A Caltech Library Service

Comparison Between Simulated and Observational Results of Galaxy Formation for Large Scale Structures

Li, Gongjie and Scoville, Nicholas Z. (2009) Comparison Between Simulated and Observational Results of Galaxy Formation for Large Scale Structures. In: The starburst-AGN connection. ASP Conference Series. No.408. Astronomical Society of the Pacific , San Francisco, CA, pp. 377-379. ISBN 978-1-58381-696-7.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The Millennium simulation is the largest numerical simulation of how minor fluctuations in the density of the universe’s dark matter distribution are amplified by gravity to develop into the large scale structures(LSS) and galaxy clusters seen today(Springel et al. 2005). Although the simulations have been compared with the astronomical observations of the local universe, the simulations have not been widely compared with high redshift, early universe observations. In our study we compare the simulation data(Wang et al. 2008; Guo et al. 2008(in preparation)) for the first time with observations from the COSMOS survey(Scoville et al. 2006). Three quantities are proposed to characterize the structures and the structures distribution, namely the percent area occupied by LSS at each redshift, the average area of LSS and the shapes as characterized by the square root of the area divided by the circumference. We calculate these quantities for both the observations and the simulations, and quantify discrepancies between the existing simulations and observations. In particular, the simulations exhibit earlier development of dense structures than is seen in the observational data.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Li, Gongjie0000-0001-8308-0808
Scoville, Nicholas Z.0000-0002-0438-3323
Additional Information:© 2009 Astronomical Society of the Pacific. Thanks Qi Guo for providing the simulation data.
Series Name:ASP Conference Series
Issue or Number:408
Record Number:CaltechAUTHORS:20100915-075118031
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19957
Deposited By: Tony Diaz
Deposited On:16 Sep 2010 23:25
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page