Dipole Anisotropy in the COBE Differential Microwave Radiometers First-Year Sky Maps

Abstract

view Abstract Citations (374) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dipole Anisotropy in the COBE Differential Microwave Radiometers First-Year Sky Maps Kogut, A. ; Lineweaver, C. ; Smoot, G. F. ; Bennett, C. L. ; Banday, A. ; Boggess, N. W. ; Cheng, E. S. ; de Amici, G. ; Fixsen, D. J. ; Hinshaw, G. ; Jackson, P. D. ; Janssen, M. ; Keegstra, P. ; Loewenstein, K. ; Lubin, P. ; Mather, J. C. ; Tenorio, L. ; Weiss, R. ; Wilkinson, D. T. ; Wright, E. L. Abstract 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 (lII, bII) = (264°.4±0°.3, 48°.4±0°.5). The implied velocity of the Local Group with respect to the CMB rest frame is υLG = 627±22 km s-1 toward (lII, bII) = (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 T0 at 31.5, 53, and 90 GHz, T0 = 2.75±0.05 K. Publication: The Astrophysical Journal Pub Date: December 1993 DOI: 10.1086/173453 arXiv: arXiv:astro-ph/9312056 Bibcode: 1993ApJ...419....1K Keywords: COSMOLOGY: COSMIC MICROWAVE BACKGROUND; COSMOLOGY: OBSERVATIONS; Astrophysics E-Print: Post Script (4 figures) Ap J 419, 1-6 (1993) full text sources arXiv | ADS | data products SIMBAD (1)