Extended Dust Shell of the Carbon Star U Hya Revealed by AKARI

Details Extended Dust Shell of the Carbon Star U Hya Revealed by AKARI Extended Dust Shell of the Carbon Star U Hya Revealed by AKARI

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..445..627u&link_type=abstract

Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants. Proceedings of a conference held at University Ca

Astronomy and Astrophysics

Astronomy

Scientific paper

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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