Ref: ASTROimport-864

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

Boyer, M. L. ; McQuinn, K. B. W. ; Barmby, P. ; Bonanos, A. Z. ; Gehrz, R. D. ; Gordon, K. D. ; Groenewegen, M. A. T. ; Lagadec, E. ; Lennon, D. ; Marengo, M. ; Meixner, M. ; Skillman, E. ; Sloan, G. C. ; Sonneborn, G. ; van Loon, J. T. ; Zijlstra, A. A.

published in Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time, 497, pp. 453 (2015)

Abstract: 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-µm 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.

Links: link

The record appears in these collections:
Royal Observatory of Belgium > Astronomy & Astrophysics
Science Articles > Non-refereed Articles

 Record created 2016-07-01, last modified 2016-07-01