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Low-Mass Companions to Nine Stars

Niedzielski A., Jaros R., Srivastava D., Adamów M., Wolszczan A., Villaver E., Maciejewski G., Deka-Szymankiewicz B.

Acta Astronomica

2025

Vol. 75, No. 2

63--95

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±0.02 M⊙) as well as evidence of stellar activity. For BD+54 1640 and BD+65 1241 we present true masses of companions, m=0.15±0.04 M⊙) and m=0.091± 0.005 M⊙), respectively. For BD+63 974 and BD+69 935 we find low mass companions with m sin i=0.046±0.001 M⊙) and m sin i=0.090±0.005 M⊙). 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±0.006 M⊙), 0.083±0.007 M⊙), 0.279±0.009 M⊙), and 0.064±0.006 M⊙), 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.