Permission to reprint

Requests for permission to reprint figures or tables which have already been published in Astronomy & Astrophysics and Astronomy & Astrophysics Supplement Series should be addressed to the copyright holders, not to the publishers. The address is:

Professor C. Bertout
Astronomy and Astrophysics
Editorial Office
Observatoire de Paris
61 avenue de l'Observatoire
75014 Paris, France
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