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2010•Astronomy and AstrophysicsOpen access

Extended dust shell of the carbon star U Hydrae observed with AKARI

Hideyuki Izumiura, Toshiya Ueta, I. Yamamura, Noriyuki Matsunaga, Yoshifusa Ita, M. Matsuura, Y. Nakada, H. Fukushi, Hiroyuki Mito, Toshihiko Tanabé, Osamu Hashimoto

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Abstract

Context. Low- to intermediate-mass stars lose a significant fraction of their mass while they are on the asymptotic giant branch (AGB). This mass loss is considered to determine the final stages of their evolution. The material ejected from the stellar photosphere forms a circumstellar envelope in its surroundings. Layers of circumstellar envelope constitute the footprint of mass-loss history.

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Context. Low- to intermediate-mass stars lose a significant fraction of their mass while they are on the asymptotic giant branch (AGB). This mass loss is considered to determine the final stages of their evolution. The material ejected from the stellar photosphere forms a circumstellar envelope in its surroundings. Layers of circumstellar envelope constitute the footprint of mass-loss history.

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Available abstract

Context. Low- to intermediate-mass stars lose a significant fraction of their mass while they are on the asymptotic giant branch (AGB). This mass loss is considered to determine the final stages of their evolution. The material ejected from the stellar photosphere forms a circumstellar envelope in its surroundings. Layers of circumstellar envelope constitute the footprint of mass-loss history.

Key concepts: Physics, Asymptotic giant branch, Astrophysics, Circumstellar envelope, Carbon star, Photosphere, Astronomy, Circumstellar dust

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