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Warm/Cold Dark Matter

These movies show the dark matter, gas and stellar distribution in a warm dark matter simulation and its corresponding cold dark matter simulation (Box 64 – 186592 – WDM and  Box 64 – 186592 , 4096^3 resimulation, Local Group).

Evolution of the gas density in the Local Group ( CDM , 4096^3 resimulation, Box 64 – 186592), from z=41 to z=0. Centered roughly on M31.
(K. Riebe; PMViewer)

[avi, 800×800, 12 MB]

Evolution of the gas density in the Local Group ( WDM , 4096^3 resimulation, Box 64 – 186592 – WDM), from z=41 to z=0.
Same as above, i.e. same color table, same density range, same camera distance (about 3.3 Mpc/h). Centered roughly on M31, yet not showing exactly the same section of the universe as movie above.
(K. Riebe; PMViewer)

[avi, 800×800, 11 MB]

Evolution of the gas density in the Local Group for CDM (left) and WDM (right), 4096^3 resimulation, from z=41 to z=0.
Both show roughly the region of the Local Group, though not exactly the same. The camera distance is in both cases 3.3 Mpc/h, the same color table and density scale was used.
(K. Riebe; PMViewer)

[avi, 1280×720, 12 MB]
snapshot z=1.071 [jpg, 1280×720, 697 KB]
snapshot z=0 [jpg, 1280×720, 811 KB]

Evolution of the stellar density in the Local Group, WDM .
Camera distance is again about 3.3 Mpc/h, centered roughly on M31.
Only every second snapshot was used to generate a quick movie.
(K. Riebe; PMViewer)

[avi, 800×800, 1.1 MB]
[jpg, 800×800, 26 KB]

Evolution of the dark matter density in the Local Group, WDM .
Camera distance is again about 3.3 Mpc/h, centered roughly on M31.
(K. Riebe; PMViewer)

[avi, 1024×768, 12 MB]
snapshot z=0 [jpg, 1024×768, 858 KB]
snapshot z=1.071 [jpg, 1024×768, 842 KB]

Rotation of M33 at z=0, CDM, at a distance of 64 kpc, orientated face-on.
(K. Riebe; PMViewer)[avi, 1024×768, 7.6 MB]
[jpg, 1024×768, 576 KB]
Same as before, but with red-green-blue color table.
(K. Riebe; PMViewer)

[avi, 1024×768, 11 MB]
[jpg, 1024×768, 533 KB]

Rotation of M33 at z=0, WDM , at a distance of 64 kpc, orientated face-on.
(K. Riebe; PMViewer)

[avi, 1024×768, 5.7 MB]
[jpg, 1024×768, 530 KB]
Same as before, but with red-green-blue color table.
(K. Riebe; PMViewer)

[avi, 1024×768, 7.0 MB]
[jpg, 1024×768, 525 KB]
Rotation of MW at z=0, CDM, at a distance of 64 kpc, orientated face-on.
(K. Riebe; PMViewer)

[avi, 1024×768, 8.8 MB]
[jpg, 1024×768, 301 KB]

Rotation of MW at z=0, WDM , at a distance of 64 kpc, orientated face-on.
(K. Riebe; PMViewer)

[avi, 1024×768, 13 MB]
[jpg, 1024×768, 656 KB]

Evolution of M33, dark matter density, CDM, camera distance is 190 kpc. Oriented such, that the gas disk (if it was shown here) would be face-on at z=0 (same orientation as corresponding gas/stars movies above/below). The image shows a region of about 200 kpc/h around the center (see image below for the scale).
(K. Riebe; PMViewer)

[avi, 1024×768, 12 MB]
snapshot z=1.071 [jpg, 1024×768, 573 KB]
snapshot z=0 [jpg, 1024×768, 600 KB]
snapshot with scale, z=0 [jpg, 1024×768, 622 KB]

Evolution of M33, dark matter density, WDM , camera distance is 190 kpc/h. Oriented such, that the gas disk (if shown here) would be face-on at z=0 (same orientation and region as corresponding gas/stars movies above/below).
(K. Riebe; PMViewer)

[avi, 1024×768, 12 MB]
snapshot z=1.071 [jpg, 1024×768, 518 KB]
snapshot z=0.0 [jpg, 1024×768, 520 KB]
snapshot with scale, z=0.0 [jpg, 1024×768, 544 KB]

Evolution of M33, CDM, gas density; camera distance is 3 times farther away than for rotation (190 kpc/h). The camera is orientated such that the galaxy is seen face-on at redshift z=0. The region is about 200 kpc/h.
(K. Riebe; PMViewer)

[avi, 1024×768, 11 MB]
snapshot z=1.071 [jpg, 1024×768, 414 KB]
snapshot z=0 [jpg, 1024×768, 517 KB]
snapshot with scale, z=0 [jpg, 1024×768, 538 KB]

Evolution of M33, WDM , gas density; camera distance is 3 times farther away than for rotation (190 kpc). The camera is orientated such that the galaxy is seen face-on at redshift z=0.
(K. Riebe; PMViewer)

[avi, 1024×768, 8.7 MB]
snapshot z=1.071 [jpg, 1024×768, 407 KB]
snapshot z=0 [jpg, 1024×768, 467 KB]
snapshot with scale, z=0 [jpg, 1024×768, 486 KB]

Evolution of M33, CDM, stellar density; same orientation and view as for corresponding gas movie above. The region covers about 200 kpc/h.
(K. Riebe; PMViewer)

[avi, 1024×768, 6.2 MB]
snapshot z=0 [jpg, 1024×768, 201 KB]
snapshot z=1.071 [jpg, 1024×768, 287 KB]
snapshot with scale, z=0 [jpg, 1024×768, 209 KB]

Evolution of M33, WDM , stellar density; same orientation and view as for corresponding gas movie (WDM).
(K. Riebe; PMViewer)

[avi, 1024×768, 3.3 MB]
snapshot z=0 [jpg, 1024×768, 102 KB]
snapshot z=1.071 [jpg, 1024×768, 155 KB]
snapshot with scale, z=0 [jpg, 1024×768, 107 KB]

Evolution of M33, CDM, gas density and stellar density shown in two panels, side-by-side; same orientation and view as for corresponding gas/stars movies.
(K. Riebe; PMViewer)

[avi, 1280×720, 11 MB]
snapshot z=0 [jpg, 1280×720, 538 KB]
snapshot z=1.071 [jpg, 1280×720, 200 KB]

Evolution of M33, WDM , gas density and stellar density shown in two panels, side-by-side; same orientation and view as for corresponding gas/stars movies (WDM).
(K. Riebe; PMViewer)

[avi, 1280×720, 8.5 MB]
snapshot z=0 [jpg, 1280×720, 420 KB]
snapshot z=1.071 [jpg, 1280×720, 471 KB]

Evolution of M33 – everything combined. The upper rows shows the evolution of dark matter, gas and stellar density for the CDM simulation, the lower row shows the corresponding WDM version.
(K. Riebe; PMViewer)

[avi, 1280×960, 12 MB]
snapshot z=1.071 [jpg, 1280×960, 957 KB]
snapshot z=0 [jpg, 1280×960, 934 KB]