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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.
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.
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.
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...
Elliptical Galaxies Ortwin E. Gerhard Landessternwaxte, KSnigstuhl, D-69117 Heidelberg, Germany 1 Introduction For a long time, beginning with Hubble's original classification, elliptical galaxies were regarded as structureless, presumably rotationally flattened, gas free systems of old stars.
