A kinematic study of K-type stars |
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| Institution: | 1. Center for Atmospheric Science, Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Andhra Pradesh 522302, India;2. CSIR-Fourth Paradigm Institute (CSIR-4PI), Bangalore 560037, India;1. Department of Physics, Ben-Gurion University, Beer-Sheva 84105, Israel;2. Department of Physics, National Tsing-Hua University, Hsin-Chu 30013, Taiwan;3. Laboratoire d’Astrophysique de Marseille, Université de Provence, Marseille Cedex 13, France;1. College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China;2. National Beef Cattle Improvement Centre, Yangling, Shaanxi 712100, China |
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| Abstract: | Recently available radial velocity data of K-stars are used for an analysis of their kinematics in the solar neighbourhood. Solution for the mean solar motion is u0 = −9.1 ± 2.2, v0 = −20.4 ± 2.6, w0 = −5.2 ± 2.5 km/s, in fair agreement with previous determinations. Another solution using proper motions from the SAO Catalogue shows no significant differences. After dividing the stars into groups according to their w-velocities, it was found that the younger disk stars have an outward (away from the Galactic centre) motion of about 7 km/s relative to the older disk stars. Also, the mean solar motion found for these nearby K-stars appears to be consistent with the kinematics of the Gould's Belt. |
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