Informace o publikaci

Photometric study of the star with changing Blazhko effect: TV Bootis

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SKARKA Marek ZEJDA Miloslav

Rok publikování 2013
Druh Článek v odborném periodiku
Časopis / Zdroj Monthly Notices of the Royal Astronomical Society
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://adsabs.harvard.edu/abs/2013MNRAS.428.1442S
Doi http://dx.doi.org/10.1093/mnras/sts135
Obor Astronomie a nebeská mechanika, astrofyzika
Klíčová slova variable star; RR Lyr; Blazhko effect; TV Boo
Popis This study investigates periodic modulation of the light curve of the RRc star TV Boo and its physical parameters based on photometric data. This phenomenon, known as the Blazhko effect, is quite rare among RRc stars. The frequency analysis based on the data gathered at the Masaryk University Observatory (MUO) and also using SuperWASP data revealed symmetrically structured peaks around the main pulsation frequency and its harmonics, which indicate two modulation components of the Blazhko period. The main modulation periodicity was found to be 9.7374 +- 0.0054 d. This is one of the shortest known Blazhko periods among RRc stars. The second modulation period (21.5 +- 0.2 d) causes changes of the Blazhko effect itself. Some indices show that TV Boo could be affected by long-term changes of the order of years. Basic physical parameters were estimated via an MUO V light-curve solution using Fourier parameters. TV Boo seems to be a low-metallicity star with [Fe/H] = -1.89.
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