For the eclipsing binary system CM Draconis, eclipse minimum times have been monitored with high precision between 1994 and 1999. Periodic deviations of minimum times from a linear ephemeris may indicate the presence of an orbiting third body. Individual measurements of 41 eclipse minimum times result in a standard deviation from linear ephemeris

In this work, we have linked our evolutionary synthesis models, covering the entire spectral range from radio to X-rays, with photoioniztion codes in order to investigate the effects of the X-ray emission from starburst galaxies on the optical emission lines.

IAUC 7423 available at Central Bureau for Astronomical Telegrams.

IAUC 7429 available at Central Bureau for Astronomical Telegrams.

We present preliminary analyses of Stokes [I, Q, U, V] spectra of a sunspot penumbra using two different analysis/inversion procedures. It has long been known that the Stokes spectra from sunspot penumbrae, even at disk center, commonly show multiple lobes and asymmetries. Hence, the magnetic/thermodynamic maps obtained from Stokes spectra using

The spatial distribution of stellar populations, the star formation history, and other properties of the dwarf irregular (dIrr) galaxy DDO 190 have been analyzed using color-magnitude diagrams of about 3900 resolved stars and the Hα fluxes of H II regions. From the mean color index of the red giant branch (RGB), a mean metallicity [Fe/H]=-2.0 is