Cosmography and Data Visualization

Abstract : Cosmography, the study and making of maps of the universe or cosmos, is a field where visual representation benefits from modern three-dimensional visualization techniques and media. At the extragalactic distance scales, visualization is contributing in understanding the complex structure of the local universe, in terms of spatial distribution and flows of galaxies and dark matter. In this paper, we report advances in the field of extragalactic cosmography obtained using the SDvision visualization software in the context of the Cosmicflows Project. Here, multiple visualization techniques are applied to a variety of data products: catalogs of galaxy positions and galaxy peculiar velocities, reconstructed velocity field, density field, gravitational potential field, velocity shear tensor viewed in terms of its eigenvalues and eigenvectors, envelope surfaces enclosing basins of attraction. These visualizations, implemented as high-resolution images, videos, and interactive viewers, have contributed to a number of studies: the cosmography of the local part of the universe, the nature of the Great Attractor, the discovery of the boundaries of our home supercluster of galaxies Laniakea, the mapping of the cosmic web, the study of attractors and repellers.
Type de document :
Pré-publication, Document de travail
Accepted for publication in the PASP Special Focus Issue: Techniques and Methods for Astrophysica.. 2017
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http://hal.in2p3.fr/in2p3-01468464
Contributeur : Sylvie Flores <>
Soumis le : mercredi 15 février 2017 - 15:02:58
Dernière modification le : mardi 16 janvier 2018 - 15:37:58

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  • HAL Id : in2p3-01468464, version 1
  • ARXIV : 1702.01941

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Citation

Daniel Pomarede, Helene M. Courtois, Yehuda Hoffman, R. Brent Tully. Cosmography and Data Visualization. Accepted for publication in the PASP Special Focus Issue: Techniques and Methods for Astrophysica.. 2017. 〈in2p3-01468464〉

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