Cosmological Simulations in a Relational Database: Modelling and Storing Merger Trees

Details Cosmological Simulations in a Relational Database: Modelling and Storing Merger Trees Cosmological Simulations in a Relational Database: Modelling and Storing Merger Trees

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..351..212l&link_type=abstract

Astronomical Data Analysis Software and Systems XV ASP Conference Series, Vol. 351, Proceedings of the Conference Held 2-5 Octob

Mathematics

Logic

11

Scientific paper

We present a method for storing tree-like data structures in a relational database that allows for fast querying of children and parents of any node and from and down to any level. We have used this method in storing halo merger trees derived from a large cosmological N-body simulation and the merger trees of model galaxy catalogues derived from the halo catalogues using semi-analytical methods. We give SQL queries corresponding to typical science questions that can be asked from such a database and present an online query interface available through the web portal of the German Astrophysical Virtual Observatory.

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