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Showing 1–14 of 14 results
Advanced filters: Author: Simone Castellano Clear advanced filters

  • 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

  • José Martín-Subero and colleagues report the whole-genome bisulfite sequencing of ten blood cell subpopulations representing the cellular stages during B cell differentiation. They find that early stages are characterized by enhancer demethylation and that neoplasms derived from B cell lineages undergo methylation changes in regions with dynamic methylation during normal differentiation.

    • Marta Kulis
    • Angelika Merkel
    • José I Martín-Subero
    Research
    Nature Genetics
    Volume: 47, P: 746-756

  • Quantum cascade lasers are compact sources, but simultaneously achieving cw operation, low divergence and single-mode emission has proven difficult. Here, Biasco et al. use a combination of distributed feedback and outcoupling via hole arrays, improving the performance of such a terahertz laser.

    • Simone Biasco
    • Katia Garrasi
    • Miriam S. Vitiello
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8

  • José Martin-Subero and colleagues report whole-genome bisulfite sequencing and methylome analysis of two CLLs and three B-cell subpopulations using high-density microarrays on 139 CLLs. They identify widespread hypomethylation in the gene body that is largely associated with intragenic enhancer elements.

    • Marta Kulis
    • Simon Heath
    • José I Martín-Subero
    Research
    Nature Genetics
    Volume: 44, P: 1236-1242

  • Stéphanie Debette and colleagues report the results of a genome-wide association study of cervical artery dissection, a major cause of ischemic stroke in young adults. They show that common variation in PHACTR1, previously associated with lower risk of migraine and increased risk of myocardial infarction, is associated with reduced risk of cervical artery dissection.

    • Stéphanie Debette
    • Yoichiro Kamatani
    • Jean Dallongeville
    Research
    Nature Genetics
    Volume: 47, P: 78-83

  • Evidence of the functional roles of non-coding RNAs in cancer is expanding, and the potential of these RNAs as diagnostic and prognostic biomarkers is increasingly recognized. Herein, the authors review the recent developments in these areas and provide compendiums of circulating microRNAs and long non-coding RNAs that have promise as diagnostic and prognostic cancer biomarkers.

    • Simone Anfossi
    • Anna Babayan
    • George A. Calin
    Reviews
    Nature Reviews Clinical Oncology
    Volume: 15, P: 541-563