| |
 |
| Paper: |
Cosmography with SDvision |
| Volume: |
485, Astronomical Data Analysis Software and Systems XXIII |
| Page: |
261 |
| Authors: |
Pomaréde, D.; Courtois, H.; Hoffman, Y.; Tully, R. B. |
| Abstract: |
Cosmography is the science of building maps of the Universe. Using the
SDvision 3D visualization software developed within the framework of IDL
Object Graphics, we have established a cosmography of the Local
Universe, based on multiple data products from the Cosmic Flows
Project. These data include of redshifts, catalogs of peculiar
velocities, and reconstructed density and velocity fields. On the basis
of the various visualization techniques offered by the SDvision
software, we have created maps displaying the structure of the Local
Universe where the most prominent features such as voids, clusters of
galaxies, filaments and walls, are identified and named. Maps also
display the dynamical information of the cosmic flows, which are the
bulk motions of galaxies, of gravitational origin. These maps highlight
peculiar conformations in the cosmic flows such as the streaming along
filaments, or the existence of local attractors. This cosmography is
used for visual comparisons between known, luminous structures, and the
structures inferred from the reconstruction of the (mostly dark) density
field at the origin of the bulk motions. |
|
|
|
|
|
