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

J. D. Monnier; W. A. Traub; F. P. Schloerb; R. Millan-Gabet; J.-P. Berger; E. Pedretti; N. P. Carleton; S. Kraus; M. G. Lacasse; M. Brewer; S. Ragland; A. Ahearn; C. Coldwell; P. Haguenauer; P. Kern; P. Labeye; L. Lagny; F. Malbet; D. Malin; P. Maymounkov; S. Morel; C. Papaliolios; K. Perraut; M. Pearlman; I. L. Porro; I. Schanen; K. Souccar; G. Torres; G. Wallace

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

J. D. Monnier, W. A. Traub, F. P. Schloerb, R. Millan-Gabet, J.-P. Berger, E. Pedretti, N. P. Carleton, S. Kraus, M. G. Lacasse, M. Brewer, S. Ragland, A. Ahearn, C. Coldwell, P. Haguenauer, P. Kern, P. Labeye, L. Lagny, F. Malbet, D. Malin, P. MaymounkovS. Morel, C. Papaliolios, K. Perraut, M. Pearlman, I. L. Porro, I. Schanen, K. Souccar, G. Torres, G. Wallace

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Abstract

We report the first spatially resolved observations of the spectroscopic binaries ¿ Vir and WR 140, including the debut of aperture-synthesis imaging with the upgraded three-telescope IOTA interferometer. Using IONIC-3, a new integrated optics beam combiner capable of a precise closure phase measurement, short observations were sufficient to extract the angular separation and orientation of each binary system and the component brightness ratio. Most notably, the underlying binary in the prototypical colliding-wind source WR 140 (WC7+O4/O5) was found to have a separation of ~13 mas with a position angle of 152°, consistent with previous interpretations of the 2001 dust shell ejection only if the Wolf-Rayet star is fainter than the O star at 1.65 ¿m. We also highlight ¿ Vir, whose peculiar stellar properties of the Am star components will permit direct testing of current theories of tidal evolution when the full orbit is determined.

Original language	English
Pages (from-to)	L57-L60
Number of pages	4
Journal	The Astrophysical Journal Letters
Volume	602
Issue number	1
Publication status	Published - 1 Feb 2004

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Monnier, J. D., Traub, W. A., Schloerb, F. P., Millan-Gabet, R., Berger, J.-P., Pedretti, E., Carleton, N. P., Kraus, S., Lacasse, M. G., Brewer, M., Ragland, S., Ahearn, A., Coldwell, C., Haguenauer, P., Kern, P., Labeye, P., Lagny, L., Malbet, F., Malin, D., ... Wallace, G. (2004). First Results with the IOTA3 Imaging Interferometer: The Spectroscopic Binaries ¿ Virginis and WR 140. The Astrophysical Journal Letters, 602(1), L57-L60. http://adsabs.harvard.edu/abs/2004ApJ...602L..57M

@article{f62a70684e4046718432fda877d0598a,

title = "First Results with the IOTA3 Imaging Interferometer: The Spectroscopic Binaries ¿ Virginis and WR 140",

abstract = "We report the first spatially resolved observations of the spectroscopic binaries ¿ Vir and WR 140, including the debut of aperture-synthesis imaging with the upgraded three-telescope IOTA interferometer. Using IONIC-3, a new integrated optics beam combiner capable of a precise closure phase measurement, short observations were sufficient to extract the angular separation and orientation of each binary system and the component brightness ratio. Most notably, the underlying binary in the prototypical colliding-wind source WR 140 (WC7+O4/O5) was found to have a separation of ~13 mas with a position angle of 152°, consistent with previous interpretations of the 2001 dust shell ejection only if the Wolf-Rayet star is fainter than the O star at 1.65 ¿m. We also highlight ¿ Vir, whose peculiar stellar properties of the Am star components will permit direct testing of current theories of tidal evolution when the full orbit is determined.",

author = "Monnier, {J. D.} and Traub, {W. A.} and Schloerb, {F. P.} and R. Millan-Gabet and J.-P. Berger and E. Pedretti and Carleton, {N. P.} and S. Kraus and Lacasse, {M. G.} and M. Brewer and S. Ragland and A. Ahearn and C. Coldwell and P. Haguenauer and P. Kern and P. Labeye and L. Lagny and F. Malbet and D. Malin and P. Maymounkov and S. Morel and C. Papaliolios and K. Perraut and M. Pearlman and Porro, {I. L.} and I. Schanen and K. Souccar and G. Torres and G. Wallace",

year = "2004",

month = feb,

day = "1",

language = "English",

volume = "602",

pages = "L57--L60",

journal = "The Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "1",

}

Monnier, JD, Traub, WA, Schloerb, FP, Millan-Gabet, R, Berger, J-P, Pedretti, E, Carleton, NP, Kraus, S, Lacasse, MG, Brewer, M, Ragland, S, Ahearn, A, Coldwell, C, Haguenauer, P, Kern, P, Labeye, P, Lagny, L, Malbet, F, Malin, D, Maymounkov, P, Morel, S, Papaliolios, C, Perraut, K, Pearlman, M, Porro, IL, Schanen, I, Souccar, K, Torres, G & Wallace, G 2004, 'First Results with the IOTA3 Imaging Interferometer: The Spectroscopic Binaries ¿ Virginis and WR 140', The Astrophysical Journal Letters, vol. 602, no. 1, pp. L57-L60. <http://adsabs.harvard.edu/abs/2004ApJ...602L..57M>

TY - JOUR

T1 - First Results with the IOTA3 Imaging Interferometer: The Spectroscopic Binaries ¿ Virginis and WR 140

AU - Monnier, J. D.

AU - Traub, W. A.

AU - Schloerb, F. P.

AU - Millan-Gabet, R.

AU - Berger, J.-P.

AU - Pedretti, E.

AU - Carleton, N. P.

AU - Kraus, S.

AU - Lacasse, M. G.

AU - Brewer, M.

AU - Ragland, S.

AU - Ahearn, A.

AU - Coldwell, C.

AU - Haguenauer, P.

AU - Kern, P.

AU - Labeye, P.

AU - Lagny, L.

AU - Malbet, F.

AU - Malin, D.

AU - Maymounkov, P.

AU - Morel, S.

AU - Papaliolios, C.

AU - Perraut, K.

AU - Pearlman, M.

AU - Porro, I. L.

AU - Schanen, I.

AU - Souccar, K.

AU - Torres, G.

AU - Wallace, G.

PY - 2004/2/1

Y1 - 2004/2/1

N2 - We report the first spatially resolved observations of the spectroscopic binaries ¿ Vir and WR 140, including the debut of aperture-synthesis imaging with the upgraded three-telescope IOTA interferometer. Using IONIC-3, a new integrated optics beam combiner capable of a precise closure phase measurement, short observations were sufficient to extract the angular separation and orientation of each binary system and the component brightness ratio. Most notably, the underlying binary in the prototypical colliding-wind source WR 140 (WC7+O4/O5) was found to have a separation of ~13 mas with a position angle of 152°, consistent with previous interpretations of the 2001 dust shell ejection only if the Wolf-Rayet star is fainter than the O star at 1.65 ¿m. We also highlight ¿ Vir, whose peculiar stellar properties of the Am star components will permit direct testing of current theories of tidal evolution when the full orbit is determined.

AB - We report the first spatially resolved observations of the spectroscopic binaries ¿ Vir and WR 140, including the debut of aperture-synthesis imaging with the upgraded three-telescope IOTA interferometer. Using IONIC-3, a new integrated optics beam combiner capable of a precise closure phase measurement, short observations were sufficient to extract the angular separation and orientation of each binary system and the component brightness ratio. Most notably, the underlying binary in the prototypical colliding-wind source WR 140 (WC7+O4/O5) was found to have a separation of ~13 mas with a position angle of 152°, consistent with previous interpretations of the 2001 dust shell ejection only if the Wolf-Rayet star is fainter than the O star at 1.65 ¿m. We also highlight ¿ Vir, whose peculiar stellar properties of the Am star components will permit direct testing of current theories of tidal evolution when the full orbit is determined.

M3 - Article

SN - 2041-8205

VL - 602

SP - L57-L60

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

IS - 1

ER -

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

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