A signature of the donor star in the extra-galactic X-ray binary LMCX-2
Two nights of phase-resolved medium-resolution Very Large Telescope spectroscopy of the extra-galactic low-mass X-ray binary LMCX-2 have revealed a 0.32 +/- 0.02 d spectroscopic period in the radial velocity curve of the HeII λ4686 emission line that we interpret as the orbital period. However, similar to previous findings, this radial velocity
Cornelisse, R. et al.
Fecha de publicación:
10
2007