Methods for deriving the magnetic field in solar (radio) active regions

In the present paper, in terms of the theory about the mechanisms of radio radiation, we have briefly classified, induced, summarized and reviewed the methods for deriving the magnetic field in the solar (radio) active regions. This revised version was published online in July 2006 with corrections to the Cover Date. This revised version was published online in July 2006 with corrections to the Cover Date.     

Decametric survey of discrete sources in the northern sky

This paper presents results and describes the improved data processing algorithm of the low frequency sky survey of discrete sources carried out with the UTR-2 radio telescope. The measurements were conducted within the frequency range 10 to25 MHz. Coordinates and flux densities of the sources detected were obtained. Identification with sources from the 4C survey has been done. The resulting catalogue contains parameter estimates for 483 sources on a set of frequencies within the UTR-2 range. This revised version was published online in July 2006 with corrections to the Cover Date. This revised version was published online in July 2006 with corrections to the Cover Date.     

Field Stars and Star Clusters in M31

This review reports on recent results obtained from HST/WFPC2 high resolution observations of field stars and star clusters in the bulge and the halo of the nearby galaxy M31. This revised version was published online in July 2006 with corrections to the Cover Date.     

Distance Scales After Hipparcos

A general review is given of the use of Hipparcos data to calibrate basic distance indicators. This revised version was published online in July 2006 with corrections to the Cover Date.     

Dwarf galaxies in Clusters

The equilibrium of a self gravitating cylindrical polytrope with a general magnetic field and rotation has been discussed. This revised version was published online in July 2006 with corrections to the Cover Date.     

Shock Waves, Turbulence and Line Broadening Phenomena in RR Lyrae

Recent results based on high resolution spectral observations of RR Lyrae are presented. They mainly concern the effects of the propagation of strong shock waves in the atmosphere. This revised version was published online in July 2006 with corrections to the Cover Date.     

Determining Field Correlations Produced by Stars from the Study of Spectral Changes in Double Slit Experiment

Experiments are performed to determine the coherence properties of wave fields, produced by the broadband stellar sources on the earth surface, from the study of spectral changes produced on interference in the Young's double slit experiment. The spectral degree of coherence obtained experimentally in this study for four bright stars in the wavelength range from 325 nm to 660 nm is in close agreement with the value that is expected theoretically from the known angular diameter of the stars. It is shown that the spectral degree of coherence obtained experimentally by this spectral interferometric technique could be used to determine the angular diameter of stars. This revised version was published online in July 2006 with corrections to the Cover Date. This revised version was published online in July 2006 with corrections to the Cover Date.     

Chemo–Dynamical Effects of Bars in Galactic Evolution

Some effects of a bar on stellar orbits and on chemical gradients are presented for spiral galaxies in general and for the Solar Neighborhood in particular. This revised version was published online in July 2006 with corrections to the Cover Date.     

A Model of The 2–4 μm Spectrum of Comet Halley

Recent observations of Halley's Comet show a broad absorption band centred at 3.4 μm and which can be explained on the basis of a bacterial grain model. This revised version was published online in July 2006 with corrections to the Cover Date.     

General relativistic study of perfect fluid disk in linearised kerr geometry

In this chapter we present a detailed general relativistic formulation for the study of structure of perfect fluid disk rotating around Kerr black hole. This revised version was published online in July 2006 with corrections to the Cover Date.     

Radio Pulsars – What is to be Done

In this review I discuss briefly the main theoretical problems concerning radio pulsars and formulate the observations aimed at a verification of the current models of pulsar magnetosphere and the radio emission mechanism. This revised version was published online in July 2006 with corrections to the Cover Date.     

GSC 45401533: Observations and Analysis of a NewlyDiscovered Binary Star

R observations of a newly discovered binary GSC 4540_1533 are presented. Analysis of the light curve with the Wilson-Devinney program indicates that the system is detached and consist of 2 main sequence stars. This revised version was published online in July 2006 with corrections to the Cover Date.     

IPS Observations at Miyun Station, BAO

IPS observations have recently begun at Miyun Station, Beijing Astronomical Observatory. This paper briefly describes the radio telescope at Miyun Station, discusses the observation and the data reduction procedures, and presents the preliminary results of observations on IPS source 3C48. This revised version was published online in July 2006 with corrections to the Cover Date.     

Multiwavelength Optical Observations of Chromospherically Active Binary Systems

We summarize here our ongoing project of multiwavelength optical observations aimed at studying the chromosphere of active binary systems, using the information provided for several optical spectroscopic features, that are formed at different heights in the chromosphere. This revised version was published online in July 2006 with corrections to the Cover Date.     

Variable Speed of Light Theories

Two variable speed of light models and their physical consequences are investigated. This revised version was published online in July 2006 with corrections to the Cover Date.     

Radio Observations of Ions in Comet Hale-Bopp

We present radio observations of HCO⁺, H₃O⁺ and CO⁺ in Hale-Bopp. This revised version was published online in July 2006 with corrections to the Cover Date.     

X-ray Spectroscopy of Active Stars with ASCA and BeppoSAX

We discuss representative cases of X-ray spectra of active stars obtained with ASCA and BeppoSAX. We focus in particular on our own observations of the RS CVn binaries γ And and UX Ari, of the BY Dra eclipsing binary HD9770, and of the young stars AB Dor and HD35850. This revised version was published online in July 2006 with corrections to the Cover Date.     

Constraining Theoretical Models with Astronomical and Geophysical Bounds

We consider astronomical and geophysical bounds in order to test Kaluza-Klein like models and some particular models of Bekenstein's theory. Bounds on the free parameteres of the theories are obtained. This revised version was published online in July 2006 with corrections to the Cover Date.     

Irregular Behavior in the Light Variations of 29 Cyg

After reviewing the general observational properties of the Lambda Bootis star 29 Cygni, we study samples of its light curve and apply the phase space and FFT tools to investigate the nature of its light curve irregularities. This revised version was published online in July 2006 with corrections to the Cover Date.     

Formation of Galaxies in a Hierarchical Clustering Model

We present results on the formation and evolution of galaxy-like objects in hydrodynamical cosmological simulations. This revised version was published online in July 2006 with corrections to the Cover Date.