An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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power-law elliptical galaxy
  کهکشان ِ بیضی‌گون با قانون ِ توانی  
kahkešÃ¢n-e beyzigun bâ qânun-e tavâni
Fr.: galaxie elliptique en loi de puissance  

An → elliptical galaxy whose → surface brightness can be approximated by a single → power law at small radii (r ≤ 10-20’’). More modern interpretations have emphasized that these profiles can be better understood as the inward continuation of the galaxy’s overall → Sersic profile, usually modified by an additional, nuclear-scale stellar component (S. P. Rusli et al., 2013, AJ 146, 160).

See also: → power; → law; → galaxy.