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Nonlinear asteroseismology of RR Lyrae
L. Molnár, Z. Kolláth, R. Szabó +4
The observations of the Kepler space telescope revealed that fundamental-mode RR Lyrae stars may show various radial overtones. The presence of multiple radial modes may allow us t…
Discovery of a magnetic field in the early B-type star sigma Lupi
H. F. Henrichs, K. Kolenberg, B. Plaggenborg +7
Magnetic early B-type stars are rare. To identify them, we use the strongest indirect indicator of a magnetic field in B stars, which is periodic variability of UV stellar wind lin…
Discovery of Peculiar Double-Mode Pulsations and Period Doubling in KEPLER RRc Variables
P. Moskalik, R. Smolec, K. Kolenberg +6
We analyzed the Long Cadence photometry of 4 first overtone RR Lyr-type stars (RRc stars) observed by the KEPLER telescope. All studied variables are multiperiodic. The strongest s…
The complex case of V445 Lyr observed with Kepler: Two Blazhko modulations, a non-radial mode, possible triple mode RR Lyrae pulsation, and more
E. Guggenberger, K. Kolenberg, J. M. Nemec +13
Rapid and strong changes in the Blazhko modulation of RR Lyrae stars, as they have recently been detected in high precision satellite data, have become a crucial topic in finding a…