Results 221 to 230 of about 25,454 (269)

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, Junichiro Makino, Toshikazu Ebisuzaki   +2 more
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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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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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THE FORMATION AND EVOLUTION OF GALAXIES

The New Cosmology, 2005
The past decade has witnessed the establishment of a “standard paradigm” for structure formation in the Universe. It is now universally accepted that the dominant matter component of the Universe is in some form of non-baryonic, weaklyinteracting dark matter. Structure in the dark matter originated from inhomogeneities that were generated shortly after
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Chemical Evolution of the Galaxy

Annual Review of Astronomy and Astrophysics, 1991
Since the discovery of the cosmic microwave background ( 1 84), it is gen­ erally assumed that the universe originated from a hot big bang (78). Detailed nucleosynthesis calculations based on the hot big bang model (e.g. 4, 1 82, 221 ) showed that no element heavier than 9Be could have been synthesized primordially with an abundance exceeding 101 4 by ...
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Evolution of Galaxies in Clusters

2004
In dieser Doktorarbeit studiere ich die Entstehung und Entwicklung von Galaxien in Galaxienhaufen sowohl theoretisch als auch unter Einbeziehung von Beobachtungsdaten. Diese Doktorarbeit gliedert sich in zwei Teile: Einem theoretischen Teil schliesst sich eine Datenanalyse an. Im ersten Kapitel beschreibe ich warum Galaxienhaufen wichtig sind, erklaere
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The Evolution of Galaxies

Publications of the Astronomical Society of the Pacific, 1959
spiral structure is rather more open. In Sc nebulae the nucleus is very small, becoming quite inconspicuous in type Sc+. The spiral arms are very loosely wound and have a patchy structure due to the presence of supergiant stars and emission nebulae.
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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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EPOCHS VI: the size and shape evolution of galaxies since z ∼ 8 with JWST Observations

Monthly Notices of the Royal Astronomical Society, 2023
Katherine Ormerod, Nathan J Adams, Thomas Harvey   +2 more
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