Spectroscopic orbits of subsystems in multiple stars. VIII

Abstract

Periods, eccentricities, and masses in hierarchical stellar systems inform us on the formation and early evolution of these fascinating objects. To complement the multiplicity statistics of nearby solar-type stars, 19 new spectroscopic orbits of inner subsystems in 15 hierarchies (10 triples and 5 quadruples) are determined based on high-resolution echelle spectra collected during several years. While previous papers of this series contained mostly short-period orbits, here most periods are on the order of a year. The main components of these hierarchies are HIP 7852, 9148, 12548, 21079, 24320, 27970, 34212, 56282, 57860, 76400, 76816, 81394, 96284, 100420, and HD 108938. Noteworthy systems are HIP 12548 and 24230 (hierarchies of 2+2 architecture with low-mass spectroscopic secondaries), HIP 56282 (a planetary-type 3+1 hierarchy), and HIP 27970 (a compact triple with periods of 15 and 1049 days).

arXiv commentAccepted bh The Astronomical Journal. 16 pages, 18 figures, 6 tables

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Cited by in corpus (4)

• Speckle Interferometry at SOAR in 2021
• Spectroscopic Orbits of Subsystems in Multiple Stars. X (Summary)
• Exploring Thousands of Nearby Hierarchical Systems with Gaia and Speckle Interferometry
• Orbital parallax of binary systems compared to GAIA DR3 and the parallax zero-point offset at bright magnitudes