No evidence for a low-mass black hole in Swift J1753.5-0127
A. W. Shaw, P. A. Charles, J. Casares, J. V. Hern\'andez Santisteban
TL;DR
High-resolution optical spectroscopy of Swift J1753.5-0127 reveals no evidence of a low-mass black hole, instead indicating a likely high-mass black hole exceeding 7.4 solar masses, challenging previous low-mass estimates.
Contribution
This study provides the first high-resolution spectroscopic evidence suggesting a high-mass black hole in Swift J1753.5-0127, contradicting earlier low-mass claims.
Findings
No companion star features detected
Presence of broad, double-peaked emission lines
Black hole mass likely >7.4 solar masses
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 , much higher than previous suggestions of a low-mass () black hole.
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