Results 131 to 140 of about 5,210 (162)

Chemical evolution in simulations of galaxy formation

Astrophysics and Space Science, 2002
We developed a new algorithm to implement detailed chemical evolution in SPH models of galaxy formation. Delayed gas restitution and different production timescales for different elements are taken into account, with minor computational effort. The algorithm is especially conceived for SPH simulations with large numbers of particles, and for parallel ...
Portinari,L, CARRARO, GIOVANNI, Lia,C
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The Evolution of the Star Formation Rate in Galaxies

Astrophysics and Space Science, 2001
The aim of this work is to provide clues for the understanding of the star formation history of the universe. We study the process of star formation in galactic objects in hierarchical clustering scenarios using hydrodynamical cosmological simulations of standard Cold Dark Matter Universe. We estimate the specific star formation rate (sSFR) of galactic
SofÍa Alejandra Cora, Hernán Muriel, Patricia Beatriz Tissera, Diego GarcÍa Lambas, Mirta Beatriz Mosconi   +4 more
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Galaxy Formation and Evolution

2009
Major steps in our knowledge of high redshift galaxies and quasars were made possible by the synergy between the Hubble Space Telescope (HST) and 8–10 m class optical-near infrared ground-based telescopes. The galaxy samples were built from very deep, pencil-beam surveys with the HST and deep, wider area surveys undertaken with ground-based facilities.
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Galaxy formation and evolution

Physica Scripta, 1991
The presence of high z quasars and radio galaxies tells us that galaxy formation began at z greater than 5, but leaves unanswered the question of when the bulk of galaxies formed. Recent near infrared number counts of galaxies strongly favor a cosmological geometry with q(sub 0) = 0.5 and lambda = 0.
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Formation and evolution of elliptical galaxies

Monthly Notices of the Royal Astronomical Society, 2002
We address the problem of the formation and evolution of elliptical galaxies (from dwarf to normal/giant systems). In particular, by means of N-body-tree–SPH simulations, incorporating cooling, star formation, energy feedback and chemical evolution, we intend to explore whether the formation of elliptical galaxies from the monolithic collapse of ...
CHIOSI, CESARE, CARRARO, GIOVANNI
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The Physics of Galaxy Formation and Evolution

2016
The theoretical studies about galaxy formation and evolution are the subject of this Chapter. They started with the recognition that the Hubble sequence is not a simple morphological description of galaxies, but a possible scheme separating and characterizing the physical processes that bring galaxies to their present form.
D'ONOFRIO, MAURO, RAMPAZZO, ROBERTO, ZAGGIA, SIMONE, Lake, George, CHIOSI, CESARE, De Lucia, Gabriella, Einasto, Jaan, Kroupa, Pavel, de Carvalho, Reinaldo Ramos, Renzini, Alvio, Ciotti, Luca, Matteucci, Francesca, Moss, David L., Longair, Malcolm S.   +13 more
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Observing galaxy formation and evolution

Il Nuovo Cimento B, 2006
Not ...
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The Formation & Evolution of Galaxies

Daedalus, 2014
Weighing in at 1042 kilograms and measuring 1021 meters across, galaxies are perhaps the most awe-inspiring objects known to mankind. They are also the only places in an otherwise dark and unforgiving universe where stars and planets are able to form. In the past five to ten years we have made enormous progress in understanding when galaxies came into
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Physical Models of Galaxy Formation in a Cosmological Framework

Annual Review of Astronomy and Astrophysics, 2015
Romeel Dave
exaly  

Theoretical Challenges in Galaxy Formation

Annual Review of Astronomy and Astrophysics, 2017
Jeremiah Ostriker, Thorsten Naab
exaly