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

doi:10.1086/382213

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

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

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Abstract

We report the first spatially resolved observations of the spectroscopic binaries λ 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 μm. We also highlight λ 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
Journal	Astrophysical Journal
Volume	602
Issue number	1
DOIs	https://doi.org/10.1086/382213
Publication status	Published - 29 Jan 2004

Keywords

Stars: Binaries: Spectroscopic, Instrumentation: Interferometers, Stars: Individual: Constellation Name: $ Virginis, Stars: Individual: Alphanumeric: WR 140, Techniques: Interferometric

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10.1086/382213

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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. Astrophysical Journal, 602(1), L57-L60. https://doi.org/10.1086/382213

@article{3199fdaad6d849358430aadc949459fc,

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 λ 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 μm. We also highlight λ 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.",

keywords = "Stars: Binaries: Spectroscopic, Instrumentation: Interferometers, Stars: Individual: Constellation Name: $ Virginis, Stars: Individual: Alphanumeric: WR 140, Techniques: Interferometric",

author = "J.~D. Monnier and W.~A. Traub and F.~P. Schloerb and R. Millan-Gabet and J.-P. Berger and E. Pedretti and N.~P. Carleton and S. Kraus and M.~G. Lacasse 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 I.~L. Porro and I. Schanen and K. Souccar and G. Torres and G. Wallace",

year = "2004",

month = jan,

day = "29",

doi = "10.1086/382213",

language = "English",

volume = "602",

pages = "L57--L60",

journal = "Astrophysical Journal",

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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', Astrophysical Journal, vol. 602, no. 1, pp. L57-L60. https://doi.org/10.1086/382213

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 - 2004/1/29

Y1 - 2004/1/29

N2 - We report the first spatially resolved observations of the spectroscopic binaries λ 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 μm. We also highlight λ 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 λ 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 μm. We also highlight λ 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.

KW - Stars: Binaries: Spectroscopic, Instrumentation: Interferometers, Stars: Individual: Constellation Name: $ Virginis, Stars: Individual: Alphanumeric: WR 140, Techniques: Interferometric

U2 - 10.1086/382213

DO - 10.1086/382213

M3 - Article

SN - 0004-637X

VL - 602

SP - L57-L60

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

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

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Keywords

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