000002121 001__ 2121
000002121 005__ 20160701171659.0
000002121 0247_ $$2DOI$$a10.1088/0067-0049/216/1/10
000002121 037__ $$aASTROimport-278
000002121 100__ $$aBoyer, M. L.
000002121 245__ $$aAn Infrared Census of Dust in nearby Galaxies with Spitzer (DUSTiNGS). I. Overview
000002121 260__ $$c2015
000002121 520__ $$aNearby resolved dwarf galaxies provide excellent opportunities for studying the dust-producing late stages of stellar evolution over a wide range of metallicity (-2.7 ~ [Fe/H] ~ -1.0). Here, we describe DUSTiNGS (DUST in Nearby Galaxies with Spitzer): a 3.6 and 4.5 µm post-cryogen Spitzer Space Telescope imaging survey of 50 dwarf galaxies within 1.5 Mpc that is designed to identify dust-producing asymptotic giant branch (AGB) stars and massive stars. The survey includes 37 dwarf spheroidal, 8 dwarf irregular, and 5 transition-type galaxies. This near-complete sample allows for the building of statistics on these rare phases of stellar evolution over the full metallicity range. The photometry is >75% complete at the tip of the red giant branch for all targeted galaxies, with the exception of the crowded inner regions of IC 10, NGC 185, and NGC 147. This photometric depth ensures that the majority of the dust-producing stars, including the thermally pulsing AGB stars, are detected in each galaxy. The images map each galaxy to at least twice the half-light radius to ensure that the entire evolved star population is included and to facilitate the statistical subtraction of background and foreground contamination, which is severe at these wavelengths. In this overview, we describe the survey, the data products, and preliminary results. We show evidence for the presence of dust-producing AGB stars in eight of the targeted galaxies, with metallicities as low as [Fe/H] = -1.9, suggesting that dust production occurs even at low metallicity. 
000002121 700__ $$a McQuinn, K. B. W.
000002121 700__ $$a Barmby, P.
000002121 700__ $$a Bonanos, A. Z.
000002121 700__ $$a Gehrz, R. D.
000002121 700__ $$a Gordon, K. D.
000002121 700__ $$a Groenewegen, M. A. T.
000002121 700__ $$a Lagadec, E.
000002121 700__ $$a Lennon, D.
000002121 700__ $$a Marengo, M.
000002121 700__ $$a Meixner, M.
000002121 700__ $$a Skillman, E.
000002121 700__ $$a Sloan, G. C.
000002121 700__ $$a Sonneborn, G.
000002121 700__ $$a van Loon, J. T.
000002121 700__ $$a Zijlstra, A.
000002121 773__ $$c10$$i1$$pThe Astrophysical Journal Supplement Series$$v216$$y2015
000002121 85642 $$ahttp://esoads.eso.org/abs/2015ApJS..216...10B
000002121 905__ $$apublished in
000002121 980__ $$aREFERD