Coronae of A-type Stars\: Does Dust Play a RolequestionMark

Atype stars are not expected to be sites of vigorous stellar magnetic activityphenomena like chromospheric or coronal emissions and hence should be Xraydark. With a few exceptions, this expectation is borne out in observations.However, in investigating those Atype stars with Xray emission where alowermass companion is not to blame, we have discovered a tentative connectionbetween the presence of nearinfrared excess emission (indicating very closeinorbiting dust) and detected Xray emission. In this proposal we seek to furthervet this with XMMNewton observations that will yield a statistical sample ofXray characterized Atype stars with and without nearinfrared excess emission. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]