Main Belt Comets (MBCs) are objects of the main belt with observed sporadic cometary-like activity (Hsieh and Jewitt 2006, Science, 312, 561). The study of...
Are dark gaps in barred galaxies a signature of bar corotation?
Stellar bars in galaxies induce morphological features, such as rings, through their resonances. Previous studies suggested that the presence of 'dark-gaps'...
Are Microstructures in the Outer Shells of PNe Fossil Condensations of the AGB Wind?
Some planetary nebulae (PNe) show microstructures of low ionization located in their outer regions, i.e. external to the bright rim defined by the fast vs. slow...
We have observed a sample of "ordinary" quasars, selected only on the grounds of their relative brightness in the visible, with the Turku Photopolarimeter on...
Are radio-loud Broad Absorption Line Quasars young sources?
Studying Broad Absorption Line Quasars (BAL QSOs) is interesting because they probe the physics of the AGN environment, and because AGN outflows are important...