Probing Dust Grain Evolution in IM Lupi’s Circumstellar Disc Multi-Wavelength Observations and Modelling of the Dust Disc

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dc.contributor.author Silverstone, Murray
dc.date.accessioned 2019-06-17T19:52:39Z
dc.date.available 2019-06-17T19:52:39Z
dc.date.copyright 2008
dc.date.issued 2008-08-08
dc.identifier.citation Pinte, C., et al. (2008): Probing Dust Grain Evolution in IM Lupi’s Circumstellar Disc Multi-Wavelength Observations and Modelling of the Dust Disc. Astronomy and Astrophysics, 489(2). DOI: https://doi.org/10.1051/0004-6361:200810121 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/5775
dc.description.abstract Aims. We present a panchromatic study, involving a multiple technique approach, of the circumstellar disc surrounding the T Tauri star IM Lupi (Sz 82). Methods. We have undertaken a comprehensive observational study of IM Lupi using photometry, spectroscopy, millimetre interferometry and multi-wavelength imaging. For the first time, the disc is resolved from optical and near-infrared wavelengths in scattered light, to the millimetre regime in thermal emission. Our data-set, in conjunction with existing photometric data, provides an extensive coverage of the spectral energy distribution, including a detailed spectrum of the silicate emission bands. We have performed a simultaneous modelling of the various observations, using the radiative transfer code MCFOST, and analysed a grid of models over a large fraction of the parameter space via Bayesian inference. Results. We have constructed a model that can reproduce all of the observations of the disc. Our analysis illustrates the importance of combining a wide range of observations in order to fully constrain the disc model, with each observation providing a strong constraint only on some aspects of the disc structure and dust content. Quantitative evidence of dust evolution in the disc is obtained: grain growth up to millimetre-sized particles, vertical stratification of dust grains with micrometric grains close to the disc surface and larger grains which have settled towards the disc midplane, and possibly the formation of fluffy aggregates and/or ice mantles around grains. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.publisher EDP Sciences en_US
dc.subject Circumstellar matter en_US
dc.subject Pulsars individual IM Lupi en_US
dc.subject Protoplanetary disks en_US
dc.subject Radiative transfer en_US
dc.subject Accretion disks en_US
dc.title Probing Dust Grain Evolution in IM Lupi’s Circumstellar Disc Multi-Wavelength Observations and Modelling of the Dust Disc en_US
dc.type text en_US
dc.rights.holder ESO en_US


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