Spectroscopic orbits of nearby solar-type dwarfs. II

TL;DR

This study determines spectroscopic orbits for 15 nearby solar-type dwarf binaries, confirms and updates previous orbits, and provides radial velocities for additional stars, enhancing understanding of their orbital characteristics and multiplicity.

Contribution

First orbital elements for 15 binaries are presented, and existing orbits are confirmed and refined, expanding knowledge of nearby solar-type dwarf systems.

Findings

Orbital periods range from 2 days to 4 years.

8 hierarchical systems with additional companions identified.

Updated orbital parameters and component masses for specific systems.

Abstract

Several nearby solar-type dwarfs with variable radial velocity were monitored to find their spectroscopic orbits. First orbital elements of 15 binaries (HIP 12144, 17895, 27970, 32329, 38636, 39072, 40479, 43004, 73700, 79234, 84696, 92140, 88656, 104514, and 112222) are determined. The previously known orbits of HIP 5276, 21443, 28678, and 41214 are confirmed and updated. The orbital periods range from 2 days to 4 years. There are 8 hierarchical systems with additional distant companions among those 19 stars. The outer visual orbit of the triple system HIP 17895 is updated and the masses of all its components are estimated. We provide radial velocities of another 16 Hipparcos stars without orbital solutions, some of those with long periods or false claims of variability.