Does ADS 9346 have a low-mass companion?
O.V. Kiyaeva (1), M.Yu. Khovritchev (1), A.M. Kulikova (1), N.V., Narizhnaya (1), T.A. Vasilyeva (1), A.A. Apetyan (1). ((1) Central, Astronomical Observatory, Russian Academy of Sciences, St. Petersburg,, Russia)
TL;DR
This study uses 40 years of observational data to identify a low-mass, invisible companion orbiting the A-star in binary system ADS 9346, suggesting a 15-year orbit and a minimal mass of about 0.13 solar masses.
Contribution
It provides the first evidence of an invisible low-mass companion in ADS 9346 through combined astrometric and spectroscopic analysis, and estimates its orbit and mass.
Findings
Discovery of an invisible companion with ~0.13 M_sun
Preliminary orbit with a 15-year period
IR-excess supports the companion's existence
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 ( years). The minimal mass of the companion is approximately . 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.
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