A Herschel resolved debris disc around HD 105211
作者： S. Hengst , J. P. Marshall , J. Horner , S. C. Marsden
DOI: 10.1093/MNRAS/STX753
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摘要: Debris discs are the dusty aftermath of planet formation processes around main-sequence stars. Analysis these is often hampered by absence any meaningful constraint on location and spatial extent disc its host star. Multi-wavelength, resolved imaging ameliorates degeneracies inherent in modelling process, making such data indispensable interpretation systems. The Herschel Space Observatory observed HD 105211 (Eta Cru, HIP 59072) with PACS instrument three far-infrared wavebands (70, 100 160 um). Here we combine ancillary photometry spanning optical to wavelengths order determine circumstellar disc. spectral energy distribution multi-wavelength emission simultaneously modelled using a radiative transfer codes. Herschel/PACS images reveals presence extended structure all images. From model derive 87.0 +/- 2.5 au, an inclination 70.7 2.2 degrees line sight position angle 30.1 0.5 degrees. Deconvolution reveal potential asymmetry but this remains uncertain as combined image analysis replicate both single axisymmetric annulus.
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