The GALEX/S4G UV-IR color-color diagram: Catching spiral galaxies away from the Blue Sequence

Alexandre Y. K. Bouquin, Armando Gil de Paz, Samuel Boissier +8

We obtained GALEX FUV, NUV, and Spitzer/IRAC 3.6$\mu$m photometry for > 2000 galaxies, available for 90% of the S4G sample. We find a very tight "GALEX Blue Sequence (GBS)" in the (F…