Affiliation:
1. Physics Department Northern Border University, Faculty of Science and Arts Turaif Turaif Branch Saudi Arabia
2. Astronomy Department National Research Institute of Astronomy and Geophysics (NRIAG) Helwan, Cairo Egypt
3. Mathematics Department, Faculty of Science University of Tabouk Tabouk Saudi Arabia
Abstract
AbstractThe study reports velocity ellipsoid parameters including the kinematical properties of K dwarf stars. Herein, two samples of K dwarf stars are presented with the solar neighborhood ( pc) for high (; 106 points) and low galactic latitudes (; 199 points). We calculated spatial velocities (, , and ; km s) along the galactic coordinates and the velocity dispersion (, , ; km s), the vertex longitude (), which have often differed significantly from zero like many of our analyses, i.e., (; 106 points) and (; 199 points). Moreover, we computed the solar motion, i.e., km s, and other solar elements (e.g., , , , and ). Finally, we estimated Oort's constants, i.e., km s kpc and ‐ km s kpc, both indicating that the rotational velocity was km s.
Subject
Space and Planetary Science,Astronomy and Astrophysics