A Study of the young quadrupole system AO Vel with a ZAMS eclipsing BpSi primary and PMS companions

GONZALEZ, J. F.; HUBRIG, S.; NESVACIL, N.; NORTH, P.

Garching, Alemania

Workshop; Multiple Stars across the H-R Diagram; 2005

European Southern Observatory

Using recent spectroscopic observations we discovered that the triple system AO Vel with an eclipsing BpSi primary is in fact a remarkable quadruple system formed by two double-lined spectroscopic binaries with ZAMS and PMS companions. For the first time, direct determination of the radius and the mass have been obtained for a BpSi star.