The Taiwan Oscillation Network (TON) is a ground-based network to measure solar intensity oscillations to study the internal structure of the Sun. K-line full-disk images of 1000 pixels diameter are taken at a rate of one image per minute. Such data would provide information onp-modes withl as high as 1000. The TON will consist of six identical

A study is presented on the spectroscopic properties of a sample of star- forming dwarf galaxies in extreme density environments, as part of an ongoing project intended to evaluate the influence of the environment on the evolution of dwarf galaxies. Subsets of dwarf galaxies in nearby voids, and in the field of the local supercluster have been

A new method of representing star count data is shown which has the advantage over traditional methods of giving clear insights into the luminosity functions and density distributions of certain stellar components of the Galaxy. When this method is applied to data from the Two-Micron Galactic Survey (TMGS) it is seen that the luminosity function of

We have recently introduced a new algorithm, the implicit integral method (IIM), for solving radiative transfer problems in which the specific source functions (for each frequency and direction) depend linearly on the radiation field via a single quantity which is independent of both frequency and direction. We define this kind of relationship as

We present the first light curves in the infrared j and K filters, obtained in different runs during 1990, 1991, and 1994. The solutions of these IR light curves together with the previous determinations, gathered from visual light curves and spectroscopic studies, finally yield stellar parameters that can be accepted with confidence. The study of

Optical spectroscopy of the highly collimated bipolar nebulae He 2-25, Th 2-B and 19W32 is presented. He 2-25 and Th 2-B are found to have very dense (N_e~10^7 cm^-3) cores characterized by emission lines of low- to intermediate-ionization species, including rich [FeII] emission. The Hα profiles present broad non-Gaussian wings. These spectral