The Rapidly-Evolving Hypergiant IRC +10420

Details The Rapidly-Evolving Hypergiant IRC +10420 The Rapidly-Evolving Hypergiant IRC +10420

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5838s&link_type=abstract

HST Proposal ID #5838

Physics

Hst Proposal Id #5838 Cool Stars

Scientific paper

We propose to undertake a detailed study of the circumstellar envelope of the peculiar F hypergiant IRC +10420, which is a unique object, caught in the short transition phase between the red supergiant and the Wolf-Rayet stage. By performing high spatial resolution imaging in a number of emission lines that probe several parts of the wind we aim to determine the shape and the kinematic structure of the circumstellar envelope. In particular we wish to to investigate whether the geometry of the wind is disc-like or bipolar. The observations will help understanding the change in geometry of the circumstellar envelope as stars evolve from the Red Supergiant Stage to the Wolf-Rayet phase.

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