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Paper: Ultra-high resolution spectroscopy of P Cygni and similar stars in the optical wavelength region
Volume: 233, P Cygni 2000: 400 Years of Progress
Page: 129
Authors: Gaeng, T.
Abstract: We present and discuss optical spectra of Luminous Blue Variables (LBVs) with resolutions of R 50000-100000 and high signal-to-noise ratios (S/N ~100-1000, depending on wavelength region and object). None of the stars show significant variations in their spectra during our snap-shot observations (time-scale of a few hours). All objects exhibit inhomogeneities in their line profiles that get more pronounced and more frequent in spectral lines that are formed further out in the atmosphere. These findings indicate that LBVs might have non-uniform wind structures where clumps and/or shells could be common features. All spectra and their detailed descriptions can be found in chapter 4 and the appendix of the Ph.D. thesis at:
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