Little Things
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Author
Hunter, D. A.
Ficut-Vicas, D.
Ashley, T.
Brinks, E.
Cigan, P.
Elmegreen, B. G.
Heesen, V.
Herrmann, K. A.
Johnson, M.
Oh, S.H.
Rupen, M. P.
Schruba, A.
Simpson, C.E.
Walter, F.
Westpfahl, D. J.
Young, L. M.
Zhang, H.-X.
Attention
2299/13045
Abstract
We present LITTLE THINGS (Local Irregulars That Trace Luminosity Extremes, The H I Nearby Galaxy Survey), which is aimed at determining what drives star formation in dwarf galaxies. This is a multi-wavelength survey of 37 dwarf irregular and 4 blue compact dwarf galaxies that is centered around H I-line data obtained with the National Radio Astronomy Observatory (NRAO) Very Large Array (VLA). The H I-line data are characterized by high sensitivity (≤1.1 mJy beam–1 per channel), high spectral resolution (≤2.6 km s–1), and high angular resolution (~6''). The LITTLE THINGS sample contains dwarf galaxies that are relatively nearby (≤10.3 Mpc; 6'' is ≤300 pc), that were known to contain atomic hydrogen, the fuel for star formation, and that cover a large range in dwarf galactic properties. We describe our VLA data acquisition, calibration, and mapping procedures, as well as H I map characteristics, and show channel maps, moment maps, velocity-flux profiles, and surface gas density profiles. In addition to the H I data we have GALEX UV and ground-based UBV and Hα images for most of the galaxies, and JHK images for some. Spitzer mid-IR images are available for many of the galaxies as well. These data sets are available online
Publication date
2012-11Published in
The Astronomical JournalPublished version
https://doi.org/10.1088/0004-6256/144/5/134Other links
http://hdl.handle.net/2299/13045Metadata
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