The adhesion model as a field theory for cosmological clustering
The adhesion model has been proposed in the past as an improvement of the Zel'dovich approximation, providing a good description of the formation of the cosmic web. We recast the model as a field theory for cosmological large scale structure, adding a stochastic force to account for power gener...
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| Main Author: | |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
January 9, 2015
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| In: |
Journal of cosmology and astroparticle physics
Year: 2015, Issue: 1, Pages: 1-14 |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2015/01/014 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1475-7516/2015/01/014
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| Author Notes: | Gerasimos Rigopoulos (Institut fur Theoretische Physik, Universitat Heidelberg) |
| Summary: | The adhesion model has been proposed in the past as an improvement of the Zel'dovich approximation, providing a good description of the formation of the cosmic web. We recast the model as a field theory for cosmological large scale structure, adding a stochastic force to account for power generated from very short, highly non-linear scales that is uncorrelated with the initial power spectrum. The dynamics of this Stochastic Adhesion Model (SAM) is reminiscent of the well known Kardar-Parisi-Zhang equation with the difference that the viscosity and the noise spectrum are time dependent. Choosing the viscosity proportional to the growth factor D restricts the form of noise spectrum through a 1-loop renormalization argument. For this choice, the SAM field theory is renormalizable to one loop. We comment on the suitability of this model for describing the non-linear regime of the CDM power spectrum and its utility as a relatively simple approach to cosmological clustering. |
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| Item Description: | Gesehen am 18.06.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2015/01/014 |