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@inproceedings{1298622, author = {Mikulášek, Zdeněk and Janík, Jan and Krtička, Jiří and Zejda, Miloslav and Jagelka, Miroslav}, address = {San Francisco}, booktitle = {Physics and Evolution of Magnetic and Related Stars}, edition = {494}, editor = {Kudryavtsev, D. O.; Balega, Yu. Yu.; Romanyuk, I. I.}, keywords = {BS Cir; photometry; CP stars}, howpublished = {tištěná verze "print"}, language = {eng}, location = {San Francisco}, isbn = {978-1-58381-873-2}, pages = {189-196}, publisher = {Astronomical Society of the Pacific}, title = {Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini}, year = {2015} }
TY - JOUR ID - 1298622 AU - Mikulášek, Zdeněk - Janík, Jan - Krtička, Jiří - Zejda, Miloslav - Jagelka, Miroslav PY - 2015 TI - Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini PB - Astronomical Society of the Pacific CY - San Francisco SN - 9781583818732 KW - BS Cir KW - photometry KW - CP stars N2 - BS Cir is a representative of moderately cool magnetic chemically peculiar stars, which shows very strong light variations in the Strömgren index c1, indicating large changes in the height of the Balmer jump. We present a two-spot model of the light variations, fitting successfully all the nine light curves obtained in the spectral region 335-750 nm. We also discuss the nature of the observed variations of the intensities of Fe, Cr, Ti, Si, Mg, and RE spectral lines and possible mechanisms matching the observed light variations. It was confirmed that the observed period of BS Cir 2.204d is rising with a rate of dP/dt = 5.4(4)×10-9. The found minor secular changes in the shape of the light curve should be compatible with the period changes caused by precessional motion due to magnetic distortion of the star. ER -
MIKULÁŠEK, Zdeněk, Jan JANÍK, Jiří KRTIČKA, Miloslav ZEJDA and Miroslav JAGELKA. Preliminary Study of the Moderately Cool Chemically Peculiar Star BS Circini. In Kudryavtsev, D. O.; Balega, Yu. Yu.; Romanyuk, I. I. \textit{Physics and Evolution of Magnetic and Related Stars}. 494th ed. San Francisco: Astronomical Society of the Pacific, 2015, p.~189-196. ISBN~978-1-58381-873-2.
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