First Results with the IOTA3 Imaging Interferometer: The Spectroscopic Binaries Virginis and WR 140 | Zendy

John D. Monnier | Zendy; W. A. Traub | Zendy; F. Peter Schloerb | Zendy; R. MillanGabet | Zendy; Jean-Philippe Berger | Zendy; E. Pedretti | Zendy; N. P. Carleton | Zendy; Stefan Kraus | Zendy; M. G. Lacasse | Zendy; Michael Brewer | Zendy; Sam Ragland | Zendy; A. Ahearn | Zendy; Charles M. Coldwell | Zendy; Pierre Haguenauer | Zendy; P. Kern | Zendy; P. Labeye | Zendy; Laure Lagny | Zendy; F. Malbet | Zendy; Daniella Malin | Zendy; P. Maymounkov | Zendy; S. Morel | Zendy; C. Papaliolios | Zendy; K. Perraut | Zendy; M. R. Pearlman | Zendy; I. Porro | Zendy; Isabelle Schanen | Zendy; Kamal Souccar | Zendy; Guillermo Torres | Zendy; Gary Wallace | Zendy

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First Results with the IOTA3 Imaging Interferometer: The Spectroscopic Binaries Virginis and WR 140

Author(s) -

John D. Monnier,

W. A. Traub,

F. Peter Schloerb,

R. MillanGabet,

Jean-Philippe Berger,

E. Pedretti,

N. P. Carleton,

Stefan Kraus,

M. G. Lacasse,

Michael Brewer,

Sam Ragland,

A. Ahearn,

Charles M. Coldwell,

Pierre Haguenauer,

P. Kern,

P. Labeye,

Laure Lagny,

F. Malbet,

Daniella Malin,

P. Maymounkov,

S. Morel,

C. Papaliolios,

K. Perraut,

M. R. Pearlman,

I. Porro,

Isabelle Schanen,

Kamal Souccar,

Guillermo Torres,

Gary Wallace

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/382213

Subject(s) - physics , interferometry , astrophysics , brightness , telescope , binary star , binary number , star (game theory) , orbit (dynamics) , position angle , aperture (computer memory) , astronomy , optics , stars , galaxy , arithmetic , mathematics , acoustics , engineering , aerospace engineering

We report the first spatially-resolved observations of the spectroscopicbinaries lambda Vir and WR 140, which includes the debut of aperture-synthesisimaging with the upgraded three-telescope IOTA interferometer. Using IONIC-3, anew integrated optics beam combiner capable of precise closure phasemeasurement, short observations were sufficient to extract the angularseparation and orientation of each binary system and the component brightnessratio. Most notably, the underlying binary in the prototypical colliding-windsource WR 140 (WC7 + O4/5) was found to have a separation of ~13milli-arcseconds with a position angle consistent with the images of the 2001dust shell ejection only if the Wolf-Rayet star is fainter than the O star at1.65 microns. We also highlight lambda Vir whose peculiar stellar properties ofthe Am star components will permit direct testing of current theories of tidalevolution when the full orbit is determined.Comment: To appear in ApJ Letters (13 pages, 2 tables, 3 figures

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