Affiliation: | Dipartimento di Astronomia, Universitàdi Trieste, via Tiepolo 11, 34131 Trieste, Italy;INAF –Osservatorio Astronomico di Trieste, via Tiepolo 11, 34131 Trieste, Italy;Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany |