Oral Presentation

CSFD: An Accurate, All-Purpose, Full-Sky Dust Map

Author(s): Yi-Kuan Chiang

Presenter: Yi-Kuan Chiang (ASIAA)

The widely used Galactic dust reddening map, the Schlegel, Finkbeiner, & Davis (1998, SFD) map, was found to be contaminated by the cosmic infrared background (CIB). Such a systematic can impact precision cosmology using galaxy clustering, lensing, and supernovae Ia (Chiang & Ménard 2019). In this talk, I will provide a solution by introducing a new, full-sky Galactic dust map dubbed CSFD, the corrected SFD. CSFD carries all Galactic features in the original SFD but with the CIB contamination removed via a data-intensive, clustering-based method. The new map enables more accurate extinction correction for the galaxy survey community. Meanwhile, it provides a better foreground template for the next generation of CMB and intensity mapping experiments.