Second-generation protoplanetary discs around evolved binaries: a high-resolution polarimetric view with SPHERE/IRDIS

Abstract

Binary post-asymptotic giant branch (post-AGB) stars are products of a poorly understood binary interaction process that occurs during the AGB phase. These systems comprise of a post-AGB primary star, a main-sequence secondary companion and a stable circumbinary disc. Studying the structure and properties of these circumbinary discs is crucial for gaining insight into the binary interaction process that governs post-AGB binaries as well as comprehending the disc's creation, evolution, and its interaction with the post-AGB binary system. We aim to use near-infrared polarimetric imaging to investigate the morphology and potential substructures of circumbinary discs around eight representative post-AGB binary stars. To achieve this, we performed polarimetric differential imaging in H and Y bands using the high-angular resolution capabilities of the European Southern Observatory-Very Large Telescope/SPHERE-Infra-Red Dual-beam Imaging and Spectroscopy instrument. We resolved the extended circumbinary disc structure for a diverse sample of eight post-AGB binary systems. Our analysis provided the first estimates of the disc scale-height for two of the systems: IW Car and IRAS 15469-5311. We also investigated the morphological differences between the full discs (with the inner rim at the dust sublimation radius) and transition discs (which are expected to have larger inner cavities), as well as similarities to protoplanetary disks around young stellar objects. We found that the transition discs displayed a more intricate and asymmetric configuration. Surprisingly, no correlation was found between the over-resolved flux in near-IR interferometric data and the polarimetric observations, suggesting that scattering of light on the disc surface may not be the primary cause of the observed over-resolved flux component.

References in corpus (64)

• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• Passive irradiated circumstellar disks with an inner hole
• SPHERE: the exoplanet imager for the Very Large Telescope
• ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: towards an understanding of dust processing
• Accretion Disks Around Young Objects. II. Tests of Well-Mixed Models with Ism Dust
• Disks ARound TTauri Stars with Sphere (DARTTS-S) I: Sphere / IRDIS Polarimetric Imaging of 8 prominent TTauri Disks
• Resolved gas cavities in transitional disks inferred from CO isotopologues with ALMA
• Keplerian discs around post-AGB stars: a common phenomenon?
• Identifying gaps in flaring Herbig Ae/Be disks using spatially resolved mid-infrared imaging. Are all group I disks transitional?
• Post-AGB stars with hot circumstellar dust: binarity of the low-amplitude pulsators
• The polarimetric imaging mode of VLT/SPHERE/IRDIS II: Characterization and correction of instrumental polarization effects
• Fingerprints of giant planets in the photospheres of Herbig stars
• Orbital properties of binary post-AGB stars
• The polarimetric imaging mode of VLT/SPHERE/IRDIS I: Description, data reduction and observing strategy
• Optically visible post-AGB/RGB stars and young stellar objects in the Small Magellanic Cloud: candidate selection, spectral energy distributions and spectroscopic examination
• Multiple rings in the transition disk and companion candidates around RXJ1615.3-3255. High contrast imaging with VLT/SPHERE
• The SPHERE view of the planet-forming disk around HD100546
• Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO
• Optically Visible Post-AGB Stars, Post-RGB Stars and Young Stellar Objects in the Large Magellanic Cloud
• Why circumstellar disks are so faint in scattered light: The case of HD 100546
• The structure of disks around intermediate-mass young stars from mid-infrared interferometry. Evidence for a population of group II disks with gaps
• Silicate features in Galactic and extragalactic post-AGB discs
• The WISE View of RV Tauri Stars
• A newly discovered stellar type: dusty post-red giant branch stars in the Magellanic Clouds
• Abundance Analyses of Field RV Stars, V: DS Aquarii, UY Arae, TW Camelopardis, BT Librae, U Moncerotis, TT Ophiuchi, and RV Tauri
• Non-azimuthal linear polarization in protoplanetary disks
• Depletion in post-AGB stars with a dusty disc. II
• Imaging the dust sublimation front of a circumbinary disk
• Predicting the Fate of Binary Red Giants Using the Observed Sequence E Star Population: Binary Planetary Nebula Nuclei and Post-RGB Stars
• Establishing binarity amongst Galactic RV Tauri stars with a disc
• Fingerprints of giant planets in the composition of solar twins
• A population of transition disks around evolved stars: Fingerprints of planets? Catalog of disks surrounding Galactic post-AGB binaries
• The dust disk of HR4049
• Defining the instability strip of pulsating post-AGB binary stars from ASAS and NSVS photometry
• Strong dust processing in circumstellar discs around 6 RV Tauri stars. Are dusty RV Tauri stars all binaries?
• Detection of Keplerian dynamics in a disk around the post-AGB star AC Her
• High-resolution observations of IRAS 08544-4431. Detection of a disk orbiting a post-AGB star and of a slow disk wind
• A mid-IR interferometric survey with MIDI/VLTI: resolving the second-generation protoplanetary disks around post-AGB binaries
• First detection of surface magnetic fields in Post-AGB stars : the cases of U Monocerotis and R Scuti
• A second post-AGB nebula that contains gas in rotation and in expansion: ALMA maps of IW Car
• IRAS 08544-4431 : a new post-AGB star in a binary system surrounded by a dusty disc
• Modelling depletion by re-accretion of gas from a dusty disc in post-AGB stars
• The evolved circumbinary disk of AC Her: a radiative transfer, interferometric and mineralogical study
• Jet creation in post-AGB binaries: the circum-companion accretion disc around BD+46${}^{\circ }$442
• HD142527: Quantitative disk polarimetry with SPHERE
• The perturbed sublimation rim of the dust disk around the post-AGB binary IRAS08544-4431
• VLTI/PIONIER survey of disks around post-AGB binaries. Dust sublimation physics rules!
• Disc-binary interactions in depleted post-AGB binaries
• AGB dust and gas ejecta in extremely metal-poor environments
• Keplerian disks and outflows in post-AGB stars: AC Herculis, 89 Herculis, IRAS 19125+0343, and R Scuti
• The structure of jets launched from post-AGB binary systems
• Infrared High-Resolution Spectroscopy of Post-AGB Circumstellar Disks. I. HR 4049 - The Winnowing Flow Observed?
• Amplitude variations of modulated RV Tauri stars support the dust obscuration model of the RVb phenomenon
• Evidence for Binarity and Possible Disk Obscuration in Kepler Observations of the Pulsating RV Tau Variable DF Cygni
• Resolved imaging of the AR Puppis circumbinary disk
• Physical properties of galactic RV Tauri stars from Gaia DR2 data
• The Gas-Rich Circumbinary Disk of HR 4049 I: A Detailed Study of the Mid-Infrared Spectrum
• Rapid grain growth in post-AGB disc systems from far-infrared and sub-millimetre photometry
• Chemical composition of A--F type post-AGB candidates
• Multi-wavelength VLTI study of the puffed-up inner rim of a circumbinary disc
• Multiwavelength Observations of the RV Tauri Variable System U Monocerotis: Long-Term Variability Phenomena That Can Be Explained by Binary Interactions with a Circumbinary Disk
• The Gas-Rich Circumbinary Disk of HR 4049. II: A Detailed Study of the Near-Infrared Spectrum
• Nano-diamonds in proto-planetary discs: Life on the edge
• VLTI images of circumbinary disks around evolved stars

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• Multiwavelength high-resolution polarimetric imaging of second-generation disc around post-AGB binary IRAS 08544-4431 with SPHERE
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• Post-AGB Binaries as Interacting Systems
• Modelling the impact of circumbinary disk accretion on post-AGB binary evolution and surface chemistry
• SPHERE/ZIMPOL insights into discs around evolved stars: arcs, asymmetries and dust properties
• Resolution and calibration effects in high contrast polarimetric imaging of circumstellar scattering regions