Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Halo and Galaxy Formation Histories from the Millennium Simulation:
  Public release of a VO-oriented and SQL-queryable database for studying the
  evolution of galaxies in the LambdaCDM cosmogony   The Millennium Run is the largest simulation of the formation of structure
within the $\Lambda$CDM cosmogony so far carried out. It uses $10^{10}$
particles to follow the dark matter distribution in a cubic region
500$h^{-1}$Mpc on a side, and has a spatial resolution of 5 $h^{-1}$kpc.
Application of simplified modelling techniques to the stored output of this
calculation allows the formation and evolution of the $\sim 10^7$ galaxies more
luminous than the Small Magellanic Cloud to be simulated for a variety of
assumptions about the detailed physics involved. As part of the activities of
the German Astrophysical Virtual Observatory we have used a relational database
to store the detailed assembly histories both of all the haloes and subhaloes
resolved by the simulation, and of all the galaxies that form within these
structures for two independent models of the galaxy formation physics. We have
created web applications that allow users to query these databases remotely
using the standard Structured Query Language (SQL). This allows easy access to
all properties of the galaxies and halos, as well as to the spatial and
temporal relations between them and their environment. Information is output in
table format compatible with standard Virtual Observatory tools and protocols.
With this announcement we are making these structures fully accessible to all
users. Interested scientists can learn SQL, gain familiarity with the database
design and test queries on a small, openly accessible version of the Millennium
Run (with volume 1/512 that of the full simulation). They can then request
accounts to run similar queries on the databases for the full simulations.

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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph