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Showing 1–12 of 12 results
Advanced filters: Author: Ronaldo Bellazzini Clear advanced filters

  • PolarLight is the first dedicated soft X-ray polarimeter in space since the 1970s and is attempting to reopen this long-awaited window in astronomy, explain Principal Investigator Hua Feng and Ronaldo Bellazzini.

    • Hua Feng
    • Ronaldo Bellazzini
    Comments & Opinion
    Nature Astronomy
    Volume: 4, P: 547

  • The accretion geometry of X-ray binary Cygnus X-3 is determined here from IXPE observations. X-ray polarization reveals a narrow funnel with reflecting walls, which focuses emission, making Cyg X-3 appear as an ultraluminous X-ray source.

    • Alexandra Veledina
    • Fabio Muleri
    • Silvia Zane
    Research
    Nature Astronomy
    Volume: 8, P: 1031-1046

  • A study reports the measurement of the polarization degree and angle of X-rays from Sagittarius A* reflected off a nearby cloud, indicating an X-ray flare about 200 years ago.

    • Frédéric Marin
    • Eugene Churazov
    • Silvia Zane
    Research
    Nature
    Volume: 619, P: 41-45

  • X-ray polarization measurements of the Crab nebula and pulsar by the IXPE satellite reveal a global toroidal magnetic field with large variations in local polarization, suggesting a more complex turbulence distribution than anticipated.

    • Niccolò Bucciantini
    • Riccardo Ferrazzoli
    • Silvia Zane
    Research
    Nature Astronomy
    Volume: 7, P: 602-610

  • X-ray polarimetry observations with the Imaging X-ray Polarimetry Explorer constrain the accretion geometry in an X-ray pulsar and provide evidence for a misalignment of the spin, magnetic and orbital axes in Her X-1.

    • Victor Doroshenko
    • Juri Poutanen
    • Fei Xie
    Research
    Nature Astronomy
    Volume: 6, P: 1433-1443

  • Polarization can exceed 60% at the leading edge of the inner part of the Vela pulsar wind nebula; in contrast with the case of the supernova remnant, the electrons in the pulsar wind nebula are accelerated with little or no turbulence in a highly uniform magnetic field.

    • Fei Xie
    • Alessandro Di Marco
    • Silvia Zane
    Research
    Nature
    Volume: 612, P: 658-660

  • Polarization measurements are reported for the blazar Mk501, revealing a degree of X-ray polarization that is more than twice the optical value and supporting the shock-accelerated energy-stratified electron population scenario.

    • Ioannis Liodakis
    • Alan P. Marscher
    • Silvia Zane
    ResearchOpen Access
    Nature
    Volume: 611, P: 677-681

  • In June 2022, the IXPE satellite observed a shock passing through the jet of active galaxy Markarian 421. The rotation of the X-ray-polarized radiation over a 5-day period revealed that the jet contains a helical magnetic field.

    • Laura Di Gesu
    • Herman L. Marshall
    • Silvia Zane
    Research
    Nature Astronomy
    Volume: 7, P: 1245-1258

  • A soft X-ray polarimetry capability has been missing from astronomy since the late 1970s. Here a CubeSat polarimeter named PolarLight has detected the Crab nebula and pulsar in the soft X-ray band, measuring their polarized emission. PolarLight observed a pulsar glitch, with an associated polarization change.

    • Hua Feng
    • Hong Li
    • Michele Pinchera
    Research
    Nature Astronomy
    Volume: 4, P: 511-516