Search for Kinematic Siblings of the Sun Based on Data from the XHIP Catalog

Abstract

From the XHIP catalogue, we have selected 1872 F-G-K stars with relative parallax measurement errors <20% and absolute values of their space velocities relative to the Sun <15 km/s. For all these stars, we have constructed their Galactic orbits for 4.5 Gyr into the past using an axisymmetric Galactic potential model with allowance made for the perturbations from the spiral density wave. Parameters of the encounter with the solar orbit have been calculated for each orbit. We have detected three new stars whose Galactic orbits were close to the solar one during a long time interval in the past. These stars are HIP 43852, HIP 104047, and HIP 112158. The spectroscopic binary HIP 112158 is poorly suited for the role of a kinematic sibling of the Sun by its age and spectroscopic characteristics. For the single star HIP 43852 and the multiple system HIP 104047, this role is quite possible. We have also confirmed the status of our previously found candidates for close encounters, HIP 47399 and HIP 87382. The star HIP 87382 with a chemical composition very close to the solar one is currently the most likely candidate, because it persistently shows close encounters with the Sun on time scales of more than 3 Gyr when using various Galactic potential models both without and with allowance made for the influence of the spiral density wave.

arXiv comment11 pages, 1 table, 3 figures

References in corpus (26)

• Validation of the new Hipparcos reduction
• Local Kinematics and the Local Standard of Rest
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
• SB9: The Ninth Catalogue of Spectroscopic Binary Orbits
• Late-type stars members of young stellar kinematic groups - I. Single stars
• Pulkovo Compilation of Radial Velocities for 35495 Hipparcos Stars in a Common System
• The Origin of the Bifurcation in the Sagittarius Stream
• XHIP: An Extended Hipparcos Compilation
• Comparative statistics and origin of triple and quadruple stars
• The Long-term Evolution of the Galactic Disk Traced by Dissolving Star Clusters
• A New Model for the Spiral Structure of the Galaxy. Superposition of 2+4-armed patterns
• On the kinematic evolution of young local associations and the Sco-Cen complex
• The lost siblings of the Sun
• Early evolution of the birth cluster of the solar system
• Displacement of the Sun from the Galactic Plane
• The Milky Way Spiral Structure Parameters from Data on Masers and Selected Open Clusters
• Galactic Parameters from Masers with Trigonometric Parallaxes
• Galaxy Genesis -- unravelling the epoch of dissipation in the early disk
• Galactic Rotation Curve and Spiral Density Wave Parameters from 73 Masers
• Is it possible to reveal the lost siblings of the Sun?
• Estimation of the Galactic Spiral Pattern Speed from Cepheids
• The Quest for the Sun's Siblings: an Exploratory Search in the Hipparcos Catalogue
• Galactic Kinematics from a Sample of Young Massive Stars
• Galactic Kinematics from OB3 Stars with Distances determined from Interstellar Ca II Lines
• Searching for Possible Siblings of the Sun from a Common Cluster based on Stellar Space Velocities

Cited by in corpus (3)

• Global survey of star clusters in the Milky Way IV. 63 new open clusters detected by proper motions
• Cradle(s) of the Sun
• The AMBRE Project: searching for the closest solar siblings