B and R Photometry of AM HER during 1993

Details B and R Photometry of AM HER during 1993 B and R Photometry of AM HER during 1993

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ap%26ss.234..207k&link_type=abstract

Astrophysics and Space Science, Volume 234, Issue 2, pp.207-215

Astronomy and Astrophysics

Astrophysics

Scientific paper

The results from the simultaneous observations in B and R colours of AM Her are presented. Analysis of these data shows the following: (a) There are always two clear minima in the R light curves, while the secondary minimum in B light curves sometimes is not well defined; (b) The times of the minima in R and B colour nearly coincide; (c) The photometric period changes remarkably from cycle to cycle but its mean value remains constant; (d) Short stillstands on the increasing branches of the two minima are seen similar to those visible in UX UMa-type cataclysmic stars; (e) Besides the irregular flickering with time scale of a few minutes, a variability with a period 20.28 min in the two colours is established.

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