Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session C02: The establishment of a new field of research in X-ray astronomy with NASA's and the Italian Space Agency's successful Imaging X-Ray Polarimetry Explorer (IXPE) missionInvited
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Sponsoring Units: DAP Chair: Belinda Wilkes, University of Bristol Room: MG Salon A - 3rd Floor |
Saturday, April 15, 2023 1:30PM - 2:06PM |
C02.00001: A detailed description of the Imaging X-ray Polarimetry Explorer emphasizing its unique capabilities. Invited Speaker: Martin C Weisskopf The Imaging X-ray Polarimetry Explorer (IXPE) is a NASA small explorer in partnership with the Italian Space Agency (ASI). Launched in 2021 December, IXPE uses new technology---developed in Italy for measuring the degree of polarization and the position angle--- and advances of X-ray optics technology developed in the United States---to provide 1-arc minute scale imaging polarimetry in the energy range 2-8 keV. This presentation describes the IXPE observatory and baseline two-year mission. |
Saturday, April 15, 2023 2:06PM - 2:42PM |
C02.00002: Results of X-ray polarimetry with the Imaging X-ray Polarimetry Explorer (IXPE) of Galactic sources such as magnetars, pulsing neutron stars, and stellar mass black holes in binary system Invited Speaker: Michela Negro After nearly five decades from the flight of OSO-8 and the first detection of polarized X-rays from the Crab, we just entered the era of X-ray polarimetry, with the launch of the Imaging X-ray Polarimetry Explorer in December of 2021. Because of its sensitivity to the geometry of the sources and to magnetic field structures, X-ray polarimetry now allows us to study compact objects in a completely new way, and the first year of operation for IXPE has been full of exciting results for Galactic science. In my talk, I will present some of the first results on Galactic sources, from magnetars, to pulsar wind nebulae, to X-ray binaries. |
Saturday, April 15, 2023 2:42PM - 3:18PM |
C02.00003: Active galactic nuclei revealed by X-ray polarization measurements from the Imaging X-ray Polarimetry Explorer (IXPE) Invited Speaker: Manel Errando X-ray polarization probes the particle acceleration zone in relativistic jets as well as the geometry of the central region of active galactic nuclei. In its first year of operations, the Imaging X-ray Polarimetry Explorer (IXPE) has completed a first-time characterization of the X-ray polarization properties of a sample of active galactic nuclei. Highlights of these observations include the detection of significant X-ray polarization from the jets of three high-frequency-peaked BL Lac-type blazars (Mrk 501, Mrk 421, and 1ES 1959+650) that point to energy-stratified shocks as the most plausible sites for electron acceleration in jets. The lack of measurable polarization from low-frequency-peaked blazars, on the other hand, constrains the potential contribution from proton synchrotron radiation to the observed X-ray emission. Observations of the radio and Seyfert galaxies have provided constraints on the jet magnetic field and the torus geometry of the central region of active galactic nuclei. This talk will review the IXPE extragalactic program, discussing results from observations of active galactic nuclei and the gamma-ray burst GRB 221009A from which X-ray polarization constraints on the prompt and afterglow emission were derived. |
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