All of the ten LIGO/Virgo binary black hole (BH-BH) merger detections to date have low values for their effective spins. There are only three potential explanations of this fact. If BH spin magnitudes are large then (i) both BH spin vectors must lie in/near orbital plane or (ii) BH spins are pointing in opposite directions. Or (iii) BH spin magnitudes are small.
Milky Way is a complex system which exploration is hampered due to the presence of interstellar dust and the location of our Sun close to the Galactic plane. I will review the current knowledge on the structure and evolution of the Milky Way based on the most recent results obtained by large surveys.
Galactic molecular outflow plays a key role on galaxies evolution. Galaxies eject molecular gas and energy into the intergalactic medium through galactic outflows. This process affects star formation activities in galaxies. NGC2146 and NGC3628 are two nearby starburst galaxies with kpc-scale X-ray outflows. I will present my recent CO observations on these two galaxies.
The search for DM candidates continues since many years using various types of detectors. Up to now no positive results were obtained with exception of (rather unsure) ones obtained by the DAMA-LIBRA experiment.
