Multi-epoch Near-infrared Interferometry of the Spatially Resolved Disk around the Be Star $ Tau

G.~H. Schaefer; D.~R. Gies; J.~D. Monnier; N.~D. Richardson; Y. Touhami; M. Zhao; X. Che; E. Pedretti; N. Thureau; T. ten Brummelaar; H.~A. McAlister; S.~T. Ridgway; J. Sturmann; L. Sturmann; N.~H. Turner; C.~D. Farrington; P.~J. Goldfinger

doi:10.1088/0004-6256/140/6/1838

Multi-epoch Near-infrared Interferometry of the Spatially Resolved Disk around the Be Star $ Tau

G.~H. Schaefer, D.~R. Gies, J.~D. Monnier, N.~D. Richardson, Y. Touhami, M. Zhao, X. Che, E. Pedretti, N. Thureau, T. ten Brummelaar, H.~A. McAlister, S.~T. Ridgway, J. Sturmann, L. Sturmann, N.~H. Turner, C.~D. Farrington, P.~J. Goldfinger

School of Engineering & Physical Sciences

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

32 Citations (Scopus)

Abstract

We present interferometric observations of the Be star ζ Tau obtained using the MIRC beam combiner at the CHARA Array. We resolved the disk during four epochs in 2007-2009. We fit the data with a geometric model to characterize the circumstellar disk as a skewed elliptical Gaussian and the central Be star as a uniform disk. The visibilities reveal a nearly edge-on disk with an FWHM major axis of ~1.8 mas in the H band. The non-zero closure phases indicate an asymmetry within the disk. Interestingly, when combining our results with previously published interferometric observations of ζ Tau, we find a correlation between the position angle of the disk and the spectroscopic V/R ratio, suggesting that the tilt of the disk is precessing. This work is part of a multi-year monitoring campaign to investigate the development and outward motion of asymmetric structures in the disks of Be stars.

Original language	English
Pages (from-to)	1838-1849
Number of pages	12
Journal	Astronomical Journal
Volume	140
DOIs	https://doi.org/10.1088/0004-6256/140/6/1838
Publication status	Published - 9 Nov 2010

Keywords

circumstellar matter, stars: emission-line, Be, stars: individual: $ Tau, techniques: interferometric

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10.1088/0004-6256/140/6/1838

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Schaefer, G. H., Gies, D. R., Monnier, J. D., Richardson, N. D., Touhami, Y., Zhao, M., Che, X., Pedretti, E., Thureau, N., ten Brummelaar, T., McAlister, H. A., Ridgway, S. T., Sturmann, J., Sturmann, L., Turner, N. H., Farrington, C. D., & Goldfinger, P. J. (2010). Multi-epoch Near-infrared Interferometry of the Spatially Resolved Disk around the Be Star $ Tau. Astronomical Journal, 140, 1838-1849. https://doi.org/10.1088/0004-6256/140/6/1838

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title = "Multi-epoch Near-infrared Interferometry of the Spatially Resolved Disk around the Be Star \$ Tau",

abstract = "We present interferometric observations of the Be star ζ Tau obtained using the MIRC beam combiner at the CHARA Array. We resolved the disk during four epochs in 2007-2009. We fit the data with a geometric model to characterize the circumstellar disk as a skewed elliptical Gaussian and the central Be star as a uniform disk. The visibilities reveal a nearly edge-on disk with an FWHM major axis of \textasciitilde{}1.8 mas in the H band. The non-zero closure phases indicate an asymmetry within the disk. Interestingly, when combining our results with previously published interferometric observations of ζ Tau, we find a correlation between the position angle of the disk and the spectroscopic V/R ratio, suggesting that the tilt of the disk is precessing. This work is part of a multi-year monitoring campaign to investigate the development and outward motion of asymmetric structures in the disks of Be stars.",

keywords = "circumstellar matter, stars: emission-line, Be, stars: individual: \$ Tau, techniques: interferometric",

author = "G.\textasciitilde{}H. Schaefer and D.\textasciitilde{}R. Gies and J.\textasciitilde{}D. Monnier and N.\textasciitilde{}D. Richardson and Y. Touhami and M. Zhao and X. Che and E. Pedretti and N. Thureau and \{ten Brummelaar\}, T. and H.\textasciitilde{}A. McAlister and S.\textasciitilde{}T. Ridgway and J. Sturmann and L. Sturmann and N.\textasciitilde{}H. Turner and C.\textasciitilde{}D. Farrington and P.\textasciitilde{}J. Goldfinger",

year = "2010",

month = nov,

day = "9",

doi = "10.1088/0004-6256/140/6/1838",

language = "English",

volume = "140",

pages = "1838--1849",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

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Schaefer, GH, Gies, DR, Monnier, JD, Richardson, ND, Touhami, Y, Zhao, M, Che, X, Pedretti, E, Thureau, N, ten Brummelaar, T, McAlister, HA, Ridgway, ST, Sturmann, J, Sturmann, L, Turner, NH, Farrington, CD & Goldfinger, PJ 2010, 'Multi-epoch Near-infrared Interferometry of the Spatially Resolved Disk around the Be Star $ Tau', Astronomical Journal, vol. 140, pp. 1838-1849. https://doi.org/10.1088/0004-6256/140/6/1838

TY - JOUR

T1 - Multi-epoch Near-infrared Interferometry of the Spatially Resolved Disk around the Be Star $ Tau

AU - Schaefer, G.~H.

AU - Gies, D.~R.

AU - Monnier, J.~D.

AU - Richardson, N.~D.

AU - Touhami, Y.

AU - Zhao, M.

AU - Che, X.

AU - Pedretti, E.

AU - Thureau, N.

AU - ten Brummelaar, T.

AU - McAlister, H.~A.

AU - Ridgway, S.~T.

AU - Sturmann, J.

AU - Sturmann, L.

AU - Turner, N.~H.

AU - Farrington, C.~D.

AU - Goldfinger, P.~J.

PY - 2010/11/9

Y1 - 2010/11/9

N2 - We present interferometric observations of the Be star ζ Tau obtained using the MIRC beam combiner at the CHARA Array. We resolved the disk during four epochs in 2007-2009. We fit the data with a geometric model to characterize the circumstellar disk as a skewed elliptical Gaussian and the central Be star as a uniform disk. The visibilities reveal a nearly edge-on disk with an FWHM major axis of ~1.8 mas in the H band. The non-zero closure phases indicate an asymmetry within the disk. Interestingly, when combining our results with previously published interferometric observations of ζ Tau, we find a correlation between the position angle of the disk and the spectroscopic V/R ratio, suggesting that the tilt of the disk is precessing. This work is part of a multi-year monitoring campaign to investigate the development and outward motion of asymmetric structures in the disks of Be stars.

AB - We present interferometric observations of the Be star ζ Tau obtained using the MIRC beam combiner at the CHARA Array. We resolved the disk during four epochs in 2007-2009. We fit the data with a geometric model to characterize the circumstellar disk as a skewed elliptical Gaussian and the central Be star as a uniform disk. The visibilities reveal a nearly edge-on disk with an FWHM major axis of ~1.8 mas in the H band. The non-zero closure phases indicate an asymmetry within the disk. Interestingly, when combining our results with previously published interferometric observations of ζ Tau, we find a correlation between the position angle of the disk and the spectroscopic V/R ratio, suggesting that the tilt of the disk is precessing. This work is part of a multi-year monitoring campaign to investigate the development and outward motion of asymmetric structures in the disks of Be stars.

KW - circumstellar matter, stars: emission-line, Be, stars: individual: $ Tau, techniques: interferometric

U2 - 10.1088/0004-6256/140/6/1838

DO - 10.1088/0004-6256/140/6/1838

M3 - Article

SN - 0004-6256

VL - 140

SP - 1838

EP - 1849

JO - Astronomical Journal

JF - Astronomical Journal

ER -

Multi-epoch Near-infrared Interferometry of the Spatially Resolved Disk around the Be Star $ Tau

Abstract

Keywords

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