Mass Loss History of the AGB star, R Cas
Toshiya Ueta (Univ. of Denver), Robert E. Stencel (Univ. of Denver),, Issei Yamamura (ISAS/JAXA), Hideyuki Izumiura (OAO/NAOJ), Yoshikazu Nakada, (Univ. of Tokyo), Mikako Matsuura (NAOJ), Yoshifusa Ita (ISAS/NAOJ),, Toshihiko Tanabe (Univ. of Tokyo)
TL;DR
This paper reports the discovery of a large, cold infrared shell around the AGB star R Cas, revealing its mass loss history and interaction with the interstellar medium through observations by AKARI and Spitzer.
Contribution
It presents the first detailed observation of an extended infrared shell around R Cas, providing new insights into AGB star mass loss and circumstellar environment.
Findings
Extended infrared shell spans nearly 3 arcmin
Shell shaped by interaction with interstellar medium
Supports models of mass loss history in AGB stars
Abstract
We report here on the discovery of an extended far-infrared shell around the AGB star, R Cassiopeia, made by AKARI and Spitzer. The extended, cold circumstellar shell of R Cas spans nearly 3 arcmin and is probably shaped by interaction with the interstellar medium. This report is one of several studies of well-resolved mass loss histories of AGB stars under AKARI and Spitzer observing programs labeled "Excavating Mass Loss History in Extended Dust Shells of Evolved Stars (MLHES)".
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astro and Planetary Science · Astrophysics and Star Formation Studies