11HUGS & LVL: Star Formation Properties of Local Volume Galaxies

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Scientific paper

11HUGS, the 11 Mpc H-alpha UV Galaxy Survey, is a GALEX Legacy program designed to systematically characterize the star formation demographics of the Local Volume using a complete sample of 258 spiral and irregular galaxies within 11 Mpc. The dataset consists of snapshots of the instantaneous massive star formation as captured via narrowband H-alpha imaging, as well as GALEX NUV (1500 Å) and FUV (2300 Å) imaging, which traces star formation over a longer 1e8 yr timescale. UV observations of the 11HUGS sample are now 80% complete, and we use the available data, along with the completed H-alpha component of the survey, to investigate the consistency between UV and H-alpha derived star formation rates over a full range of activities down to ultra-low SFRs of 0.0001 M_sun/yr. We also provide a first look at the span of UV-FIR SED and dust properties using initial data from the follow-on Cycle 4 Spitzer Local Volume Legacy (LVL) survey, which is obtaining mid and far-IR imaging for the full sample.

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