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Jonathan P. Marshall |
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"AKARI Observations of
Debris Discs in the Far Infra-red" |
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AKARI is an infra-red survey satellite, observing the entire sky from 2 -- 180 microns in nine wavebands with better sensitivity, superior resolution and over a broader spectral range than the previous IRAS survey of 25 years ago. One of the major results of the IRAS survey was the detection of circumstellar dust discs as a sign of planet formation through excess infra-red emission, particularly at 60 microns. The Far Infra-red Surveyor (FIS) on AKARI, covering four wavebands between 65 and 160 microns, is particularly well suited to extending the observed spectral energy distributions (SED) of both IRAS (and Spitzer) debris discs to longer wavelengths, helping to discriminate between different disc models by constraining the disc SED at far infra-red wavelengths where previously only upper limits were available. In this talk I will give an overview of the AKARI mission and debris disc observation followed by some of the results from the work I am doing on AKARI observations of young debris discs as part of my PhD. |