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Evolution of Clusters of Galaxies
Publications of the Astronomical Society of Japan, 1993Abstract 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, 2001New 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
2007We 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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Chemical Evolution of the Galaxy
Annual Review of Astronomy and Astrophysics, 1991Since 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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1976
Galaxies come in a wide variety of shapes and sizes. Until now, it has not really mattered for the purposes of this book just how galaxies differ from one another — we have been primarily concerned to account for their existence, and have considered them as ‘test particles’ which enable us to observe the expansion of the Universe. But if we are to find
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Galaxies come in a wide variety of shapes and sizes. Until now, it has not really mattered for the purposes of this book just how galaxies differ from one another — we have been primarily concerned to account for their existence, and have considered them as ‘test particles’ which enable us to observe the expansion of the Universe. But if we are to find
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Galaxy Evolution: Inhomogeneous Halo Collapse
Astrophysics and Space Science, 2003In an effort to study the halo globular clusters we perform a simulation of inhomogeneous halo collapse using a SPH/N-body code. We include dark matter particles, (cooling) gas, and stars. Supernova feedback is included as a heat source for the gas in the local environment of star forming regions.
Jeannette M. Myers +2 more
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Cosmological Evolution in Radio Galaxies
Nature, 1971ROWAN-ROBINSON has presented evidence that radio galaxies exhibit remarkably strong evolutionary effects with cosmological epoch1. Examination of his evidence, however, indicates that, although an evolutionary effect may indeed be present, no reliable estimate of the time scale involved can yet be made in the way he proposes.
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A population of red candidate massive galaxies ~600 Myr after the Big Bang
Nature, 2023Ivo Labbe +2 more
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