Low mass stellar companions around four giant stars

• Three low-mass mass companions found around four intermediate-mass giants.
• The stellar parameters of HD1695, HD120235, HD145316 and HD200004 were derived.
• The orbital parameters of the companions are also derived.
• The most significant result is related HD120235, which have a highly eccentricity.
• The eccentricity value is the largest one known for a SB1.

We present three low-mass and one solar mass companions found around four intermediate-mass giants HD1695, HD120235, HD145316 and HD200004 from precise radial velocity measurements using the 1.51.5 m Russian-Turkish Telescope (RTT150) at the TÜBİTAK National Observatory of Turkey (TUG). The stellar parameters, which are effective temperature (TeffTeff), surface gravity (logg  ) and metallicity ([Fe/H][Fe/H]), as well as rotational velocity (vsini) are obtained from spectral analysis. From the estimated stellar masses, the orbital parameters of the companions are also derived. We find two types of Keplerian solutions for the companion of HD120235: (1) periods 5522 days and eccentricity of e∼0.93e∼0.93, and (2) periods 1566 days and eccentricity of e∼0.83e∼0.83. From the abundances analysis HD1695 is found to be a metal-rich star with [Fe/H]>0.1[Fe/H]>0.1, while HD200004 is a metal poor star with [Fe/H]<-0.2[Fe/H]<-0.2. The other two stars, HD120235 and HD145316, have solar-like abundances with [Fe/H]∼0.0[Fe/H]∼0.0. Our stellar parameters and orbital solutions show that all of these stars are evolved intermediate-mass giants.