A time series of broadband images of a sunspot near the disk center was obtained simultaneously in two wavelength bands at 0.56 mu m and 1.55 mu m at the German VTT on June 17, 1998. We computed intensity difference images of the best frame pairs which reveal information about the facular distribution in the present field of view. Faculae are found

Hot subdwarf stars (hot sds) are blue subluminous objects. Only a few determinations are available to date regarding the study of such aspects as rotation, microturbulent velocities or the magnetic nature of these objects. Over 26 sdBs are known to date to be multiperiodic rapid oscillators. This project presents preliminary results of new

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Radioactive 26Al, ejected by massive stars through winds and supernova explosions, leads to γ-ray line emission that can serve as a probe of the interstellar environment in and near young star clusters. The ˜ 1 Myr decay time of 26Al is long enough to allow transport over significant distances, which can cause substantial angular offsets between γ

Stars of solar type and cooler often display dramatic effects of magnetic fields in their atmosphere. These effects vary from relatively placid phenomena such as the dark photospheric spots and plages where there is enhanced emission in ionised calcium and magnesium to the much more energetic flares which erupt over short time scales. All of these