HET observations of the outburst of XTE J1859+226

Details HET observations of the outburst of XTE J1859+226 HET observations of the outburst of XTE J1859+226

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aspc..261..571w&link_type=abstract

The Physics of Cataclysmic Variables and Related Objects, ASP Conference Proceedings, Vol. 261. Edited by B. T. Gänsicke, K. Beu

Physics

Scientific paper

Spectroscopy of the soft X-ray transient XTE J1859+226 were obtained with the Low Resolution Spectrograph on the Hobby-Eberly Telescope (HET) beginning six days after the onset of the outburst and continuing for 4 weeks. The spectra show a strong evolution of the line profiles and strengths during the outburst: emission lines and broad absorption lines decrease in strength as the outburst declines. This suggests that strong X-ray irradiation is driving line formation in the outburst. However, the emission--line radial velocities and equivalent widths indicate that simple reprocessing off the secondary star or outer disk is unlikely and that a more complex mechanism must be present.

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