Ultra light bosonic dark matter and CMB.

We report the cosmological effects that a species of Ultra Light Bosonic Dark Matter imprints in the Acoustic Peaks of the CMB and some of its thermic features. We show that the effect of the Bose-Einstein statistics is small albeit perceptible and is equivalent to an increase of non-relativistic matter. It is noted the mass-to-temperature ratio necessary for being still a Dark Matter candidate. It is also needed a non-zero optical depth of Reionization. [ABSTRACT FROM AUTHOR]