An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 7 Search : hierarchical
hierarchical
  پایگانی   
pâygâni

Fr.: hiérarchique   

Of, belonging to, or characteristic of a hierarchy. → hierarchical clustering; → hierarchical cosmology; → hierarchical multiple system; → hierarchical structure formation.

hierarchy; → -al.

hierarchical clustering
  خوشه‌بندی ِ پایگانی   
xušé bandi-ye pâygâni

Fr.: groupement hiérarchique   

A model in which a system of self-gravitating particles will gradually aggregate into larger and larger gravitationally bound groups and clusters.

hierarchical; → clustering.

hierarchical cosmology
  کیهان‌شناسی ِ پایگانی   
keyhânšenâsi-ye pâygâni

Fr.: cosmologie hiérarchique   

A cosmology characterized by clustering of galaxy clusters in increasingly larger systems.

hierarchical; → cosmology.

hierarchical multiple system
  راژمان ِ بستایی ِ پایگانی   
râžmân-e bastâyi-ye pâygâni

Fr.: système multiple hiérarchique   

A → multiple star system in which the stars can be divided into two groups, each of which traverses a larger orbit around the system's center of mass. Each of these smaller groups must also be hierarchical, which means that they must be divided into smaller subgroups which themselves are hierarchical, and so on. Hierarchical multiple systems have long-term dynamical stability.

hierarchical; → multiple; → system.

hierarchical structure formation
  دیسش ِ ساختار ِ پایگانی   
diseš-e sâxtâr-e pâygâni

Fr.: formation de structures hiérarchiques   

A cosmological → structure formation model in which the smallest gravitationally bound structures (→ quasars and galaxies) form first, followed by → groups, → galaxy clusters, and → superclusters of galaxies.

hierarchical; → structure; → formation.

hierarchical triple system
  راژمان ِ بستایی ِ ناپایگانی   
râžmân-e bastâyi-ye nâpâygâni

Fr.: système multiple non hiérarchique   

A triple star system in which the (inner) binary is orbited by a third body in a much wider orbit. → hierarchical multiple system.

hierarchical; → stellar; → system.

non-hierarchical multiple system
  راژمان ِ بستایی ِ ناپایگانی   
râžmân-e bastâyi-ye nâpâygâni

Fr.: système multiple non hiérarchique   

A → multiple star system that lacks the characteristics of a → hierarchical multiple system.

non-; → hierarchical; → multiple; → system.