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Revealing asymmetrical dust distribution in the inner regions of HD 141569

hal.structure.identifierMax Planck Institute for the Structure and Dynamics of Matter [MPSD]
dc.contributor.authorSINGH, G.
dc.contributor.authorBHOWMIK, T.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
dc.contributor.authorBOCCALETTI, A.
hal.structure.identifierLaboratoire Bordelais de Recherche en Informatique [LaBRI]
hal.structure.identifierCentre de Bioinformatique de Bordeaux [CBIB]
dc.contributor.authorTHÉBAULT, P.
dc.contributor.authorKRAL, Q.
hal.structure.identifierEuropean Southern Observatory [Santiago] [ESO]
dc.contributor.authorMILLI, J.
dc.contributor.authorMAZOYER, J.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR_7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorPANTIN, E.
hal.structure.identifierLeiden Observatory [Leiden]
dc.contributor.authorVAN HOLSTEIN, R. G.
hal.structure.identifierMax-Planck-Institut für Astronomie [MPIA]
dc.contributor.authorOLOFSSON, J.
dc.contributor.authorBOUKROUCHE, R.
hal.structure.identifierAMOR 2017
dc.contributor.authorDI FOLCO, E.
hal.structure.identifierDepartment of Astronomy
dc.contributor.authorJANSON, M.
hal.structure.identifierLaboratoire d'Astrophysique de Marseille [LAM]
hal.structure.identifierCentre de Recherche Astrophysique de Lyon [CRAL]
dc.contributor.authorLANGLOIS, M.
hal.structure.identifierINAF - Osservatorio Astronomico di Padova [OAPD]
dc.contributor.authorMAIRE, A.-L.
hal.structure.identifierLaboratoire d'Astrophysique de Marseille [LAM]
dc.contributor.authorVIGAN, A.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorBENISTY, M.
dc.contributor.authorAUGEREAU, J.-C.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
dc.contributor.authorPERROT, C.
hal.structure.identifierINAF - Osservatorio Astronomico di Padova [OAPD]
dc.contributor.authorGRATTON, R.
hal.structure.identifierMax-Planck-Institut für Astronomie [MPIA]
dc.contributor.authorHENNING, T.
hal.structure.identifierObservatoire des Sciences de l'Univers de Grenoble [OSUG ]
dc.contributor.authorMÉNARD, F.
hal.structure.identifierObservatoire Astronomique de l'Université de Genève [ObsGE]
dc.contributor.authorRICKMAN, E.
hal.structure.identifierEuropean Southern Observatory [Santiago] [ESO]
dc.contributor.authorWAHHAJ, Z.
hal.structure.identifierLaboratoire d'Astrophysique de Marseille [LAM]
dc.contributor.authorZURLO, A.
dc.contributor.authorBILLER, B.
hal.structure.identifierObservatoire des Sciences de l'Univers de Grenoble [OSUG ]
dc.contributor.authorBONNEFOY, M.
hal.structure.identifierObservatoire des Sciences de l'Univers de Grenoble [OSUG ]
dc.contributor.authorCHAUVIN, G.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorDELORME, P.
hal.structure.identifierINAF - Osservatorio Astronomico di Padova [OAPD]
dc.contributor.authorDESIDERA, S.
hal.structure.identifierINAF - Osservatorio Astronomico di Padova [OAPD]
dc.contributor.authorD’ORAZI, V.
hal.structure.identifierMax-Planck-Institut für Astronomie [MPIA]
dc.contributor.authorFELDT, M.
hal.structure.identifierGeneva Observatory
dc.contributor.authorHAGELBERG, J.
dc.contributor.authorKEPPLER, M.
hal.structure.identifierMax-Planck-Institut für Astronomie [MPIA]
dc.contributor.authorKOPYTOVA, T.
hal.structure.identifierJoseph Louis LAGRANGE [LAGRANGE]
dc.contributor.authorLAGADEC, E.
dc.contributor.authorLAGRANGE, A.-M.
hal.structure.identifierINAF - Osservatorio Astronomico di Padova [OAPD]
dc.contributor.authorMESA, D.
dc.contributor.authorMEYER, M.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
dc.contributor.authorROUAN, D.
hal.structure.identifierINAF - Osservatorio Astronomico di Padova [OAPD]
dc.contributor.authorSISSA, E.
hal.structure.identifierWestfälische Wilhelms-Universität Münster = University of Münster [WWU]
dc.contributor.authorSCHMIDT, T. O. B.
hal.structure.identifierLaboratoire d'Astrophysique de Marseille [LAM]
dc.contributor.authorJAQUET, M.
hal.structure.identifierLaboratoire d'Astrophysique de Marseille [LAM]
hal.structure.identifierDOTA, ONERA, Université Paris Saclay [Palaiseau]
dc.contributor.authorFUSCO, Thierry
hal.structure.identifierBulgarian Academy of Sciences [BAS]
dc.contributor.authorPAVLOV, A.
hal.structure.identifierObservatoire des Sciences de l'Univers de Grenoble [OSUG ]
dc.contributor.authorRABOU, P.
dc.date.issued2021
dc.identifier.issn0004-6361
dc.description.abstractEnContext. The combination of high-contrast imaging with spectroscopy and polarimetry offers a pathway to studying the grain distribution and properties of debris disks in exquisite detail. Here, we focus on the case of a gas-rich debris disk around HD 141569A, which features a multiple-ring morphology first identified with SPHERE in the near-infrared.Aims. We obtained polarimetric differential imaging with SPHERE in the H-band to compare the scattering properties of the innermost ring at 44 au with former observations in total intensity with the same instrument. In polarimetric imaging, we observed that the intensity of the ring peaks in the south-east, mostly in the forward direction, whereas in total intensity imaging, the ring is detected only at the south. This noticeable characteristic suggests a non-uniform dust density in the ring. With these two sets of images, we aim to study the distribution of the dust to solve for the actual dust distribution.Methods. We implemented a density function varying azimuthally along the ring and generated synthetic images both in polarimetry and in total intensity, which are then compared to the actual data. The search for the best-fit model was performed both with a grid-based and an MCMC approach. Using the outcome of this modelization, we further measured the polarized scattering phase function for the observed scattering angle between 33° and 147° as well as the spectral reflectance of the southern part of the ring between 0.98 and 2.1 μm. We tentatively derived the grain properties by comparing these quantities with MCFOST models and assuming Mie scattering.Results. We find that the dust density peaks in the south-west at an azimuthal angle of 220°~238° with a rather broad width of 61°~127°. The difference in the intensity distributions observed in polarimetry and total intensity is the result of this particular morphology. Although there are still uncertainties that remain in the determination of the anisotropic scattering factor, the implementation of an azimuthal density variation to fit the data proved to be robust. Upon elaborating on the origin of this dust density distribution, we conclude that it could be the result of a massive collision when we account for the effect of the high gas mass that is present in the system on the dynamics of grains. In terms of grain composition, our preliminary interpretation indicates a mixture of porous sub-micron sized astro-silicate and carbonaceous grains.Conclusions. The SPHERE observations have allowed, for the first time, for meaningful constraints to be placed on the dust distribution beyond the standard picture of a uniform ring-like debris disk. However, future studies with a multiwavelength approach and additional detailed modeling would be required to better characterize the grain properties in the HD 141569 system.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enstars: individual: HD 141569A
dc.subject.enprotoplanetary disks
dc.subject.enplanet-disk interactions
dc.subject.enstars: early-type
dc.subject.entechniques: high angular resolution
dc.subject.entechniques: polarimetric
dc.subject.enstars: individual: HD 141569A
dc.title.enRevealing asymmetrical dust distribution in the inner regions of HD 141569
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202140319
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA79
bordeaux.volume653
bordeaux.peerReviewedoui
hal.identifierhal-03341514
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03341514v1
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