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.
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页码：453 / 458
页数：6
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