A follow-up study of the colliding wind binary Cyg OB2 #8a

Details A follow-up study of the colliding wind binary Cyg OB2 #8a A follow-up study of the colliding wind binary Cyg OB2 #8a

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop..183r&link_type=abstract

XMM-Newton Proposal ID #05051102

Physics

Stars, White Dwarfs, Solar System, Cyg Ob2 #8A, Cyg Ob2 #8A, Xmm-Newton Proposal 05051102

Scientific paper

We propose to observe the colliding wind binary Cyg OB2 #8a (O6If + O5.5III(f)) for 3 x 20 ksec near specific orbital phases. Previous XMM-Newton observations revealed a modulation of the X-ray flux of this system. At the same time, the radio emission of Cyg OB2 #8a also undergoes a phase-locked variation. The joint analysis of the variations in the X-ray and radio domains will provide unprecedented information on the interplay between colliding wind interactions and the acceleration of relativistic particles that produce the non-thermal radio emission. The Cyg OB2 cluster further harbours a number of early-type stars (two of them are non-thermal radio emitters) that are bright X-ray sources, as well as a wealth of secondary sources (most of them being low-mass PMS stars).

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