Does ADS 9346 have a low-mass companion?
Kiyaeva, Olga V.; Khovritchev, Maxim Yu.; Kulikova, Agrippina M.; Narizhnaya, Natalya V.; Vasilyeva, Tatyana A.; Apetyan, Arina A.
Russia
Abstract
Based on the photographic and CCD observations of the relative motion of the A and B components of the binary system ADS 9346 obtained with the 26-inch refractor of Pulkovo Observatory during 1979-2019, we discover an invisible companion associated with star A. Comparison of the ephemerides with the positional and spectroscopic observations allowed us to calculate the preliminary orbit of the photocenter (P = 15 yr). The minimal mass of the companion is approximately 0.13 M ⊙. The existence of the invisible low-mass companion is implied by the IR-excess based on IRAS data. To confirm this, additional observations of the radial velocity near the periastron need to be carried out.