Does ADS 9346 have a low-mass companion?

Abstract

Based on the photographic and the CCD observations of the relative motion of A, B components of the binary system ADS~9346 obtained with the 26-inch refractor of the Pulkovo Observatory during 1979-2019, we discover an invisible companion associated with the A-star. Comparison of the ephemerides with the positional and the spectroscopic observations allowed us to calculate the preliminary orbit of the photocenter ($P=15$ years). The minimal mass of the companion is approximately $0.13M_{\odot }$. The existence of the invisible low-mass companion is implied by the IR-excess based on the IRAS data. To confirm this, additional observations of the radial velocity near the periastron need to be carried out.

arXiv commentThe paper is accepted in RAA

References in corpus (10)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Validation of the new Hipparcos reduction
• The Optical to Mid-Infrared Extinction Law Based on the APOGEE, Gaia DR2, Pan-STARRS1, SDSS, APASS, 2MASS and WISE Surveys
• Stellar and substellar companions of nearby stars from Gaia DR2 - Binarity from proper motion anomaly
• Debris disks in main sequence binary systems
• The astrometric core solution for the Gaia mission. Overview of models, algorithms and software implementation
• Multiplicity in Early Stellar Evolution
• The Penn State - Toruń Centre for Astronomy Planet Search stars IV. Dwarfs and the complete sample