Place and dates

  • November 2 - 4th, 2020
  • University of Strasbourg, France


Among all the observational techniques used in astronomy, polarimetry has been fundamental to determine the nature, geometry and physical mechanisms of Active Galactic Nuclei (AGN). Polarimetry, either using broadband filters, spectroscopy, timing information, or imaging capabilities, has made history by unveiling the importance of the nucleus inclination in the vast zoology of quasi-stellar objects. Polarimetry revealed the physical origin of the featureless continuum, constrained the magnetic field intensity and topology in jets, detected strong and asymmetrical outflows from the inner AGN region, exposed the alignment of quasar polarization with large-scale structures and continues providing new information on the morphology and chemistry of extra-galactic dust. However, despite these great advances, the panchromatic polarization of AGN is far from being understood. The principal reason is the fact that radio measurements are restricted to narrow bands, infrared polarimeters are scarce, and high energy data (far ultraviolet, X- and gamma-rays) are simply missing.

The upcoming era of gigantic radio arrays (SKA, HERA, ngVLA), millimeter dishes (ALMA, EHT, AtLAST), large-class ground-based and space born telescopes (JWST, LSST, ELT, SPICA) and high energy polarimeters in space (IXPE, eXTP, LUVOIR/POLLUX) indicates that this is the perfect time to meet and gather all the recent AGN polarization discoveries. This conference is meant to summarize our current understanding of the panchromatic polarization signatures in AGN from observations and modeling, determine the best strategy to fill our knowledge gaps, learn about the new generation of instruments that could be beneficial to the field and make a strong case for the inclusion of polarimeters in any new observatory.

Invited speakers

Damien Hutsémekers (University of Liege)
Svetlana Jorstad (Boston University)
Makoto Kishimoto (Kyoto Sangyo University)
Ivan Marti-Vidal (University of Valencia)
Giorgio Matt (University of Roma III)
Coralie Neiner (LESIA laboratory, Paris-Meudon Observatory)


General informations

This three-days conference will be held at the University of Strasbourg, France, from Monday the 2nd (morning) to Wednesday the 4th (afternoon), in November 2020. An invited speaker will give a review talk at the beginning of each half-a-day session, followed by shorter contributed talks. Posters are welcomed. The theme of each session will be given after receiving all the presentation proposals.

We strongly encourage talks on current and forthcoming telescopes and satellites that will provide polarimetric data. Talks on the polarization from AGN-related physics and objects (particle production in jets, non-active galactic nuclei and smaller-scale black holes) are also greeted. Social events around Alsatian cuisine and wine are planned.

This conference is funded thanks to the French National Programs for astrophysics, in particular by the Programme National Cosmology et Galaxies (PNCG) and the Programme National des Hautes Energies (PNHE) of CNRS/INSU with INP and IN2P3, co-funded by CEA and CNES