Cosmological dispersion, the corrected redshift formula, and large-scale structure

Journal Article · Wed Apr 15 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.2706· OSTI ID:7235646

Hochberg, D; Kephart, T W ^[1]

---

1. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)

We calculate the exact frequency redshift for both massless and massive scalar fields coupled to gravity in Friedmann-Robertson-Walker backgrounds. The exact redshift expression factorizes and is proportional to the naive Doppler shift times a term representing diffractive effects. These diffractive or dispersive corrections can be large for field modes with wavelengths on the order of the horizon size. The corresponding mode amplitudes undergo amplification or deamplification, with respect to conformally coupled scalars, depending on the value of the coupling to gravity. Implications for cosmological density perturbations are discussed.

• DOE Contract Number: FG05-85ER40226
• OSTI ID: 7235646
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 45:8; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
RED SHIFT
COUPLING
DIFFRACTION MODELS
DOPPLER EFFECT
GRAVITATION
HUBBLE EFFECT
MASS
PERTURBATION THEORY
SCALAR FIELDS
UNIVERSE
MATHEMATICAL MODELS
PARTICLE MODELS
662110* - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)