Conveners
Polarization and neutron stars and pulsars
- Cristina Baglio (New York University of Abu Dhabi)
Polarization and neutron stars and pulsars
- Cristina Baglio (New York University of Abu Dhabi)
Polarization and neutron stars and pulsars
- Cristina Baglio (New York University of Abu Dhabi)
Over the recent years the scientific interest around Xray polarimetry has blossomed, thanks to the advent of the first instruments conceived to perform systematically these measurements in celestial sources.
The Imaging X-ray Polarimetry Explorer (IXPE, NASA), launched in December 2021, is opening a new window in Astronomy, adding for the first time polarimetry to the array of techniques to...
The radio signal of pulsar PSR B1451-68 contains two polarization modes
of comparable strength, which are observed as two flux patches that rotate
meridionally on the Poincare sphere. Whenever they pass through the Stokes V poles, a transition between the orthogonal polarization modes (OPMs) is observed on a polarisation angle diagram. The circular polarization can be interpreted as a...
The Imaging X-ray Polarimetry Explorer is a joint NASA-ASI Small Explorer mission launched on December 9th 2021 and dedicated to angular-, time- and energy-resolved X-ray polarimetry in the 2-8 keV energy range. The observatory features three identical telescopes, with grazing-incidence mirrors built at NASA-MSFC and focal plane polarimeters based on the Gas Pixel Detector design provided by...
Neutron stars are the strongest magnetised stellar objects in the Universe. Therefore, it is natural to assume that their radiation, either from the magnetosphere or the surface, is strongly polarised. In this review I will summarise the multi-wavelength polarisation properties of isolated neutron stars, mainly rotation-powered pulsars, both time averaged and time resolved and outline...
The X/$\gamma$ ray polarization properties of the Crab pulsar and nebula are widely recognized as a unique probe into their emission models. Several missions have shown evidence of polarized emission from the Crab but all have been limited in statistics. Dedicated instruments and new measurements are therefore required.
POLAR was a wide field of view Compton-scattering polarimeter (50-500...
For the past half-century, pulsars have been used to push the boundaries of our understanding of the Universe, yet our understanding of pulsar radio emission is still limited by many unanswered questions. Polarimetry provides important information about pulsar emission geometry and magnetic field processes, but the pulsar population exhibits considerable variety in its polarimetric behaviour...
AR Sco is a binary system that contains both a white and red dwarf. Optical emission from this system is observed to be highly linearly polarised. The spin rate of the white dwarf has been observed to slow down with time, analogous to rotation-powered radio pulsars; it has thus been dubbed a "white dwarf pulsar", also given the lack of evidence for accretion activity in the system. We...
We report on new X-ray spectropolarimetric observations from the recently launched Imaging X-ray Polarimetry Explorer (IXPE) of the ultracompact low-mass X-ray binary system 4U 1626-67. We also report on supplementary observations taken by NICER and Chandra/HETGS around the IXPE observation window. We will present time-resolved spectropolarimetric 2-8 keV IXPE observations of 4U 1626-67 and...
