No evidence for a low-mass black hole in Swift J1753.5โ0127
No evidence for a low-mass black hole in Swift J1753.5โ0127
We present high-resolution, time-resolved optical spectroscopy of the black hole X-ray transient Swift J1753.5โ0127. Our optical spectra do not show features that we can associate with the companion star. However we do observe broad, double-peaked emission lines, typical of an accretion disc. We show that the mass of the compact โฆ