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A multiwavelength study of the debris disc around 49 Cet

MPS-Authors

Pawellek,  Nicole
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Moór,  Attila
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Milli,  Julien
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kóspál,  Ágnes
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Olofsson,  Johan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ábrahám,  Péter
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Keppler,  Miriam
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kral,  Quentin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pohl,  Adriana
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Augereau,  Jean-Charles
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Boccaletti,  Anthony
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Chauvin,  Gaël
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Choquet,  Élodie
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Engler,  Natalia
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henning,  Thomas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Langlois,  Maud
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lee,  Eve J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ménard,  François
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Thébault,  Philippe
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zurlo,  Alice
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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Citation

Pawellek, N., Moór, A., Milli, J., Kóspál, Á., Olofsson, J., Ábrahám, P., et al. (2019). A multiwavelength study of the debris disc around 49 Cet. Monthly Notices of the Royal Astronomical Society, 488, 3507-3525.


Cite as: https://hdl.handle.net/21.11116/0000-0005-D2B0-6
Abstract
In a multiwavelength study of thermal emission and scattered light images we analyse the dust properties and structure of the debris disc around the A1-type main-sequence star 49 Cet. As a basis for this study, we present new scattered light images of the debris disc known to possess a high amount of both dust and gas. The outer region of the disc is revealed in former coronagraphic H-band and our new Y-band images from the Very Large Telescope SPHERE instrument. We use the knowledge of the disc's radial extent inferred from ALMA observations and the grain size distribution found by spectral energy distribution fitting to generate semidynamical dust models of the disc. We compare the models to scattered light and thermal emission data and find that a disc with a maximum surface density at 110 au and shallow edges can describe both the thermal emission and the scattered light observations. This suggests that grains close to the blow-out limit and large grains stem from the same planetesimal population and are mainly influenced by radiation pressure. The influence of inward transport processes could not be analysed in this study.