The Nature of the Companion Star and Mass Outflow in the Massive Binary RY Scuti

Details The Nature of the Companion Star and Mass Outflow in the Massive Binary RY Scuti The Nature of the Companion Star and Mass Outflow in the Massive Binary RY Scuti

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop..228g&link_type=abstract

NOAO Proposal ID #1999A-0228

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Scientific paper

RY Sct is a massive interacting binary consisting of two hot supergiants in near contact. The mass outflow from this system extends some 2000 AU outwards into a flattened disk or torus resolved in both radio and IR. We propose here to make high S/N and high resolution optical spectra of the central binary over one orbital period in order to (1) determine the orbit and nature of the faint companion star (using Doppler tomography to separate the component spectra), and (2) search for evidence of colliding winds and other manifestations of outflow through a study of the orbital variations of the emission lines. Our goals are to understand how mass loss processes lead to the formation of a huge circumbinary disk and how they effect the evolution of massive binaries at the critical contact stage.

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