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Centro de Astrofísica da Universidade do Porto

Improvements on analytic modelling of stellar spots

M. Montalto, G. Boué, M. Oshagh, I. Boisse, G. Bruno, N. C. Santos

In this work, we present the solution of the stellar spot problem using the Kelvin–Stokes theorem. Our result is applicable for any given location and dimension of the spots on the stellar surface. We present explicitly the result up to the second degree in the limb-darkening law. This technique can be used to calculate very efficiently mutual photometric effects produced by eclipsing bodies occulting stellar spots and to construct complex spot shapes.

methods: analytical, stars: activity

Monthly Notices of the Royal Astronomical Society
Volume 444, Page 1721
October 2014

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Institute of Astrophysics and Space Sciences

Institute of Astrophysics and Space Sciences (IA) is a new but long anticipated research infrastructure with a national dimension. It embodies a bold but feasible vision for the development of Astronomy, Astrophysics and Space Sciences in Portugal, taking full advantage and fully realizing the potential created by the national membership of the European Space Agency (ESA) and the European Southern Observatory (ESO). IA resulted from the merging the two most prominent research units in the field in Portugal: the Centre for Astrophysics of the University of Porto (CAUP) and the Center for Astronomy and Astrophysics of the University of Lisbon (CAAUL). It currently hosts more than two-thirds of all active researchers working in Space Sciences in Portugal, and is responsible for an even greater fraction of the national productivity in international ISI journals in the area of Space Sciences. This is the scientific area with the highest relative impact factor (1.65 times above the international average) and the field with the highest average number of citations per article for Portugal.

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