1993/12/01 by A. Kogut, Charles H. Lineweaver, C. Lineweaver +19 · 3 citations
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph
paper · pdf · doi:10.1086/173453
published as Astrophys.J. 419 (1993) 1 · Post Script (4 figures) Ap J 419, 1-6 (1993)
openalex publication_date 1993/12/01 · arxiv created 1993/12/23 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We present a determination of the cosmic microwave background dipole amplitude and direction from the COBE Differential Microwave Radiometers (DMR) first year of data. Data from the six DMR channels are consistent with a Doppler-shifted Planck function of dipole amplitude ΔT = 3.365±0.027 mK toward direction (l<SUP>II</SUP>, b<SUP>II</SUP>) = (264°.4±0°.3, 48°.4±0°.5). The implied velocity of the Local Group with respect to the CMB rest frame is υ<SUB>LG</SUB> = 627±22 km s<SUP>-1</SUP> toward (l<SUP>II</SUP>, b<SUP>II</SUP>) = (276°±3°, 30°±3°). DMR has also mapped the dipole anisotropy resulting from the Earth's orbital motion about the Solar system barycenter, yielding a measurement of the monopole CMB temperature T<SUB>0</SUB> at 31.5, 53, and 90 GHz, T<SUB>0</SUB> = 2.75±0.05 K.