Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.317..333m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 317, Issue 2, pp. 333-342.
Astronomy and Astrophysics
Astronomy
9
Binaries: General, Stars: Early-Type, Stars: General, Stars: Individual: Iota Orionis
Scientific paper
With the objective of investigating the wind-wind collision phenomenon and supporting contemporaneous X-ray observations, we have organized a large-scale, coordinated optical monitoring campaign of the massive, highly eccentric O9III+B1III binary Iota Orionis. Successfully separating the spectra of the components, we refine the orbital elements and confirm the rapid apsidal motion in the system. We also see strong interaction between the components during periastron passage and detect phase-locked variability in the spectrum of the secondary star. However, we find no unambiguous signs of the bow shock crashing on the surface of the secondary, despite the predictions of hydrodynamic simulations. Combining all available photometric data, we find rapid, phase-locked variations and model them numerically, thus restricting the orbital inclination to 50°<~i<~70°.
Antokhin Igor I.
Antokhina Eleonora A.
Ballereau Dominique
Chauville Jacques
Corcoran Michael F.
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