NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Noncosmological signal contributions to the COBE DMR anisotropy mapsWe examine the COBE Differential Microwave Radiometer (DMR) data for evidence of noncosmological source contributions. The DMR maps are cross-correlated with maps of rich clusters, extragalactic IRAS sources, HEAO 1 A-2 X-ray emission, and 5 GHz radio sources. We limit the rms contributions from these sources on a 7 deg angular scale to less than 10 micro-K (95 percent confidence level) in the DMR maps, although the LMC probably contributes about 50 micro-K to a limited region of the sky. Thus, our previous interpretation that the fluctuations in the COBE DMR data are most likely due to cosmic fluctuations at the surface of last scattering remains intact. The Comptonization parameter for hot electrons traced by rich clusters is limited to delta(y) less than 2 x 10 exp -6 (95 percent confidence level) averaged over the 7 deg DMR beam.
Document ID
19930072111
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bennett, C. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hinshaw, G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Banday, A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kogut, A.
(Universities Space Research Association; NASA, Goddard Space Flight Center Greenbelt, MD, United States)
Wright, E. L.
(California Univ. Los Angeles, United States)
Loewenstein, K.
(Hughes STX Corp. Greenbelt, MD, United States)
Cheng, E. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
September 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 414
Issue: 2
ISSN: 0004-637X
Subject Category
Space Radiation
Accession Number
93A56108
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available