Results 321 to 330 of about 5,320,922 (369)
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Research Notes of the AAS, 2020
Abstract Our research focuses on determining the dynamical orbital parameters associated with galaxy collisions. We are accomplishing this by optimizing numerical models of galactic interactions with astronomical observations of colliding galaxies and measuring the uncertainty in the parameter space of these models. This paper will focus
Matthew Ogden +2 more
exaly +2 more sources
Abstract Our research focuses on determining the dynamical orbital parameters associated with galaxy collisions. We are accomplishing this by optimizing numerical models of galactic interactions with astronomical observations of colliding galaxies and measuring the uncertainty in the parameter space of these models. This paper will focus
Matthew Ogden +2 more
exaly +2 more sources
Large-Scale Multithreading Self-Gravity Simulations for Astronomical Agglomerates
2019 Winter Simulation Conference (WSC), 2019This article presents parallel multithreading self-gravity simulations for astronomical agglomerates, applying High Performance Computing techniques to allow the efficient simulation of systems with a large number of particles. Considering the time scales needed to properly simulate the processes involved in the problem, two parallel mesh-based ...
Sérgio Nesmachnow
exaly +2 more sources
The Stellarium Planetarium for the Simulation of the Astronomical Landscapes of Ancient Stargazers
SSRN Electronic Journal, 2016 The paper is proposing several examples of the use of Stellarium, an open source free software planetarium, for simulating the astronomical landscapes of the ancient stargazers. Here we will focus on the motion of the stars, in particular with respect to the precession of Equinoxes. Usually, we consider that this precession was discovered by Hipparchus
Amelia Carolina Sparavigna
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High-performance computing simulations of self-gravity in astronomical agglomerates
SIMULATION, 2021This article describes the advances in the design, implementation, and evaluation of efficient algorithms for self-gravity simulations in astronomical agglomerates. Three algorithms are presented and evaluated: the occupied cells method, and two variations of the Barnes–Hut method using an octal and a binary tree.
Néstor Rocchetti +2 more
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Geophysical Research Letters, 2021
The relative influence of insolation, CO2, and ice sheets on the East Asian summer monsoon (EASM) is not well understood especially at regional scale.
A. Lyu, Q. Yin, M. Crucifix, Y. B. Sun
semanticscholar +1 more source
The relative influence of insolation, CO2, and ice sheets on the East Asian summer monsoon (EASM) is not well understood especially at regional scale.
A. Lyu, Q. Yin, M. Crucifix, Y. B. Sun
semanticscholar +1 more source
MAISIE: a multipurpose astronomical instrument simulator environment
SPIE Proceedings, 2016Astronomical instruments often need simulators to preview their data products and test their data reduction pipelines. Instrument simulators have tended to be purpose-built with a single instrument in mind, and at- tempting to reuse one of these simulators for a different purpose is often a slow and difficult task.
Alan O'Brien +3 more
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Data modeling for analytical astronomical simulation VV and A
SPIE Proceedings, 2006This paper presents a novel analytical method for comparing simulation data with measured flight data to with the goal of proving Equivalence and Consistency between the model and the real data. Our method overcomes the problems of disparity in the inputs to the simulation and varying number of parameters between the simulation and the measured flight ...
James W. Handley +3 more
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Numerical simulation of astronomical observations with ISO-LWS
Il Nuovo Cimento C, 1993The purpose of this work is the numerical simulation of the ISO-LWS spectrometer output with a computer code aiming at obtaining data similar as far as possible to those to be gained during the mission. With such data the processing and analysis programmes will be tested in order to assess the instrument capabilities and limits.
E. Tommasi, P. Saraceno, R. Orfei
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CAOS: a numerical simulation tool for astronomical adaptive optics (and beyond)
SPIE Proceedings, 2004We present recent developments of the CAOS "system", an IDL-based Problem Solving Environment (PSE) whose original aim was to define and simulate as realistically as possible the behavior of a generic adaptive optics (AO) system, from the atmospheric propagation of light, to the sensing of the wave-front aberratoins and the correction through a ...
M. CARBILLET +12 more
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Astronomical Telescopes + Instrumentation, 2022
Fe39Co49Cr10Ni2 has exhibited ultra-low thermal expansion with its average coefficient of approximately 0.13 × 10−6/K between 100 K and 300 K from cryogenic to room temperatures.
H. Fujii +5 more
semanticscholar +1 more source
Fe39Co49Cr10Ni2 has exhibited ultra-low thermal expansion with its average coefficient of approximately 0.13 × 10−6/K between 100 K and 300 K from cryogenic to room temperatures.
H. Fujii +5 more
semanticscholar +1 more source