An observational test of the binary hypothesis for the origin of blue straggler stars is conducted by searching for radial velocity variables among 30 blue stragglers in several galactic clusters. Only one of the slowly rotating blue stragglers is detected as a radial velocity variable, and it is shown that this finding does not correspond to the

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