Physical Sciences and Mathematics Commons^™

The Nature Of The Light Variability Of The Silicon Star Hr 7224, Jiří Krtička, Zdeněk Mikulášek, Gregory W. Henry, Juraj Zverko, Jozef Žižňovský, Jan Skalický, Pavel Zvěřina

Information Systems and Engineering Management Research Publications

Context. Although photometric variations of chemically peculiar (CP) stars are frequently used to determine their rotational periods, the detailed mechanism of their light variability remains poorly understood.
Aims. We simulate the light variability of the star HR 7224 using the observed surface distribution of silicon and iron.
Methods. We used the TLUSTY model atmospheres calculated for the appropriate silicon and iron abundances to obtain the emergent flux and to predict the rotationally modulated light curve of the star. We also obtained additional photometric measurements and employed our own regression procedure to derive a more precise estimate of the light elements. …