Minimal cosmic background fluctuations implied by streaming motions

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/185046· OSTI ID:5465053

Juszkiewicz, R; Gorski, K; Silk, J

The minimal cosmic background radiation (CBR) anisotropy implied by the presence of peculiar motions of a given amplitude on some specified scale is calculated using a new, power spectrum-independent approach. If the tentative evidence for deviations from the Hubble flow of magnitude delta V/V roughly 0.1 at V roughly 5000 km/s is confirmed, microwave background fluctuations with a coherence scale of about 2 deg and dispersion delta T/T greater than 10 to the -5th are predicted. It is found that the existing upper limits on delta T/T are not inconsistent with v(r) = 500 km/s at r = 50/h Mpc. A reduction of the observational limits on the CBR anisotropy below the authors' minimal predictions for delta T/T would challenge the current interpretation of measurements of deviations from the Hubble flow. Gravitational instability without reheating as a mechanism for generation of the large-scale structure of the universe would be in severe difficulty. 38 references.

• Research Organization: California Univ., Berkeley
• OSTI ID: 5465053
• Journal Information: Astrophys. J.; (United States), Vol. 323
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
RELICT RADIATION
ANISOTROPY
FLUCTUATIONS
LIMITING VALUES
MASS DISTRIBUTION
NONLUMINOUS MATTER
UNIVERSE
DISTRIBUTION
ELECTROMAGNETIC RADIATION
MICROWAVE RADIATION
RADIATIONS
SPATIAL DISTRIBUTION
VARIATIONS
640106* - Astrophysics & Cosmology- Cosmology