Ultralight bosonic dark matter (UBDM) can be described by a classical wave-like field oscillating near the Compton frequency of bosons. If measurement scheme for direct detection UBDM interactions is sensitive to signature quadratic in field, then there near-zero-frequency (dc) component signal. Thus, detector with given finite bandwidth used search bosons frequencies many orders magnitude larg...

We perform maximum likelihood estimates for single and double flavor ultralight dark matter (ULDM) models using the Spitzer Photometry Accurate Rotation Curves database. These are compared to several commonly used cold (CDM) models. By comparing various CDM we find, in agreement with previous studies, that Burkert Einasto tend better than other focus on comparisons between ULDM analyze cases wh...

The evolution of cosmic perturbations in a two-component ultralight axionic universe is investigated. We present the first spectral computation multi-component universes. A particular case composed light extreme axions and free massive particles offers possibility for formation very high-redshift galaxies, which are typically required to host early quasars. Our retains information perturbed vel...