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CosmologicalPerturbation Theoryin the Synchronousand ConformalNewtonian Gauges Chung‐Pei MaEdmund Bertschinger1995 год

Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
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Аннотация: view Abstract Citations (1626) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges Ma, Chung-Pei ; Bertschinger, Edmund Abstract This paper presents a systematic treatment of the linear theory of scalar gravitational perturbations in the synchronous gauge and the conformal Newtonian (or longitudinal) gauge. It differs from others in the literature in that we give, in both gauges, a complete discussion of all particle species that are relevant to any flat cold dark matter (CDM), hot dark matter (HDM), or CDM + HDM models (including a possible cosmological constant). The particles considered include CDM, baryons, photons, massless neutrinos, and massive neutrinos (an HDM candidate), where the CDM and baryons are treated as fluids while a detailed phase-space description is given to the photons and neutrinos. Particular care is applied to the massive neutrino component, which has been either ignored or approximated crudely in previous works. Isentropic initial conditions on superhorizon scales are derived. The coupled, linearized Boltzmann, Einstein, and fluid equations that govern the evolution of the metric and density perturbations are then solved numerically in both gauges for the standard CDM model and two CDM + HDM models with neutrino mass densities Ων = 0.2 and 0.3, assuming a scale-invariant, adiabatic spectrum of primordial fluctuations. We also give the full details of the cosmic microwave background anisotropy, and present the first accurate calculations of the angular power spectra in the two CDM + HDM models including photon polarization, higher neutrino multipole moments, and helium recombination. The numerical programs for both gauges are available at http://arcturus.mit.edu/cosmics. Publication: The Astrophysical Journal Pub Date: December 1995 DOI: 10.1086/176550 arXiv: arXiv:astro-ph/9506072 Bibcode: 1995ApJ...455....7M Keywords: COSMOLOGY: COSMIC MICROWAVE BACKGROUND; COSMOLOGY: THEORY; COSMOLOGY: LARGE-SCALE STRUCTURE OF UNIVERSE; GRAVITATION; COSMOLOGY: DARK MATTER; ELEMENTARY PARTICLES; Astrophysics; High Energy Physics - Phenomenology E-Print: 45 pages, AAS LaTeX v3.0, based in part on astro-ph/9401007 full text sources arXiv | ADS |
Год издания: 1995
Авторы: Chung‐Pei Ma, Edmund Bertschinger
Издательство: IOP Publishing
Источник: The Astrophysical Journal
Ключевые слова: Cosmology and Gravitation Theories, Dark Matter and Cosmic Phenomena, Geophysics and Gravity Measurements
Другие ссылки: The Astrophysical Journal (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
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