Pictures showing density plots and movies of the Virgo simulations.
All of the materials in this page were made by Joerg
Colberg. The reference to the Virgo simulations: Jenkins et al, 1998
Astophysical Journal,499,20-40
Standard CDM
- A density plot at z=0. The brightness of the colours is
proportional to the log of the density of the particles.
Note: This picture has a size of 3.4MB!
- A movie which shows the evolution of structure inside a fixed slice
from z=50.0 to present epoch.
- A mosaic which shows several blow ups at z=0.
Lambda CDM
- Density plot at z=0.
- A movie which shows (at z=0) the spatial
distribution of matter in the box: A slice is moved from one end of the
box to another.
- Blow-up mosaic
Open CDM
Tau CDM
Virgo simulations -model comparison-
The pictures below show projected mass distributions
in slices of the Virgo simulation boxes. The first one has 12 panels,
3 different redshifts in a row for each model. Thus in this picture we
see the time evolution of structures along the horizontal sequence
in each model as well as the model difference at the same epoch
along the vertical sequence.
The second picture is a comparison of the 4 models at redshift 0, which is
equivalent to a collection of 4 figures in one column in the first picture.
The third picture at redshift 1 and the fourth at z=3.
Pictures are downloadable in the original sizes
in various format. If you would like to download these pictures,
PLEASE ATTACH THE SUITABLE CREDIT AND REFERENCE GIVEN ON THE TOP OF THIS PAGE.
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3D plot
This picture shows an isodensity contour at mean density of an eighth
of the LCDM GIF box (i.e. the volume is (70.5 Mpc/h)3). This is
one single object - all other and smaller objects have been removed (the code
assumed periodic boundaries). This object fills only about 10% of the volume
but contains more than 80% of the mass
in the volume. In order to enhance structure the density field has been
smoothed adaptively.
This MOVIE shows huge empty regions (the voids), long filaments
and even some sheets.
Credit: Joerg Colberg
This picture was produced by the same technique, but here the
complete tCDM box (size (85 Mpc/h)3) at
an overdensity of 2 is shown. Note how nicely it percolates!
This object contains roughly half the mass in the box but
has only 4% of the volume!
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Credit: Joerg Colberg
Movies -the cosmic voyage-
Fly-through
Enjoy virtual fly-through! in one of our
GIF simulation boxes.
Fly-through II -galaxies-
The same fly-through, but here shown are only the
galaxies. They are colour coded according to B-V band.
Cosmic foam
The picture shows an isodensity contour in one of the
GIF simulation boxes.
Cluster formation
The above picture shows formation of a galaxy cluster in the tCDM GIF simulation.
(Starting redshift 20.0)
The formation of the same cluster, starting at a redshift of 2.5, using
a 3D representation can be obtained here.
Constrained realization
A Constrained Realization of the Local Universe with about 30
million particles.
Zoom in
Zooming in to the central region of
tCDM GIF simulation box.
Last modified: Thu Jan 19 13:30:54 MET 2000
by Virgo Administrator
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