Hydrogen deficient donors in low-mass X-ray binaries
Gijs Nelemans
TL;DR
This paper reviews hydrogen-deficient donor stars in low-mass X-ray binaries, emphasizing optical spectroscopy insights into systems with evolved, hydrogen-poor companions transferring material to neutron stars or black holes.
Contribution
It provides a comprehensive overview of the current understanding of hydrogen-deficient donors in low-mass X-ray binaries, highlighting recent spectroscopic findings.
Findings
Identification of hydrogen-deficient donor stars in X-ray binaries
Spectroscopic evidence of evolved, compact donor stars
Insights into mass transfer processes in these systems
Abstract
A number of X-ray binaries (neutron stars or black holes accreting from a companion star) have such short orbital periods that ordinary, hydrogen rich, stars do not fit in. Instead the mass-losing star must be a compact, evolved star, leading to the transfer of hydrogen deficient material to the neutron star. I discuss the current knowledge of these objects, with focus on optical spectroscopy.
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Taxonomy
TopicsHigh-pressure geophysics and materials · Astrophysical Phenomena and Observations · Mechanics and Biomechanics Studies