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Substantial Disc Loss in the Be/X-ray Binary System A0535+26
N.J. Haigh, M.J. Coe, I.A. Steele, J. Fabregat
Journal:

International Astronomical Union Colloquium / Volume 175 / 2000

Published online by Cambridge University Press:

12 April 2016, pp. 735-738

Print publication:

2000
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Infrared JHK photometry from October 1998 revealed a remarkable change in the Be/X-ray binary system A0535+26, manifesting itself as a dramatic reduction in emission from the circumstellar disc. Optical and IR spectra presented here have confirmed this disc-loss in greater detail showing radically reduced Hydrogen and Helium line emission, to a degree never before seen in this system, and only rarely in a handful of Be/X-ray binaries. Optical spectroscopy has revealed the re-appearance of a small, stable inner disc, and IR spectra/photometry show the eventual regrowth of a robust circumstellar disc resembling the pre-disc-loss state.