The top-ranked international journal Astronomy and Astrophysics has published a scientific paper by Ilia State University (ISU) PhD student Mariam Albekioni, the lead author. The paper was written as part of the joint “Carl Friedrich Lehmann-Haupt International Doctoral School” between ISU and the University of Göttingen (Germany).
Mariam Albekioni is a PhD student at both Ilia State University and the University of Göttingen as well as a researcher at the Space Research Center, the Department of Astronomy and Astrophysics.
The paper covers the theoretical study of Rossby (planetary) wave dynamics in the early-type stellar interiors.
Rossby waves associated with rotation provide the large-scale-process dynamics of the Earth’s atmosphere and oceans, planetary atmospheres, and the core of the sun. Modern observations made by modern space missions indicate the existence of these waves in different types of stars. It allows the combined study of stellar interiors and theoretical modeling.
This paper studies the latitudinal and radial spread of Rossby waves in the early-type stellar interiors for different vertical temperature profiles. It shows that the waves mainly arise near the stellar surface and are concentrated at the latitudes near the equator. The properties of Rossby waves depend significantly on both the temperature and rotation of the innermost layers of the stars. Therefore, studying stellar interiors is possible by comparing the theoretical results with observations. The research of Rossby waves continues for late-type stars as well.
Current studies are important to research stellar interiors at different stages of their evolution observed by various space missions (Kepler, CoRoT, TESS, Gaia).
For details and further information please see the scientific paper: “Rossby waves on stellar equatorial β planes: Uniformly rotating radiative stars”, M. Albekioni, T.V. Zaqarashvili, V. Kukhianidze, A&A, Vol. 671, A91.