A Herschel resolved debris disc around HD 105211
Article
Article Title | A Herschel resolved debris disc around HD 105211 |
---|---|
ERA Journal ID | 1074 |
Article Category | Article |
Authors | Hengst, S. (Author), Marshall, J. P. (Author), Horner, J. (Author) and Marsden, S. C. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 468 (4), pp. 4725-4734 |
Number of Pages | 10 |
Year | 2017 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stx753 |
Web Address (URL) | https://academic.oup.com/mnras/article/468/4/4725/3092372 |
Abstract | Debris discs are the dusty aftermath of planet formation processes around main-sequence stars. Analysis of these discs is often hampered by the absence of any meaningful constraint on the location and spatial extent of the disc around its host star. Multi-wavelength, resolved imaging ameliorates the degeneracies inherent in the modelling process, making such data indispensable in the interpretation of these systems. The Herschel Space Observatory observed HD 105211 (Eta Cru, HIP 59072) with its PACS instrument in three far-infrared wavebands (70, 100 and 160 um). Here we combine these data with ancillary photometry spanning optical to far-infrared wavelengths in order to determine the extent of the circumstellar disc. The spectral energy distribution and multi-wavelength resolved emission of the disc are simultaneously modelled using a radiative transfer and imaging codes. Analysis of the Herschel/PACS images reveals the presence of extended structure in all three PACS images. From a radiative transfer model we derive a disc extent of 87.0 +/- 2.5 au, with an inclination of 70.7 +/- 2.2 degrees to the line of sight and a position angle of 30.1 +/- 0.5 degrees. Deconvolution of the Herschel images reveal a potential asymmetry but this remains uncertain as a combined radiative transfer and image analysis replicate both the structure and the emission of the disc using a single axisymmetric annulus. |
Keywords | earth and planetary astrophysics, solar and stellar astrophysics |
Related Output | |
Is part of | Dust Grain Dynamics in Debris Discs |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
This article is part of a UniSQ Thesis by publication. See Related Output. | |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3z0w/a-herschel-resolved-debris-disc-around-hd-105211
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