搜索结果: 1-7 共查到“天文学 requirements”相关记录7条 . 查询时间(0.046 秒)
The bar-halo interaction - I. From fundamental dynamics to revised N-body requirements
dark matter formation
2014/12/23
A galaxy remains near equilibrium for most of its history. Only through resonances can non-axisymmetric features, such as spiral arms and bars, exert torques over large scales and change the overall s...
Science drivers and requirements for an Advanced Technology Large Aperture Space Telescope (ATLAST): implications for technology development and synergies with other future facilities
Galaxy Large-Aperture Space Telescope
2014/12/22
The Advanced Technology Large-Aperture Space Telescope (ATLAST) is a concept for an 8-meter to 16-meter UVOIR space observatory for launch in the 2025-2030 era. ATLAST will allow astronomers to answer...
Measurement requirements for a near-Earth asteroid impact mitigation demonstration mission
Near-Earth Asteroids Impact Mitigation Spacecraft Missions
2011/10/12
A concept for an Impact Mitigation Preparation Mission, called Don Quijote, is to send two spacecraft to a Near-Earth Asteroid (NEA): an Orbiter and an Impactor. The Impactor collides with the asteroi...
Photometric redshift requirements for lens galaxies in galaxy-galaxy lensing analyses
requirements lens galaxies'galaxy-galaxy lensing analyses
2011/9/29
Weak gravitational lensing is a valuable probe of galaxy formation and cosmology. Here we quantify the effects of using photometric redshifts (photo-z) in galaxy-galaxy lensing, for both sources and l...
Spiral Galaxies：Requirements for accurate Photometric Bulge/Disk Decomposition
Spiral Galaxies Disk Decomposition Photometric Bulge
2009/6/11
Spiral Galaxies：Requirements for accurate Photometric Bulge/Disk Decomposition。
Needs and requirements for future x-ray observations of hot galactic halos
HALOS X-RAYS JETS AND OUTFLOWS
2009/6/4
Galaxies are key objects for the study of cosmology, the life cycle of matter,and stellar evolution. X-ray observations have given us a new key window intothese building blocks of the Universe, that a...
Radiation effects and shielding requirements in human missions to the moon and Mars
radiation remains Mars human missions moon
2009/6/1
Protection from radiation remains a concern for lunar human missions and a major hurdle for Mars human missions. Quantitative estimates are provided.