Building merger trees from cosmologicalN-body simulations
نویسندگان
چکیده
منابع مشابه
Building merger trees from cosmological N-body simulations towards improving galaxy formation models using subhaloes
Context. In the past decade or so, using numerical N-body simulations to describe the gravitational clustering of dark matter (DM) in an expanding universe has become the tool of choice for tackling the issue of hierarchical galaxy formation. As mass resolution increases with the power of supercomputers, one is able to grasp finer and finer details of this process, resolving more and more of th...
متن کاملConstructing Merger Trees that Mimic N -Body Simulations
We present a simple and efficient empirical algorithm for constructing dark-matter halo merger trees that reproduce the distribution of trees in the Millennium cosmological N body simulation. The generated trees are significantly better than EPS trees. The algorithm is Markovian, and it therefore fails to reproduce the non-Markov features of trees across short time steps, except for an accurate...
متن کاملRecipes for Baking Black Forest Databases - Building and Querying Black Hole Merger Trees from Cosmological Simulations
Large-scale N-body simulations play an important role in advancing our understanding of the formation and evolution of large structures in the universe. These computations require a large number of particles, in the order of 10-100 of billions, to realistically model phenomena such as the formation of galaxies. Among these particles, black holes play a dominant role on the formation of these st...
متن کاملSimulating Hospital Merger Simulations*
Several recent papers estimate discrete choice models in hospital markets, and then use those estimates to generate a hospital-by-hospital measure of market power. They then use these market power measures as an independent variable in hospital price regressions. The estimated relationship between market power and price is then used to simulate the effects of mergers. In this paper, we seek to ...
متن کاملGalaxy formation using halo merger histories taken from N-body simulations
We develop a hybrid galaxy formation model which uses outputs from an N-body simulation to follow the merger histories (or “merger trees”) of dark matter halos and treats baryonic processes, such as the cooling of gas within halos and subsequent star formation, using the semi-analytic model of Cole et al. We compare this hybrid model to an otherwise identical model which utilises merger tree re...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200911787