Results 151 to 160 of about 208,581 (197)

Chemical Evolution of Galaxies

Annual Review of Astronomy and Astrophysics, 1976
The various nucleosynthetic processes needed to account for the formation of the different nuclear species have been described in the previous chapters as well as the location of these nucleosynthetic events. At the beginning of this monograph, the evolution of the matter which constitutes the celestial bodies such as planets, stars and galaxies was ...
Audouze, J., Tinsley, B.M.
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GRB Host Galaxies and Galaxy Evolution

EAS Publications Series, 2007
Galaxy properties in general and properties of host galaxies of gamma-ray bursts (GRBs) in particular are investigated, using N -body/Eulerian hydrodynamic simulations and the stellar population synthesis model, Starburst99 . We identify simulated galaxies that have optical star formation rate and SFR -to-luminosity ratio similar
S. Courty   +2 more
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Galaxy evolution in clusters

Astrophysics and Space Science, 2003
The galaxy populations in present-day clusters are distinctly different from those of the field, indicating that environment plays a strong role in galaxy evolution. This review discusses some of the recent observations of moderate to high redshift clusters.
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Evolution of Clusters of Galaxies

Publications of the Astronomical Society of Japan, 1993
Abstract We have investigated the evolution of clusters of galaxies using direct N-body simulations in which each galaxy is modeled by many particles. We found that the positive correlation between the masses and the distances of galaxies from the center of a cluster develops as the result of perturbations due to close encounters with ...
Yoko Funato   +2 more
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Galaxy evolution: the ISOCAM view

Astrophysics and Space Science, 2001
New observations of nearby and distant galaxies in the mid infrared with ISOCAM have been used to study the star formation rate in these galaxies. The mid infrared flux density is a good indicator, similar to Ha, in the disk of spiral galaxies. In more active starburst, the mid infrared traces the youngest star formation complexes, still embedded in ...
Laurent Vigroux   +10 more
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BARRED GALAXIES AND GALAXY EVOLUTION

2007
We know from near-infrared imaging that bars are present in more than three quarters of local disk galaxies. Several studies have recently led to the con- clusion that the fraction, as well as the properties, of bars in galaxies have not changed much from a redshift of about unity to the present day.
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