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NSF-Funded Research To Forecast Space Weather,Protect The Power Grid,Pipelines And Satellites
NSF Forecast Space Weather,Power Grid Pipelines Satellites
2017/12/19
While Earth's weather reports center on precipitation, temperature, wind direction and velocity, and humidity, space weather forecasts attempt to predict activity that occurs on the sun -- and how the...
Modelling supermassive black hole growth: towards an improved sub-grid prescription
Modelling supermassive black hole growth sub-grid prescription
2012/2/24
Accretion onto supermassive black holes (SMBHs) in galaxy formation simulations is frequently modelled by the Bondi-Hoyle formalism. Here we examine the validity of this approach analytically and nume...
Simulating the Common Envelope Phase of a Red Giant Using SPH and Uniform Grid Codes
Simulating Common Envelope Phase Red Giant Using SPH Uniform Grid Codes
2011/10/21
We use three-dimensional hydrodynamical simulations to study the rapid infall phase of the common envelope interaction of a red giant branch star of mass equal to 0.88 \msun and a companion star of ma...
A grid of NLTE corrections for magnesium and calcium in late-type giant and supergiant stars: application to Gaia
formation radiative transfer stars late-type atmospheres abundances
2011/10/18
We investigate NLTE effects for magnesium and calcium in the atmospheres of late-type giant and supergiant stars. The aim of this paper is to provide a grid of NLTE/LTE equivalent width ratios W/W* of...
S-type stars are late-type giants whose atmosphere is enriched in carbon and s-process elements because of either extrinsic pollution by a binary companion or intrinsic nucleosynthesis and dredge-up o...
The Space Interferometry Mission Astrometric Grid Giant-Star Survey. III. Basic Stellar Parameters for an Extended Sample
stars abundances fundamental parameters atmospheres latetype rotation
2010/11/10
We present results of high resolution ( 55000) spectral observations of 830 photometrically pre-selected candidate red giants in the magnitude range of V = 9-12. We develop a pipeline for automated d...
COMPUTATION OF ASTEROID PROPER ELEMENTS ON THE GRID
Minor planets, asteroids Methods: data analysis
2010/10/29
A procedure of gridification of the computation of asteroid proper orbital elements is described. The need to speed up the time consuming computations and make them more e±cient is justified by the la...
Binary star formation and mass outflows：Mhd nested grid simulation
Binary star Mhd nested grid simulation mass outflows
2009/6/17
Binary star formation and mass outflows：Mhd nested grid simulation。
Synthetic ionizing spectra for planetary nebulae：a new grid of metal-line blanketed nlte model atmospheres
Synthetic ionizing spectra metal-line blanketed nlte model planetary nebulae
2009/6/11
Synthetic ionizing spectra for planetary nebulae：a new grid of metal-line blanketed nlte model atmospheres。
A NEW ,3D ADAPRIVE GRID CODE FOR ASTROPHYSICAL ANG DEOPHSICAL GASDYNAMICS
shock waves hydrodynamics
2009/6/4
A NEW ,3D ADAPRIVE GRID CODE FOR ASTROPHYSICAL ANG DEOPHSICAL GASDYNAMICS。