Kavli Affiliate: Susan E. Clark
| First 5 Authors: The Pan-Experiment Galactic Science Group, :, Julian Borrill, Susan E. Clark, Jacques Delabrouille
| Summary:
Polarized foreground emission from the Galaxy is one of the biggest
challenges facing current and upcoming cosmic microwave background (CMB)
polarization experiments. We develop new models of polarized Galactic dust and
synchrotron emission at CMB frequencies that draw on the latest observational
constraints, that employ the “polarization fraction tensor” framework to
couple intensity and polarization in a physically motivated way, and that allow
for stochastic realizations of small-scale structure at sub-arcminute angular
scales currently unconstrained by full-sky data. We implement these models into
the publicly available Python Sky Model (PySM) software and additionally
provide PySM interfaces to select models of dust and CO emission from the
literature. We characterize the behavior of each model by quantitatively
comparing it to observational constraints in both maps and power spectra,
demonstrating an overall improvement over previous PySM models. Finally, we
synthesize models of the various Galactic foreground components into a coherent
suite of three plausible microwave skies that span a range of astrophysical
complexity allowed by current data.
| Search Query: ArXiv Query: search_query=au:”Susan E. Clark”&id_list=&start=0&max_results=3