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Wrinkles in the Galaxy rather than in time
Martn Lopez-Corredoira
Instituto de Astrofsica de Canarias. SPAIN
New calculations of the Galactic contribution to microwave back-
ground radiation anisotropies are carried out and a probable
Galactic predominance over cosmological signals at large scales
is explored for these frequencies When we take into account a
frequency-dependent contrast of molecular cloud with respect to
the Galactic background of the diuse interstellar medium, the
anisotropic amplitude produced by Galactic dust is of the same
order as that of the data from the observations. The frequency
independence of anisotropies in the microwave range is not neces-
sarily an argument against the Galactic predominance if we take
into account an aditional rotational dust emission, for instance.
This provides a basis for questioning the validity attributing a
cosmological rather than a local origin for the greater part of the
microwave background radiation anisotropies. Moreover, there is
another strong evidence, which solves the question in favour of a
Galactic predominance, to be shown in the conference.
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