Dark spot, spiral waves and the SW Sextantis behaviour: it is all about UX Ursae Majoris

  title={Dark spot, spiral waves and the SW Sextantis behaviour: it is all about UX Ursae Majoris},
  author={V. Neustroev and V. Suleimanov and N. Borisov and K. Belyakov and A. Shearer},
  journal={Monthly Notices of the Royal Astronomical Society},
  • V. Neustroev, V. Suleimanov, +2 authors A. Shearer
  • Published 2010
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • We present an analysis of time-resolved, medium resolution optical spectroscopic observations of UX UMa in the blue (3920‐5250 ˚ A) and red (6100‐7200 ˚ A) wavelength ranges, that were obtained in April 1999 and March 2008 respectively. The observed characteristics of our spectra indicate that UX UMa has been in different states during those observations. The blue spectra are very complex. They are dominated by strong and broad single-peaked emission lines of hydrogen. The high-excitation lines… CONTINUE READING
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