The VANDELS survey: a measurement of the average Lyman-continuum escape fraction of star-forming galaxies at z=3.5

We present a study designed to measure the average LyC escape fraction (\langle f_{\rm esc}\rangle) of star-forming galaxies at z=3.5. We assemble a sample of 148 galaxies from the VANDELS survey at 3.35\leq z_{\rm spec}\leq3.95, selected to minimize line-of-sight contamination of their photometry. For this sample, we use ultra-deep, ground-based,... Show more