Chemical Evolution of Spheroidal Systems(Proceedings of Japan-France Seminar on Chemical Evolution of Galaxies with Active Star Formation)

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概要

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• A model of chemical evolution for spheroidal systems is constructed assuming a relation between binding energy and mass of a system Ω_G∝M_G^<1.45> and a universal IMF of stars dn/dlogm∝m<-0.95>. Taking into account the effect of stopping the star formation due to gas removal by a galactic wind, we successfully reproduced the chemical and structural properties of gE galaxies, dE galaxies, and globular clusters. The average metallicity of stars in a system declines from gEs through dEs monotonically, while the galactic mass loss expands dEs most significantly among others, causing the distinct sequences of gEs, dEs, and globulars in the diameter-surface brightness diagram. It is suggested that all the spheroidal systems were formed as a one-parameter family of mass.Chemical evolutiongE galaxiesdE galaxiesglobular clusters

• 東北大学の論文
• 1987-03-20

著者

• Yoshii Y

  Univ. Tokyo Tokyo

• Yoshii Yuzuru

  Tokyo Astronomical Observatory University Of Tokyo

関連論文

• Thermal Evolution of Primordial Gas Clouds and Mass Range of Zero-Metal Stars
• Chemical Evolution of Spheroidal Systems(Proceedings of Japan-France Seminar on Chemical Evolution of Galaxies with Active Star Formation)

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