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ISOPHOT observations of dust discs around main sequence stars

Published online by Cambridge University Press:  26 May 2016

H. J. Walker
H. J. Walker*
Affiliation:
Rutherford Appleton Laboratory, Chilton, Didcot 0X11 OQX, UK

Abstract

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The photometer (ISOPHOT) on the ESA Infrared Space Observatory (ISO) satellite was used to study the four Vega-like prototypes (Vega, β Pic, α PsA, ɛ Eri) and a set of candidate stars believed to have similar dust/debris discs. Most of the candidate stars were main sequence stars, but probably younger than Vega and ɛ Eri since they showed residual emission in the cores of their stellar spectral lines. Low resolution spectra were combined with long wavelength multi-filter photometry (between 60/μm and 200/μm) to give the spectral energy distributions for the dust/debris discs. Models suggested that the masses of the discs were between 10−7 and 10−4 M⊙ (2–2000 times the mass of the moon). These were more massive than the discs around the four prototypes, but less massive than the discs around young stars such as T Tau stars.

Type
Part IV: Protoplanetary and β Pic disks
Information
Symposium - International Astronomical Union , Volume 202: Planetary Systems in the Universe – Observation, Formation and Evolution , 2004 , pp. 387 - 389
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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