Figure 1 from The EMPIRE Survey: Systematic Variations in the Dense Gas Fraction and Star Formation Efficiency from Full-disk Mapping of M51 Frank Bigiel et al. 2016 ApJL 822 L26 doi:10.3847/2041-8205/822/2/L26 Information: Thank you for downloading this PowerPoint slide from The Astrophysical Journal Letters. This slide was designed to be edited; you can: - Remove components (including this text box!) - Resize components - Apply a style or theme - Please remember to include the original article citation information.