An H-alpha Imaging Survey of Galaxies in the Local 11 Mpc Volume

Understand

As part of a broader effort to characterize the population of star-forming galaxies in the local universe, we have carried out an H-alpha+[NII] imaging survey for an essentially volume-limited sample of galaxies within 11 Mpc of the Milky Way.

• This paper describes the design of the survey, the observation, data processing, and calibration procedures, and the characteristics of the galaxy sample.
• The main product of the paper is a catalog of integrated H-alpha fluxes, luminosities, and equivalent widths for the galaxies in the sample.
• We briefly discuss the completeness properties of the survey and compare the distribution of the sample and its star formation properties to other large H-alpha imaging surveys.