Only 235 entries were processed as astrometric binaries with orbits in the Hipparcos and Tycho Catalogue (ESA 1997). However, the Intermediate Astrometric Data (IAD) and Transit Data (TD) made available by ESA make it possible to re-process the stars that turned out to be spectroscopic binaries after the completion of the Catalogue. This paper illustrates how TD and IAD may be used in conjuncti...

We investigate the dynamical evolution of coplanar hierarchical two-planet systems where the ratio of the orbital semimajor axes α = a1/a2 is small. Hierarchical twoplanet systems are likely to be ubiquitous among extrasolar planetary systems. We show that the orbital parameters obtained from a multiple Kepler fit to the radial velocity variations of a host star are best interpreted as Jacobi c...

Theoretical study of the electronic structure, NonLinear Optical (NLO) properties, and natural bonding orbital (NBO) analysis of 18-crown-6were investigated using Density Functional Theory (DFT) calculations at the B3LYP/6-311G (d,p) level of theory. The optimized structure is a nonlinear compound indicated from the dihedral angles.  Natural bonding orbital analys...

orbital fat adherence syndrome is a known complication of strabismus, orbital and scleral buckling surgery or orbital trauma which induces a restrictive strabismus. in this case presentation we introduce a surgical method of globe slinging using temporalis fascia for correction of restrictive esotropia due to fat adherence syndrome. in our review of literature we found no report of a similar pr...

compound (n,n-bis (salicylidene) 1,2-diaminophenylene) was prepared by condensation of ethanolsolution of 2-hydroxybanzaldehyde and 1,2-diaminophenylene. the compound was characterized by1h nmr, infrared spectroscopy (ft-ir) data and analytical data. the geometrical parameters andenergies have been obtained from density functional theory (dft) b3lyp method and hartree-fock (hf) method with 3-21...

The electronic structure, Non-Linear Optical (NLO) properties and Natural Bonding Orbital (NBO) analysis of 1,4-dioxane were investigated using the theoretical study of Density Functional Theory (DFT) calculations at the B3LYP/6-311G (d,p) level of theory. The optimized structure is nonlinear as indicated from the dihedral angles.  Natural bonding orbital analysis has been analyzed in terms...

The superconducting order parameter of strontium ruthenate is the center a lasting puzzle calling for theoretical studies that include seldom-considered effects spin-orbit coupling and frequency-dependence parameters. Here we generalize frequency-dependent theory superconductivity mediated by spin charge fluctuations to in multi-orbital systems characterize states using spin-parity-orbital-time...