Nova Cygni 1975 (V1500 Cyg) in 2000-2009 and the nature of its synodic period

Details Nova Cygni 1975 (V1500 Cyg) in 2000-2009 and the nature of its synodic period Nova Cygni 1975 (V1500 Cyg) in 2000-2009 and the nature of its synodic period

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap.....54...36l&link_type=abstract

Astrophysics, Volume 54, Issue 1, pp.36-51

Astronomy and Astrophysics

Astrophysics

Stars, Nova— Individual, V1500 Cyg

Scientific paper

Multicolor photometric data are presented for the asynchronous polar V1500 Cyg during 2000-2009, i.e., 23-35 years after its outburst. Some examples of individual light curves of the system are shown. An analysis of these reveals large variations in its brightness and color with the phase of the orbital period owing to a "reflection effect" caused by reradiation from the side of the red dwarf facing the hot white dwarf and heated by its hard ultraviolet radiation. The variations in the O-C residuals and in the maximum intensity with the phase of the synodic period are illustrated. It is found that the amplitude A of the orbital fluctuations increases in proportion to the intensity I at a rate dA/dI=0.64. This behavior of V1500 Cyg is most likely caused by periodic shading of the illuminated part of the red dwarf, where the degree of shading depends on the phase of the synodic cycle.

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