The physical parameters of Tau Cet are analyzed based on new and high-quality data. The effective temperature is determined to be 5250 + or - 50 K. The discrepancy of the abundance inferred from the Fe I lines with the lowest excitation cannot be explained by errors either in atomic or stellar parameters and implies the need for models

IAUC 4739 available at Central Bureau for Astronomical Telegrams. IAUC 4739 available at Central Bureau for Astronomical Telegrams. IAUC 4739 available at Central Bureau for Astronomical Telegrams.

IAUC 4717 available at Central Bureau for Astronomical Telegrams.

IAUC 4717 available at Central Bureau for Astronomical Telegrams.

Data on the solar p modes observed simultaneously in the solar NaI and KI absorption lines were obtained in 1985 by operating two independent resonant scattering spectrometers at the same site (Observatorio del Teide, Tenerife). Since the abundances of the ground state atoms of these two elements are not the same, different depths of the solar

The simulated annealing algorithm for phase retrieval has been applied in image reconstruction from low-light level stellar speckle interferometry (SSI) data. A realistic computer simulation of photon-limited SSI has been performed, successfully obtaining a reconstructed image. The algorithm has been shown to be robust and able to give good