Interpretation of the cosmic microwave background radiation anisotropy detected by the COBE Differential Microwave Radiometer

Journal Article · Tue Sep 01 00:00:00 EDT 1992 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/186506· OSTI ID:7159126

Wright, E L; Meyer, S S; Bennett, C L; Boggess, N W; Cheng, E S; Hauser, M G; Kogut, A; Lineweaver, C; Mather, J C; Smoot, G F ^[1]

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1. California, University, Los Angeles (United States) MIT, Cambridge, MA (United States) NASA, Goddard Space Flight Center, Greenbelt, MD (United States) Universities Space Research Association, Boulder, CO (United States) Lawrence Berkeley Laboratory, CA (United States) California, University, Berkeley (United States)

The large-scale cosmic background anisotropy detected by the COBE Differential Microwave Radiometer (DMR) instrument is compared to the sensitive previous measurements on various angular scales, and to the predictions of a wide variety of models of structure formation driven by gravitational instability. The observed anisotropy is consistent with all previously measured upper limits and with a number of dynamical models of structure formation. For example, the data agree with an unbiased cold dark matter (CDM) model with H0 = 50 km/s Mpc and Delta-M/M = 1 in a 16 Mpc radius sphere. Other models, such as CDM plus massive neutrinos (hot dark matter (HDM)), or CDM with a nonzero cosmological constant are also consistent with the COBE detection and can provide the extra power seen on 5-10,000 km/s scales. 39 refs.

• OSTI ID: 7159126
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 396:1; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
COMPARATIVE EVALUATIONS
COSMOLOGICAL MODELS
ELECTROMAGNETIC RADIATION
EVALUATION
GALAXY CLUSTERS
GRAVITATIONAL FIELDS
GRAVITATIONAL INSTABILITY
INSTABILITY
MATHEMATICAL MODELS
MATTER
MEASURING INSTRUMENTS
MICROWAVE RADIATION
NONLUMINOUS MATTER
PLASMA INSTABILITY
RADIATION DETECTORS
RADIATIONS
RADIOMETERS
RELICT RADIATION
SATELLITES