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Mass Loss History of Evolved Stars (MLHES) Excavated by AKARI

Published online by Cambridge University Press:  30 December 2019

Toshiya Ueta ,
Andrew J. Torres ,
Hideyuki Izumiura  and
Issei Yamamura
Toshiya Ueta
Affiliation:
University of Denver, Denver, CO 80112, U.S.A. email: toshiya.ueta@du.edu (TU)
Andrew J. Torres
Affiliation:
University of Denver, Denver, CO 80112, U.S.A. email: toshiya.ueta@du.edu (TU)
Hideyuki Izumiura
Affiliation:
Okayama Branch Office, Subaru Telescope, NAOJ, Okayama, Japan
Issei Yamamura
Affiliation:
Institute of Space and Aeronautical Science, JAXA, Kanagawa, Japan
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Abstract

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We performed a far-IR imaging survey of the circumstellar dust shells of 144 evolved stars as a mission program of the AKARI infrared astronomical satellite. Our objectives were to characterize the far-IR surface brightness distributions of the cold dust component in the circumstellar dust shells. We found that (1) far-IR emission was detected from all but one object, (2) roughly 60–70 % of the target sources showed some extension, (3) 29 sources were newly resolved in the far-IR in the vicinity of the target sources, (4) the results of photometry measurements were reasonable with respect to the entries in the AKARI/FIS Bright Source Catalogue, and (5) an IR two-color diagram would place the target sources in a roughly linear distribution that may correlate with the age of the circumstellar dust shell.

Keywords

stars: AGB and post-AGBplanetary nebulae: generalcircumstellar matterstars: mass lossinfrared: starssurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 516 - 517
Copyright
© International Astronomical Union 2019 

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