No evidence for a low-mass black hole in Swift J1753.5-0127
Abstract
We present high-resolution, time-resolved optical spectroscopy of the black hole X-ray transient Swift J1753.5-0127. 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 object is likely >7.41.2M, much higher than previous suggestions of a low-mass (<5M) black hole.
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