Dynamical Evidence for a Black Hole in the Microquasar Xte J1550-564

@inproceedings{Zhao2008DynamicalEF,
  title={Dynamical Evidence for a Black Hole in the Microquasar Xte J1550-564},
  author={Ping Zhao and Charles D. Bailyn and Ronald A. Remillard},
  year={2008}
}
Optical spectroscopic observations of the companion star ( type G8IV to K4III) in the microquasar system XTE J1550-564 reveal a radial velocity curve with a best fitting s pectroscopic period of Psp = 1.552±0.010 days and a semiamplitude of K2 = 349±12 km s−1. The optical mass function is f (M) = 6.86±0.71M⊙ (1σ). We tentatively measure the rotational velocity of the companion star to be Vrot sini = 90±10 km s−1, which when taken at face value implies a mass ratio of Q ≡ M1/M2 = 6.6+2.5 −1.6 (1… CONTINUE READING