DUST in Nearby Galaxies with Spitzer (DUSTINGS): An Infrared Census of Extreme AGB Stars in Nearby Dwarf Galaxies

被引：0

作者：

Boyer, Martha L. ^{[1
]}

McQuinn, K. B. W. ^{[2
]}

Barmby, P. ^{[3
]}

Bonanos, A. Z. ^{[4
]}

Gehrz, R. D. ^{[2
]}

Gordon, K. D. ^{[5
]}

Groenewegen, M. A. T. ^{[6
]}

Lagadec, E. ^{[7
]}

Lennon, D. ^{[8
]}

Marengo, M. ^{[9
]}

Meixner, M. ^{[5
]}

Skillman, E. ^{[2
]}

Sloan, G. C. ^{[10
]}

Sonneborn, G. ^{[1
]}

van Loon, J. Th ^{[11
]}

Zijlstra, A. A. ^{[12
]}

机构：

[1] NASA, Observat Cosmol Lab, Goddard Space Flight Ctr, Greenbelt, MD USA

[2] Univ Minnesota, Minnesota Inst Astrophys, Minneapolis, MN USA

[3] Univ Western Ontario, Dept Phys & Astron, London, ON, Canada

[4] Natl Observ Athens, IAASARS, Athens, Greece

[5] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[6] Royal Observ Belgium, Uccle, Belgium

[7] Univ Nice Sophia Antipolis, Observ Cote Azur, F-06189 Nice, France

[8] ESA European Space Astron Ctr, Madrid, Spain

[9] Iowa State Univ, Dept Phys & Astron, Ames, IA USA

[10] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[11] Keele Univ, Astrophys Grp, Keele, Staffs, England

[12] Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England

来源：

WHY GALAXIES CARE ABOUT AGB STARS III: A CLOSER LOOK IN SPACE AND TIME | 2015年 / 497卷

关键词：

ASYMPTOTIC GIANT BRANCH; LARGE-MAGELLANIC-CLOUD; LOCAL GROUP DWARFS; MASS-LOSS RETURN; EVOLVED STARS; LOW METALLICITY; IRAC CENSUS; SAGE SURVEY; MU-M; EVOLUTION;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Nearby resolved dwarf galaxies provide excellent opportunities for studying the dust-producing late stages of stellar evolution. DUSTiNGS (DUST in Nearby Galaxies with Spitzer) is a 3.6- and 4.5-mu m imaging survey of 50 dwarf galaxies within 1.5 Mpc. We obtained observations in two epochs, separated by approximately 6 months, to assist in identifying long-period thermally-pulsing (TP-)AGB stars. We find more than 500 dusty variable TP-AGB stars (sometimes called extreme AGB stars). The majority of these stars are new discoveries, including 12 with [Fe/H] < -2 dex. These stars are likely in the superwind phase and thus dominate the current AGB dust input to the interstellar medium of their respective galaxies.

引用

页码：453 / 458

页数：6

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