Photometric Period of the Star PZ Mon
- 22 Downloads
Results are presented from a search for periodic variations in the brightness and color indices of the active star PZ Mon based on many years of photometric data from 1992 to 2015. The photometric period derived from the entire set of observations is 34.16 days, but the period may vary by 1.5% within individual intervals. The color index V-R varies with the same period. These variations are indicative of reddening of the star with decreasing brightness. A correlation between the values exists over the entire observation interval. The variations in B-V occur over an interval of 26-28 days. A nonuniqueness in these variations shows up in a brightness-color index diagram: a reduction in the color index with decreasing brightness is observed in some epochs, which can be explained in terms of a spottedness model by the presence of cold, as well as hot, formations on the star’s surface.
Keywordsstars: variable stars: RS CVn-type activity: photometry: PZ Mon
Unable to display preview. Download preview PDF.
- 1.L. Munch and G. Munch, Tonantz. Tac. Bol. 2, 36 (1955).Google Scholar
- 2.S. Gaposchkin, Tonantz. Tac. Bol. 2, 42 (1955).Google Scholar
- 6.N. N. Samus, O. V. Durlevich, et al., General Catalogue Variable Stars (2009).Google Scholar
- 7.A. A. Wachmann, Astron. Abhand. Hamburg. Sternw. 7 (8), 397 (1968).Google Scholar
- 9.N. I. Bondar’, Izv. Krymskoi Astrofiz Obs. 93, 111 (1996), [Bull. Crimean Astrophys. Obs. 93, 95 (1996)].Google Scholar
- 13.Yu. V. Pakhomov and N. A. Gorynya, Pis’ma v Astron. zh. 41, 1 (2015), [Astron. Lett. 41, 677 (2015)].Google Scholar
- 14.V. Piirola, Helsinki Univ. Obs. Astrophys. Lab. Report. 6, 151 (1984).Google Scholar
- 17.ASAS [http://www.astrouw.edu.pl/asas/]).
- 18.AVE [http://www.gea.cesca.es]).