Multi-component dark matter scenarios are studied in the model with $U(1)_X$ gauge symmetry that is broken into its product subgroup $Z_2 \times Z_3$ \'{a} la Krauss-Wilczek mechanism. In this setup, there exist two types of fields, $X$ and $Y$, distinguished by different charges. The real imaginary parts $Z_2$-charged field, $X_R$ $X_I$, get masses from breaking. field which another candidate ...

The in-orbit results and lessons learned of the first Finnish satellite Aalto-1 are briefly presented in this paper. Aalto-1, a three-unit CubeSat which was launched June 2017, performed AaSI (Aalto Spectral Imager), Radiation Monitor (RADMON), Electrostatic Plasma Brake (EPB) missions. partly fulfilled its mission objectives allowed to either perform or attempt experiments. Although attitude c...

The narrow-line Seyfert 1 galaxy I Zwicky shows a unique and complex system of ionised gas in outflow, which consists an ultra-fast wind two-component warm absorber. In the last two decades, XMM-Newton monitored source multiple times enabling study long-term variability various outflows. Plasma photoionisation equilibrium with ionising responds varies accordingly to any change luminosity. Howev...