Affiliation: | (1) Institute of Theoretical Physics & Astrophysics, Faculty of Science, Masaryk University, Brno, Czech Republic;(2) Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic;(3) C.N.R. Instituto di Astrofisica Spaziale e Fisica Cosmica – I.A.S.F./CNR, Bologna, Italy;(4) Astronomical Institute of the Academy of Sciences of Czech Republic, Ondřejov, Czech Republic |