High Energy Astrophysics and Cosmology in the era of all-sky surveys

Session

X-ray polarimetry

19 Jun 2026, 09:00

28. New insights on cosmic sources from X-ray polarimetry

Giorgio Matt (Roma Tre University)

19/06/2026, 09:00

The launch of the Imaging X-ray Polarimetry Explorer (IXPE) on December 2021 (re)opened the window of X-ray polarimetry. In its first 4.5 years of operation IXPE observed objects belonging to almost all classes of X-ray sources, with a wealth of interesting and often surprising results. In this talk I will provide a (inevitably biased) review of IXPE results, and briefly discuss possible...

51. The IXPE View of NS-LMXBs: New Insights from X-ray Polarimetry into Emission Geometry and Accretion Physics

Alessandro Di Marco (INAF - IAPS)

19/06/2026, 09:30

X-ray timing and broadband spectroscopy have been the main methods for studying the rich and complex phenomenology of neutron stars with weak magnetic fields for a long time. Nowadays, X-ray polarimetry offers the missing, independent set of observables that are directly relevant to comprehending the geometry and nature of the emission regions: polarization degree and angle. This allows for...

9. IXPE observations of black hole binaries: new constraints on accretion geometry

Alexandra Veledina (University of Turku)

19/06/2026, 10:00

The advent of X-ray polarimetry has opened a new observational window into the accretion physics of compact objects. Observations with the Imaging X-ray Polarimetry Explorer (IXPE) provide unique constraints on the geometry and physical conditions of emission regions in black hole X-ray binaries. However, the first polarimetric results have raised new challenges for existing accretion models....

4. X-ray polarisation of accreting pulsars: current results and future prospects

Dr Sergey Tsygankov (University of Turku)

19/06/2026, 11:00

X-ray polarimetry has recently opened a new observational window on accreting neutron stars, enabling direct measurements of the polarization properties of radiation formed in ultra-strong magnetic fields. The first systematic observations of X-ray pulsars with IXPE have provided phase-resolved measurements of polarization degree and angle, allowing direct constraints on the geometric...

38. X-ray spectropolarimetric insights into the inner regions of accretion flows

Andrzej Niedzwiecki (University of Lodz)

19/06/2026, 11:30

I will discuss the current paradigm for the innermost regions of black hole accretion flows in light of constraints from X-ray spectroscopy. The main spectral components observed in luminous accretion states will be outlined, highlighting how their modeling has led to a broad picture of the radiative and dynamical processes operating in the vicinity of the black hole horizon. Despite this...