Low-mass companions to nine stars

Abstract

We present an independent spectroscopic and radial velocity analysis for nine stars from the Pennsylvania-Toruń Planet Search. For BD+24 4697, we present an updated true companion's mass (0.16$\pm$0.02 \, M${}_{\odot }$), as well as evidence of stellar activity. For BD+54 1640 and BD+65 1241 we present true masses of companions, $m=0.15\pm 0.04M_{\odot }$ and $m=0.091\pm 0.005M_{\odot }$, respectively. For BD+63 974 and BD+69 935 we find low mass companions with $m\sin i=0.046\pm 0.001M_{\odot }$ and $m\sin i=0.090\pm 0.005M_{\odot }$. For BD+52 1281, BD+54 1382, TYC 2704-2680-1, and TYC 3525-02043-1 we present evidence of low-mass companions with $m\sin i$ of 0.115 $\pm 0.006M_{\odot }$, 0.083 $\pm 0.007M_{\odot }$, 0.279 $\pm 0.009M_{\odot }$, and $0.064\pm 0.006M_{\odot }$, respectively. Consequently, BD+54 1382, BD+63 974, BD+65 1241, BD+69 935 and TYC 3525-02043-1 appear to be Brown Dwarf host candidates.