Resolved imaging of the AR Puppis circumbinary disk

S. Ertel, D. Kamath, M. Hillen, H. Van Winckel, J. Okumura, R. Manick, H. M. J. Boffin, J. Milli, G. H.-M. Bertrang, L. Guzman-Ramirez, J. Horner, J. P. Marshall, P. Scicluna, A. Vaz, E. Villaver, R. Wesson, S. Xu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Circumbinary disks are common around post-asymptotic giant branch (post-AGB) stars with a stellar companion on orbital timescales of a few 100 to few 1000 days. The presence of a disk is usually inferred from the system's spectral energy distribution and confirmed, for a sub-sample, by interferometric observations. We used the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument on the Very Large Telescope to obtain extreme adaptive optics assisted scattered light images of the post-AGB binary system AR Puppis. Data have been obtained in the V, I, and H bands. Our observations have produced the first resolved images of AR Puppis's circumbinary disk and confirm its edge-on orientation. In our high-angular-resolution and high-dynamic-range images we identify several structural components such as a dark mid-plane, the disk surface, and arc-like features. We discuss the nature of these components and use complementary photometric monitoring to relate them to the orbital phase of the binary system. Because the star is completely obscured by the disk at visible wavelengths, we conclude that the long-term photometric variability of the system must be caused by variable scattering, not extinction, of starlight by the disk over the binary orbit. Finally, we discuss how the short disk lifetimes and fast evolution of the host stars compared to the ages at which protoplanetary disks are typically observed make systems like AR Puppis valuable extreme laboratories to study circumstellar disk evolution and constrain the timescale of dust grain growth during the planet formation process.

LanguageEnglish
Article number110
Pages1-13
Number of pages13
JournalAstronomical Journal
Volume157
Issue number3
DOIs
Publication statusPublished - 12 Feb 2019

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timescale
structural component
planet
extinction
scattering
dust
wavelength
monitoring
stars
orbitals
protoplanetary disks
energy
asymptotic giant branch stars
extrasolar planets
spectral energy distribution
extremely high frequencies
angular resolution
adaptive optics
dynamic range
planets

Bibliographical note

Copyright 2019 The American Astronomical Society. First published in the Astronomical Journal, 157(3), 110, 2019, published by IOP Publishing. The original publication is available at http://www.doi.org/10.3847/1538-3881/aafe04. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • binaries: close
  • circumstellar matter
  • planetary systems
  • stars: AGB and post-AGB
  • stars: individual (AR, Pup)

Cite this

Ertel, S., Kamath, D., Hillen, M., Van Winckel, H., Okumura, J., Manick, R., ... Xu, S. (2019). Resolved imaging of the AR Puppis circumbinary disk. Astronomical Journal, 157(3), 1-13. [110]. https://doi.org/10.3847/1538-3881/aafe04
Ertel, S. ; Kamath, D. ; Hillen, M. ; Van Winckel, H. ; Okumura, J. ; Manick, R. ; Boffin, H. M. J. ; Milli, J. ; Bertrang, G. H.-M. ; Guzman-Ramirez, L. ; Horner, J. ; Marshall, J. P. ; Scicluna, P. ; Vaz, A. ; Villaver, E. ; Wesson, R. ; Xu, S. / Resolved imaging of the AR Puppis circumbinary disk. In: Astronomical Journal. 2019 ; Vol. 157, No. 3. pp. 1-13.
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abstract = "Circumbinary disks are common around post-asymptotic giant branch (post-AGB) stars with a stellar companion on orbital timescales of a few 100 to few 1000 days. The presence of a disk is usually inferred from the system's spectral energy distribution and confirmed, for a sub-sample, by interferometric observations. We used the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument on the Very Large Telescope to obtain extreme adaptive optics assisted scattered light images of the post-AGB binary system AR Puppis. Data have been obtained in the V, I, and H bands. Our observations have produced the first resolved images of AR Puppis's circumbinary disk and confirm its edge-on orientation. In our high-angular-resolution and high-dynamic-range images we identify several structural components such as a dark mid-plane, the disk surface, and arc-like features. We discuss the nature of these components and use complementary photometric monitoring to relate them to the orbital phase of the binary system. Because the star is completely obscured by the disk at visible wavelengths, we conclude that the long-term photometric variability of the system must be caused by variable scattering, not extinction, of starlight by the disk over the binary orbit. Finally, we discuss how the short disk lifetimes and fast evolution of the host stars compared to the ages at which protoplanetary disks are typically observed make systems like AR Puppis valuable extreme laboratories to study circumstellar disk evolution and constrain the timescale of dust grain growth during the planet formation process.",
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Ertel, S, Kamath, D, Hillen, M, Van Winckel, H, Okumura, J, Manick, R, Boffin, HMJ, Milli, J, Bertrang, GH-M, Guzman-Ramirez, L, Horner, J, Marshall, JP, Scicluna, P, Vaz, A, Villaver, E, Wesson, R & Xu, S 2019, 'Resolved imaging of the AR Puppis circumbinary disk', Astronomical Journal, vol. 157, no. 3, 110, pp. 1-13. https://doi.org/10.3847/1538-3881/aafe04

Resolved imaging of the AR Puppis circumbinary disk. / Ertel, S.; Kamath, D.; Hillen, M.; Van Winckel, H.; Okumura, J.; Manick, R.; Boffin, H. M. J.; Milli, J.; Bertrang, G. H.-M.; Guzman-Ramirez, L.; Horner, J.; Marshall, J. P.; Scicluna, P.; Vaz, A.; Villaver, E.; Wesson, R.; Xu, S.

In: Astronomical Journal, Vol. 157, No. 3, 110, 12.02.2019, p. 1-13.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Ertel, S.

AU - Kamath, D.

AU - Hillen, M.

AU - Van Winckel, H.

AU - Okumura, J.

AU - Manick, R.

AU - Boffin, H. M. J.

AU - Milli, J.

AU - Bertrang, G. H.-M.

AU - Guzman-Ramirez, L.

AU - Horner, J.

AU - Marshall, J. P.

AU - Scicluna, P.

AU - Vaz, A.

AU - Villaver, E.

AU - Wesson, R.

AU - Xu, S.

N1 - Copyright 2019 The American Astronomical Society. First published in the Astronomical Journal, 157(3), 110, 2019, published by IOP Publishing. The original publication is available at http://www.doi.org/10.3847/1538-3881/aafe04. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2019/2/12

Y1 - 2019/2/12

N2 - Circumbinary disks are common around post-asymptotic giant branch (post-AGB) stars with a stellar companion on orbital timescales of a few 100 to few 1000 days. The presence of a disk is usually inferred from the system's spectral energy distribution and confirmed, for a sub-sample, by interferometric observations. We used the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument on the Very Large Telescope to obtain extreme adaptive optics assisted scattered light images of the post-AGB binary system AR Puppis. Data have been obtained in the V, I, and H bands. Our observations have produced the first resolved images of AR Puppis's circumbinary disk and confirm its edge-on orientation. In our high-angular-resolution and high-dynamic-range images we identify several structural components such as a dark mid-plane, the disk surface, and arc-like features. We discuss the nature of these components and use complementary photometric monitoring to relate them to the orbital phase of the binary system. Because the star is completely obscured by the disk at visible wavelengths, we conclude that the long-term photometric variability of the system must be caused by variable scattering, not extinction, of starlight by the disk over the binary orbit. Finally, we discuss how the short disk lifetimes and fast evolution of the host stars compared to the ages at which protoplanetary disks are typically observed make systems like AR Puppis valuable extreme laboratories to study circumstellar disk evolution and constrain the timescale of dust grain growth during the planet formation process.

AB - Circumbinary disks are common around post-asymptotic giant branch (post-AGB) stars with a stellar companion on orbital timescales of a few 100 to few 1000 days. The presence of a disk is usually inferred from the system's spectral energy distribution and confirmed, for a sub-sample, by interferometric observations. We used the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument on the Very Large Telescope to obtain extreme adaptive optics assisted scattered light images of the post-AGB binary system AR Puppis. Data have been obtained in the V, I, and H bands. Our observations have produced the first resolved images of AR Puppis's circumbinary disk and confirm its edge-on orientation. In our high-angular-resolution and high-dynamic-range images we identify several structural components such as a dark mid-plane, the disk surface, and arc-like features. We discuss the nature of these components and use complementary photometric monitoring to relate them to the orbital phase of the binary system. Because the star is completely obscured by the disk at visible wavelengths, we conclude that the long-term photometric variability of the system must be caused by variable scattering, not extinction, of starlight by the disk over the binary orbit. Finally, we discuss how the short disk lifetimes and fast evolution of the host stars compared to the ages at which protoplanetary disks are typically observed make systems like AR Puppis valuable extreme laboratories to study circumstellar disk evolution and constrain the timescale of dust grain growth during the planet formation process.

KW - binaries: close

KW - circumstellar matter

KW - planetary systems

KW - stars: AGB and post-AGB

KW - stars: individual (AR, Pup)

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Ertel S, Kamath D, Hillen M, Van Winckel H, Okumura J, Manick R et al. Resolved imaging of the AR Puppis circumbinary disk. Astronomical Journal. 2019 Feb 12;157(3):1-13. 110. https://doi.org/10.3847/1538-3881/aafe04