Results 21 to 30 of about 3,113 (292)

Global Vlasov simulation on magnetospheres of astronomical objects [PDF]

Journal of Physics: Conference Series, 2013
Space plasma is a collisionless, multi-scale, and highly nonlinear medium. There are various types of self-consistent computer simulations that treat space plasma according to various approximations. We develop numerical schemes for solving the Vlasov (collisionless Boltzmann) equation, which is the first-principle kinetic equation for collisionless ...
Takayuki Umeda, Yosuke Ito, Keiichiro Fukazawa   +2 more
openaire   +2 more sources

ScopeSim: a flexible general purpose astronomical instrument data simulation framework in Python [PDF]

Software and Cyberinfrastructure for Astronomy VI, 2020
15 pages, 4 figures, SPIE 2020 conference proceeding.
Leschinski, K., Buddelmeijer, H., Czoske, O., Verdugo, M., Verdoes-Kleijn, G., Zeilinger, W.   +5 more
openaire   +6 more sources

End-to-end simulation framework for astronomical spectrographs: SOXS, CUBES, and ANDES [PDF]

Modeling, Systems Engineering, and Project Management for Astronomy XI
We present our numerical simulation approach for the End-to-End (E2E) model applied to various astronomical spectrographs, such as SOXS (ESO-NTT), CUBES (ESO-VLT), and ANDES (ESO-ELT), covering multiple wavelength regions. The E2E model aim at simulating the expected astronomical observations starting from the radiation of the scientific sources (or ...
Scaudo, A., Genoni, M., Causi, G. Li, Cabona, L., Landoni, M., Campana, S., Schipani, P., Claudi, R., Aliverti, M., Baruffolo, A., Ben-Ami, S., Biondi, F., Capasso, G., Cosentino, R., D'Alessio, F., D'Avanzo, P., Hershko, O., Kuncarayakti, H., Munari, M., Santhakumari, K. Radhakrishnan, Pignata, G., Rubin, A., Scuderi, S., Vitali, F., Young, D., Achrén, J., Araiza-Duran, J. A., Arcavi, I., Battaini, F., Brucalassi, A., Bruch, R., Cappellaro, E., Colapietro, M., Della Valle, M., De Pascale, M., Di Benedetto, R., D'Orsi, S., Gal-Yam, A., Hernandez, M., Kotilainen, J., Marty, L., Mattila, S., Rappaport, M., Ricci, D., Riva, M., Salasnich, B., Smartt, S., Sanchez, R. Zanmar, Stritzinger, M., Ventura, H., Cupani, G., Porru, M., Franchini, M., Cirami, R., Calderone, G., Covino, S., Smiljanic, R., Monteiro, M., Balestra, A., Sordo, R., Mason, E., Rousseu, S., Leão, I. de Castro, Zanutta, A., Martins, A. de Meideros, Sosnowska, D., Marquart, T., Boisse, I., Sousa, S., Hernandez, J., Piskunov, N., Puschnig, J., Senna, N., Martins, B., Di Marcantonio, P., Marconi, A.   +75 more
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Digital Reproduction and Virtual Simulation System Design of Astronomical Clock-tower

Journal of Physics: Conference Series, 2020
Abstract The author designed and developed a virtual simulation system to introduce people to the great astronomical installations called astronomical Clock-tower of the Song Dynasty in China. In this paper, the operation data of the replica of the Astronomical Clock-tower was studied and defined, the digital replication and working ...
Tian Zhang, De-Sheng Lv
openaire   +2 more sources

The Athena++ Adaptive Mesh Refinement Framework: Multigrid Solvers for Self-gravity

The Astrophysical Journal Supplement Series, 2023
We describe the implementation of multigrid solvers in the Athena++ adaptive mesh refinement (AMR) framework and their application to the solution of the Poisson equation for self-gravity.
Kengo Tomida, James M. Stone
doaj   +1 more source

Accelerating Polyhedral Discrete Element Method with CUDA

The Astronomical Journal, 2023
This paper presents an efficient CUDA-based implementation of a nonspherical discrete element method where irregular particles are described by using polyhedrons. Two strategies are employed to exploit the parallelism of the numerical method.
Tongge Wen, Xiangyuan Zeng
doaj   +1 more source

Report on the ASTERICS projects CORELib and ROAst [PDF]

EPJ Web of Conferences, 2019
Two projects included in the OBELICS work package of the ASTERICS cluster will be described: CORELib and ROAst. CORELib is a collection of simulated showers induced by primary cosmic rays and a common framework to produce and manage such large production.
Bozza Cristiano, Pellegrino Carmelo, Stellacci Simona Maria, Spisso Bernardino   +3 more
doaj   +1 more source

Can Cosmological Simulations Reproduce the Spectroscopically Confirmed Galaxies Seen at z ≥ 10?

The Astrophysical Journal Letters, 2023
Recent photometric detections of extreme ( z > 10) redshift galaxies from the JWST have been shown to be in strong tension with existing simulation models for galaxy formation and in the most acute case, in tension with ΛCDM itself.
B. W. Keller, F. Munshi, M. Trebitsch, M. Tremmel   +3 more
doaj   +1 more source

A simulated annealing algorithm to quantify patterns in astronomical data [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
ABSTRACT We develop an optimization algorithm, using simulated annealing for the quantification of patterns in astronomical data based on techniques developed for robotic vision applications. The methodology falls in the category of cost minimization algorithms and it is based on user-determined interaction – among the pattern elements –
Chira, Maria, Plionis, Manolis
openaire   +2 more sources

An Optimal Integral Controller for Adaptive Optics Systems

Sensors, 2023
Integral controllers are commonly employed in astronomical adaptive optics. This work presents a novel tuning procedure for integral controllers in adaptive optics systems which relies on information about the measured disturbances. This tuning procedure
Pedro Escárate, María Coronel, Rodrigo Carvajal, Juan C. Agüero   +3 more
doaj   +1 more source