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An elliptical galaxy is defined as a type of galaxy that exhibits a correlation between the velocity dispersion of its stars and its intrinsic luminosity. It is also characterized by its occupation of a 'fundamental plane' where the galaxy size is tightly correlated with the surface brightness and velocity dispersion.
Elliptical galaxies are characterized by several properties that make them distinct from other classes of galaxy. They are spherical or ovoid masses of stars, starved of star-making gases.
An elliptical galaxy is a type of galaxy that is classified based on its shape and visual appearance. It is typically large, contains millions to trillions of stars, and lacks the spiral arms seen in spiral galaxies.
The discovery that elliptical galaxies rotate much more slowly than a fluid body with the same shape has led to a qualitative change in our understanding of the dynamics of these systems. It is now believed that elliptical galaxies are fully triaxial in shape.
15 Ιουλ 2009 · One of the most-debated subjects in modern astrophysics is how elliptical galaxies, which are among the oldest known objects in the Universe, formed. Among the various likely formation...
21 Φεβ 2006 · Elliptical galaxies are the most massive stellar systems in the local Universe and appear to define a homogeneous class of objects with uniformly old and red populations, negligible amounts of gas and very little star formation.
11 Σεπ 2002 · According to Bender, Burstein & Faber (1992, 1993) elliptical galaxies (EG) group into three fundamental categories, depending on their absolute magnitude and surface density: giant, compact and dwarf ellipticals.
