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| Paper: |
Extended Dust Shell of the Carbon Star U Hya Revealed by AKARI |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
627 |
| Authors: |
Ueta, T.; Izumiura, H.; Yamamura, I.; Matsunaga, N.; Ita, Y.; Matsuura, M.; Nakada, Y.; Fukushi, H.; Mito, H.; Tanabé, T.; Hashimoto, O. |
| Abstract: |
We have observed the carbon-rich AGB star U Hya in the far-infrared
(FIR) at 65, 90, 140, and 160 μm simultaneously, using the slow-scan
observing mode of the Far-Infrared Surveyor (FIS) aboard the Japanese
infrared astronomical satellite AKARI.
Our aim is to probe the mass-loss history of U Hya in the last
∼104 years by investigating the distribution of cold dust in
the extended circumstellar envelope using FIR maps at high spatial
resolution. The observed hollow shell and model calculations suggest
that the shell was formed as a direct consequence of a thermal pulse,
two-wind interactions, a termination shock, or some combination of these
processes. |
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