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Extended dust shells around carbon stars resolved by “HIRAS” |
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| Authors: | H Izumiura D J M Kester T De Jong C Loup L B F M Waters Tj R Bontekoe |
| Institution: | (1) SRON Laboratory for Space Research Groningen Landleven 12, 9700 AV Groningen, P.O.Box 800, The Netherlands;(2) Institut d'Astrophysique de Paris, France;(3) Astronomical Institute Anton Pannekoek, University of Amsterdam, The Netherlands;(4) Bontekoe Data Consultancy, J.Bergmanstraat 3, 2221 BM Katwijk, The Netherlands;(5) Dept. of Astronomy and Earth Sciences, Tokyo Gakugei University, Japan |
| Abstract: | We have examined forty-two carbon stars which show excess emission at 60 and/or 100µm by applying maximum-entropy image reconstruction techniques to the IRAS 60µm survey data. Thirteen stars are found to be extended in the reconstructed images. Four of them show a detached ring centered on the stellar position. In particular, U Ant may have a double detached dust shell. The implications of our results are discussed concerning the variation of mass loss on the AGB evolution. |
| Keywords: | HIRAS carbon stars dust shells thermal pulses |
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