The irregular variable KU Her: The light and period variations

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Sipahi E.

NEW ASTRONOMY, vol.17, no.3, pp.377-381, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1016/j.newast.2011.09.003
  • Title of Journal : NEW ASTRONOMY
  • Page Numbers: pp.377-381


We present CCD photometric observations of the slow irregular type variable KU Her. We have also used observations from the ASAS Database and the AAVSO International Database. The V-band observations span eight years from August of 2002 to September of 2010. The length and density of the data enable us to look for variations on time scales ranging from days to years. The V-band observations of KU Her are analysed to derive periodicity. This analysis was an approach to find the fundamental periods of the variability of KU Her. Analysis of the KU Her light variation indicates a complex combination of different periods. Five main and three harmonic periods are identified. In addition to the period analysis, we present the colour variations of the star. (C) 2011 Elsevier Ltd. All rights reserved.