1307.3244 (M. Teodoro et al.)

Detection of the compressed primary stellar wind in eta Carinae    [PDF]

M. Teodoro, T. I. Madura, T. R. Gull, M. F. Corcoran, K. Hamaguchi

A series of three HST/STIS spectroscopic mappings, spaced approximately one year apart, reveal three partial arcs in [Fe II] and [Ni II] emissions moving outward from eta Carinae. We identify these arcs with the shell-like structures, seen in the 3D hydrodynamical simulations, formed by compression of the primary wind by the secondary wind during periastron passages.

View original: http://arxiv.org/abs/1307.3244