because simulation neglect radiative cooling, we compute electron temperature separately, including ohmic heating, parametrized with small δ coefficient, ion-electron coupling, radiative cooling and advection. Radiation spectra are obtained taking into account, thermal synchrotron and bremsstrahlung radiation, self absorption and C

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Bibossinov, Assylkhan, Denis Yurin, and Chingis Omarov. "Numerical Studies of Astrophysical Objects at Fesenkov Astrophysical Institute (FAI)." Communications of the Byurakan Astrophysical Observatory 2, no. 1 (2018): 124–34. http://dx.doi.org/10.52526/25792776-2018.2.1-124.

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Numerical studies of astrophysical objects are a relatively new direction in Fesenkov Astrophysical Institute (FAI) and is mainly represented by the Laboratory of Cosmology, Stellar Dynamics and Computational Astrophysics. The lab seeks to understand the evolution of gravitating systems at various scales – from star clusters to galaxies to large-scale structure of the universe as a whole, and tackles these problems both through analytical methods and through numerical simulations. The particular focus is on numerical simulations of star clusters, especially those found in active galactic nucle

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Schulik, M., A. Johansen, B. Bitsch, and E. Lega. "Global 3D radiation-hydrodynamic simulations of gas accretion: Opacity-dependent growth of Saturn-mass planets." Astronomy & Astrophysics 632 (December 2019): A118. http://dx.doi.org/10.1051/0004-6361/201935473.

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The full spatial structure and temporal evolution of the accretion flow into the envelopes of growing gas giants in their nascent discs is only accessible in simulations. Such simulations are constrained in their approach of computing the formation of gas giants by dimensionality, resolution, consideration of self-gravity, energy treatment and the adopted opacity law. Our study explores how a number of these parameters affect the measured accretion rate of a Saturn-mass planet. We present a global 3D radiative hydrodynamics framework using the FARGOCA-code. The planet is represented by a gravi

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Ohsugi, Y. "Bondi–Hoyle–Lyttleton accretion flow revisited: Numerical simulation of unstable flow." Astronomy and Computing 25 (October 2018): 44–51. http://dx.doi.org/10.1016/j.ascom.2018.08.005.

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Vallés-Pérez, David, Susana Planelles, and Vicent Quilis. "On the accretion history of galaxy clusters: temporal and spatial distribution." Monthly Notices of the Royal Astronomical Society 499, no. 2 (2020): 2303–18. http://dx.doi.org/10.1093/mnras/staa3035.

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ABSTRACT We analyse the results of an Eulerian adaptive mesh refinement cosmological simulation in order to quantify the mass growth of galaxy clusters, exploring the differences between dark matter and baryons. We have determined the mass assembly histories (MAHs) of each of the mass components and computed several proxies for the instantaneous mass accretion rate (MAR). The mass growth of both components is clearly dominated by the contribution of major mergers, but high MARs can also occur during smooth accretion periods. We explored the correlations between MARs, merger events, and cluster

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DONMEZ, ORHAN. "QUASI-PERIODIC OSCILLATIONS AND FREQUENCIES IN AN ACCRETION DISK AND COMPARISON WITH THE NUMERICAL RESULTS FROM NON-ROTATING BLACK HOLE COMPUTED BY THE GRH CODE." Modern Physics Letters A 22, no. 02 (2007): 141–57. http://dx.doi.org/10.1142/s021773230702138x.

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The shocked wave created on the accretion disk after different physical phenomena (accretion flows with pressure gradients, star-disk interaction etc.) may be responsible observed Quasi Periodic Oscillations (QPOs) in X-ray binaries. We present the set of characteristics frequencies associated with accretion disk around the rotating and non-rotating black holes for one particle case. These persistent frequencies are results of the rotating pattern in an accretion disk. We compare the frequency's from two different numerical results for fluid flow around the non-rotating black hole with one par

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Toscani, Martina, and Giuseppe Lodato. "On the likelihood of Gravitational Wave emission during the Tidal Disruption of stars by Super Massive Black Holes." Proceedings of the International Astronomical Union 14, S342 (2018): 275–77. http://dx.doi.org/10.1017/s174392131800368x.

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AbstractTidal Disruption Events (TDEs) are a common feature between Active and Quiescent Galactic Nuclei; the study of these events is a very useful tool to probe phenomena that relate to the formation of an accretion disc or a jet. Also, the accretion rate at the beginning of the tidal flare is expected to be significantly super-Eddington and might result in high energy emission (in soft X-rays but sometimes up to the gamma regime, as in the the case of Swift J1644, see Komossa 2015). These events may even play an important role in the newborn field of the Multimessenger Astronomy. This work

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Süli, Á. "Statistics of collision parameters computed from 2D simulations." Monthly Notices of the Royal Astronomical Society 503, no. 4 (2021): 4700–4718. http://dx.doi.org/10.1093/mnras/stab669.

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ABSTRACT There are two popular ways to speed up simulations of planet formation via increasing the collision probability: (i) confine motion to 2D, (ii) artificially enhance the physical radii of the bodies by an expansion factor. In this paper, I have performed 100 simulations each containing 104 interacting bodies and computed the collision parameters from the results of the runs. Each run was executed for a lower and a higher accuracy parameter. The main goal is to determine the probability distribution functions of the collision parameters and their dependence on the expansion factor. A si

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Čemeljić, M. "“Atlas” of numerical solutions for star-disk magnetospheric interaction." Astronomy & Astrophysics 624 (April 2019): A31. http://dx.doi.org/10.1051/0004-6361/201834580.

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Aims. I report results in numerical simulations of star-disk magnetospheric interaction. A thin accretion disk with a corona above a rotating stellar surface is simulated, and a parameter study is performed to find trends in the angular momentum flux. The results are presented for young stellar objects, but they can be rescaled to other objects with similar geometry. Methods. I performed resistive and viscous magnetohydrodynamic simulations that reached a quasi-stationary state for cases with different parameters. I computed angular momentum fluxes in the different components of the flow to co

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Stehlé, C., A. Ciardi, J. P. Colombier, et al. "Scaling stellar jets to the laboratory: The power of simulations." Laser and Particle Beams 27, no. 4 (2009): 709–17. http://dx.doi.org/10.1017/s0263034609990449.

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AbstractAdvances in laser and Z-pinch technology, coupled with the development of plasma diagnostics, and the availability of high-performance computers, have recently stimulated the growth of high-energy density laboratory astrophysics. In particular, a number of experiments have been designed to study radiative shocks and jets with the aim of shedding new light on physical processes linked to the ejection and accretion of mass by newly born stars. Although general scaling laws are powerful tools to link laboratory experiments with astrophysical plasmas, the phenomena modeled are often too co

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Dissertations / Theses on the topic "Accretion (Astrophysics) - Computer simulation"

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Tang, Wing-shun, and 鄧榮信. "Study of power spectrum fluctuation in accretion disc by cellular automaton." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31221695.

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Wing, Eliya. "Numerical simulation of ice accretion on 3-D rotor blades." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51833.

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Rotorcraft vehicles are highly sensitive to ice accretion. When ice forms on helicopter rotor blades, performance degradation ensues due to a loss of lift and rise in drag. The presence of ice increases torque, power required, and leads to rotor vibrations. Due to these undesirable changes in the vehicle's performance, the FAA requires intensive certification to determine the helicopter’s airworthiness in icing conditions. Since flight tests and icing tunnel tests are very expensive and cannot simulate all conditions required for certification, it is becoming necessary to use computational sol

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Foster, P. A. "The computer simulation of the gas dynamics in ring galaxy formation." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375065.

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Merk, Rainer. "Thermodynamics and accretion of asteroids, comets and kuiper belt objects a computer simulation study in planetary physics /." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971166404.

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Meru, Farzana Karim. "On the fragmentation of self-gravitating discs." Thesis, University of Exeter, 2010. http://hdl.handle.net/10036/117789.

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I have carried out three-dimensional numerical simulations of self-gravitating discs to determine under what circumstances they fragment to form bound clumps that may grow into giant planets. Through radiation hydrodynamical simulations using a Smoothed Particle Hydrodynamics code, I find that the disc opacity plays a vital role in determining whether a disc fragments. Specifically, opacities that are smaller than interstellar Rosseland mean values promote fragmentation (even at small radii, R < 25AU) since low opacities allow a disc to cool quickly. This may occur if a disc has a low metal

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Fu, Ping. "Modelling and simulation of the ice accretion process on fixed or rotating cylindrical objects by the boundary element method = Modélisation et simulation des accrétions de glace atmosphérique sur des objets cylindriques fixes et tournants par la méthode des éléments finis de frontière /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2004. http://theses.uqac.ca.

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Orieux, François. "Inversion bayésienne myope et non-supervisée pour l'imagerie sur-résolue. Application à l'instrument SPIRE de l'observatoire spatial Herschel." Phd thesis, Université Paris Sud - Paris XI, 2009. http://tel.archives-ouvertes.fr/tel-00433540.

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Les travaux concernent le traitement de données pour l'imagerie sur-résolue avec une application en astronomie. On s'intéresse en particulier aux données issues de l'instrument SPIRE de l'observatoire spatial Herschel de l'ESA, dédié aux infrarouges lointains. Les problèmes soulevés sont principalement : la réponse de l'optique qui atténue les fréquences spatiales, le sous-échantillonnage ainsi que la présence d'une dérive thermique. L'approche proposée est l'inversion de données, c'est à dire la prise en compte du processus d'acquisition en plus d'information a priori, pour estimer le ciel d'

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Smith, Heather. "Geometric Acoustic Modeling of the LDS Conference Center." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd591.pdf.

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Marty, Philippe. "Etalonnages de l'instrument EPIC du satellite XMM-NewtonObservations d'Amas de Galaxies en rayons-X." Phd thesis, Université Paris Sud - Paris XI, 2003. http://tel.archives-ouvertes.fr/tel-00141571.

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Le satellite XMM-Newton est la seconde grande mission du plan Horizon 2000 de l'Agence Spatiale Européenne, et a pour but d'ouvrir plus largement la fenêtre des rayons-X afin d'explorer la population de sources de hautes énergies tant de la Galaxie que du ciel profond.<br /><br />Dans la première partie, je dresse un portrait de l'astronomie contemporaine dans les hautes énergies, puis je résume le contexte, notamment celui de l'observation des grandes structures et des Amas de Galaxies, ayant mené au développement d'un observatoire spatial tel qu'XMM-Newton. Une description de ses télescopes,

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Sen, Bhaswar. "Computer simulation of the Rice University gamma ray telescope." Thesis, 1988. http://hdl.handle.net/1911/13316.

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Calculations have been made of the new Rice University gamma ray astronomical telescope, over the energy interval 0.1 MeV-5.0MeV. A computer program, ACCEPT, was used and simulations performed on the Rice University's AS-9000 mainframe. For gamma ray fluxes at 3.5 g cm$\sp{-2}$ atmospheric depth over Palestine, Texas, efficiency curves for the principal detector have been obtained. Energy deposition profiles have been calculated and compared to previous simulations and observations. The study shows the simulation code ACCEPT to be more machine dependent than previously believed.

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Books on the topic "Accretion (Astrophysics) - Computer simulation"

1

Danby, J. M. A. Astrophysics simulations. Wiley, 1995.

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Richard, Kouzes, Whitney Charles, and Consortium for Upper Level Physics Software., eds. Astrophysics simulations: The Consortium for Upper Level Physics Software. Wiley, 1995.

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Gruen, Armin. Calibration and Orientation of Cameras in Computer Vision. Springer Berlin Heidelberg, 2001.

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A, Clarke David, and West Michael J, eds. Computational astrophysics: Proceedings of the 12th Kingston Meeting on Theoretical Astrophysics held in Halifax, Nova Scotia, Canada, October 17-19, 1996. Astronomical Society of the Pacific, 1997.

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International Conference on Numerical Astrophysics (1998 Tokyo, Japan). Numerical astrophysics: Proceedings of the International Conference on Numerical Astrophysics 1998 (NAP98), held at the National Olympic Memorial Youth Center, Tokyo, Japan, March 10-13, 1998. Kluwer Academic Publishers, 1999.

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Lipatov, Alexander S. The Hybrid Multiscale Simulation Technology: An Introduction with Application to Astrophysical and Laboratory Plasmas. Springer Berlin Heidelberg, 2002.

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UNAM-CRAY Supercomputing Workshop, "Numerical Simulations in Astrophysics : Modelling the Dynamics of the Universe" (1st 1993 Mexico City, Mexico). Numerical simulations in astrophysics: Proceedings of the first UNAM-CRAY Supercomputing Workshop, "Numerical Simulations in Astrophysics : Modelling the Dynamics of the Universe" held in Mexico City, México, July 26-30, 1993. Cambridge University Press, 1994.

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José, Franco, ed. Numerical simulations in astrophysics: Proceedings of the first UNAM-CRAY Supercomputing Workshop, "Numerical Simulations in Astrophysics, Modelling the Dynamics of the Universe" held in Mexico City, México, July 26-30, 1993. Cambridge University Press, 1994.

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The hybrid multiscale simulation technology: An introduction with application to astrophysical and laboratory plasmas. Springer, 2002.

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Thompson, David. ICEG2D (v2.0): An integrated software package for automated prediction of flow fields for single-element airfoils with ice accretion. National Aeronautics and Space Administration, Glenn Research Center, 2001.

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Book chapters on the topic "Accretion (Astrophysics) - Computer simulation"

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Machida, Mami, Ryoji Matsumoto, Shigeki Miyaji, Kenji E. Nakamura, and Hideaki Tonooka. "Global Magneto-Hydrodynamic Simulations of Differentially Rotating Accretion Disk by Astrophysical Rotational Plasma Simulator." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-39999-2_31.

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Makita, Makoto, and Takuya Matsuda. "3D Finite Volume Simulation of Accretion Discs with Spiral Shocks." In Numerical Astrophysics. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4780-4_73.

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Hardee, Philip E., and Michael L. Norman. "Numerical Simulation of Weakly Magnetized Propagating Slab Jets." In Accretion Disks and Magnetic Fields in Astrophysics. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2401-7_21.

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Kudoh, T., R. Matsumoto, and K. Shibata. "Magnetically Driven Jets from Accretion Disks: Nonsteady 2.5D-MHD Simulation." In Astrophysics and Space Science Library. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5220-4_23.

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Stone, James M., Michael L. Norman, and Dimitri Mihalas. "Numerical Simulation of Mass Outflows from Star Forming Regions." In Accretion Disks and Magnetic Fields in Astrophysics. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2401-7_22.

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Molteni, D. A. P., and G. Giannone. "Three Dimensional Simulation of Accretion Disks with Smoothed Particle Hydrodynamics." In Accretion Disks and Magnetic Fields in Astrophysics. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2401-7_15.

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Averna, Daniela, and Valerio Pirronello. "Monte Carlo Simulation of H2 Formation by Cosmic Rays: Effect of the Grain Model." In Accretion Disks and Magnetic Fields in Astrophysics. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2401-7_19.

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Arnett, David. "Simulation of Nature By Computer." In Astrophysics and Space Science Library. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0864-8_2.

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Birn, J. "Computer Simulation of Reconnection in Planetary Magnetospheres." In Unstable Current Systems and Plasma Instabilities in Astrophysics. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-6520-1_14.

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Eckstein, M. C. "Station Keeping Strategy Test, Design and Optimization by Computer Simulation." In Astrophysics and Space Science Library. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4732-0_38.

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Conference papers on the topic "Accretion (Astrophysics) - Computer simulation"

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Torkelsson, Ulf, Gordon I. Ogilvie, Axel Brandenburg, Åke Nordlund, and Robert F. Stein. "Exploring magnetohydrodynamic turbulence on the computer." In Accretion processes in astrophysical systems: Some like it hot! - eigth astrophysics conference. AIP, 1998. http://dx.doi.org/10.1063/1.55945.

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Yamamoto, Makoto, and Masaya Suzuki. "Weak Coupling Strategy for Multi-Physics CFD Simulation in Engineering Problems." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-01012.

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Multi-Physics CFD Simulation will be one of key technologies in various engineering fields. There are two strategies to simulate a multi-physics phenomenon. One is “Strong Coupling”, and the other is “Weak Coupling”. Each can be employed, based on time-scales of physics embedded in a problem. That is, when a time-scale of one physics is nearly same as that of the other physics, we have to use Strong Coupling to take into account the interaction between two physics. On the other hand, when one time-scale is quite different from the other one, Weak Coupling can be applied. Considering the presen

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