Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...384l...1b&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 384, Jan. 1, 1992, p. L1-L3. Research supported by MURST and EEC.
Astronomy and Astrophysics
Astrophysics
5
Background Radiation, Cosmology, Dipoles, Microwaves, Quadrupoles, Universe, Aberration, Anisotropy, Cosmic Background Explorer Satellite, Microwave Radiometers
Scientific paper
The possibility of investigating the nature of the dipole anisotropy by means of measurements of the quadrupole component due to the light aberration effect is discussed. The aberration term is of the order of approximately 1.2-1.6 x 10 exp -6 (thermodynamic temperature fluctuations), which is close to the expected final sensitivity of the HF channel of the differential microwave radiometer of the COBE satellite (COBE-DMR); this term represents about 85 percent of the total quadrupole. Because of the relevance of the effect, it is suggested that the observing time of COBE be increased beyond the already scheduled duration of 2 yr. It is concluded that COBE has the potential to determine the true nature of the dipole anisotropy.
Bottani Samuele
de Bernardis Paolo
Melchiorri Francesco
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