Article (Scientific journals)
Coordinated monitoring of the eccentric O-star binary Iota Orionis: optical spectroscopy and photometry
Marchenko, Sergey V; Rauw, Grégor; Antokhina, Eleonora A et al.
2000In Monthly Notices of the Royal Astronomical Society, 317, p. 333-342
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Keywords :
BINARIES: GENERAL; STARS: EARLY-TYPE; STARS: GENERAL; STARS: INDIVIDUAL: IOTA ORIONIS
Abstract :
[en] 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°.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Marchenko, Sergey V;  Département de Physique and Observatoire du Mont Mégantic, Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
Rauw, Grégor  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) - Sciences spatiales
Antokhina, Eleonora A;  Moscow State University, Sternberg State Astronomical Institute, Universitetskij Prospect 13, 119899, Moscow, Russia
Antokhin, Igor I;  Moscow State University, Sternberg State Astronomical Institute, Universitetskij Prospect 13, 119899, Moscow, Russia
Ballereau, Dominique;  Observatoire de Paris-Meudon, DASGAL/UMR 8633, F-92125 Meudon Principal Cedex, France
Chauville, Jacques;  Observatoire de Paris-Meudon, DASGAL/UMR 8633, F-92125 Meudon Principal Cedex, France
Corcoran, Michael F;  Universities Space Research Association/Laboratory for High Energy Astrophysics, GSFC, Greenbelt, MD 20771, USA
Costero, Rafael;  Instituto de Astronomía, Universidad Nacional Autónoma de México, J. J. Tablada 1006, Colonia Lomas de Santa Maria, 58090 Morelia, Michoacán, Mexico
Echevarria, Juan;  Instituto de Astronomía, Universidad Nacional Autónoma de México, J. J. Tablada 1006, Colonia Lomas de Santa Maria, 58090 Morelia, Michoacán, Mexico
Eversberg, Thomas;  Département de Physique and Observatoire du Mont Mégantic, Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
Gayley, Ken G;  University of Iowa, 203 van Allen Hall, Iowa City, IA 52245, USA
Koenigsberger, Gloria;  Instituto de Astronomía, Universidad Nacional Autónoma de México, J. J. Tablada 1006, Colonia Lomas de Santa Maria, 58090 Morelia, Michoacán, Mexico
Miroshnichenko, Anatoly S;  Ritter Observatory, The University of Toledo, Toledo, OH 43606, USA
Moffat, Anthony F J;  Département de Physique and Observatoire du Mont Mégantic, Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, QC H3C 3J7, Canada
Morrell, Nidia I;  Observatorio de La Plata, 1900 La Plata, Argentina
Morrison, Nancy D;  Ritter Observatory, The University of Toledo, Toledo, OH 43606
Mulliss, Christopher L;  Ritter Observatory, The University of Toledo, Toledo, OH 43606
Pittard, Julian M;  School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT
Stevens, Ian R;  School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT
Vreux, Jean-Marie ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO)
Zorec, Jean;  Institut d'Astrophysique, 98bis boulevard Arago, 75014 Paris, France
More authors (11 more) Less
Language :
English
Title :
Coordinated monitoring of the eccentric O-star binary Iota Orionis: optical spectroscopy and photometry
Publication date :
01 September 2000
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
317
Pages :
333-342
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 July 2009

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