Astronomický seminář: Martin Vaňko

Zveme Vás na přednášku astonomického semináře Ústavu teoretické fyziky a astrofyziky

Martin Vaňko: The fine effects in the TESS light curves of selected CP stars (and other projects)

The light curves of magnetic, chemically peculiar stars typically show periodic variability due to surface spots that in most cases can be modelled by low-order harmonic expansion. However, high-precision satellite photometry reveals tiny complex features in the light curves of some of these stars that are difficult to explain as caused by a surface phenomenon under reasonable assumptions. These features might originate from light extinction in co-rotating magnetospheric clouds supported by a complex magnetic field dominated by higher-order multipoles. An analysis of several CP stars' dips and spectroscopic observations will be presented. In the second part of the presentation, I will show other ongoing projects in the Stellar department at the Astronomical Institute in the High Tatras.