We describe the work carried out to obtain observational evidence of a local relation between the temperature and the magnetic field in different regions of several sunspots. Information about the temperature is extracted from the continuum intensity. The magnetic field is deduced by using the Stokes V profile of lines with different excitation

IAUC 5733 available at Central Bureau for Astronomical Telegrams. IAUC 5733 available at Central Bureau for Astronomical Telegrams.

We present results of a five month spectroscopic monitoring campaign of the Seyfert-1 galaxy NGC 3516. Using a new calibration method and applying a correction for seeing differences during the various observations we can scale the spectra to each other with a much higher accuracy than hitherto achieved. NGC 3516 shows large amplitude variations on

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An observational study of large-scale star formation processes in spiral galaxies with well-defined arm systems is presented. Combining new data on the current massive star formation (from H-alpha imaging) and on the total gas distribution (both atomic and molecular hydrogen, from H I and CO observations), the star formation efficiencies in- and