Galaxies and clusters articles within Nature Communications

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  • Article
    | Open Access

    The current understanding of the origin and properties of cluster magnetic fields is limited by observational challenges. Here, the authors show that magnetic field orientations of galaxy clusters, including radio relic and radio halos, can be derived via combination of synchrotron intensity gradient technique with radio observations.

    • Yue Hu
    • , C. Stuardi
    •  & Ka Wai Ho

  • Article
    | Open Access

    The origin of the diffuse gamma-ray background (DGRB) is unknown. Here, the authors show that the integrated gamma-ray flux from clusters can contribute up to 100% of the DGRB flux observed by Fermi-LAT above 100 GeV.

    • Saqib Hussain
    • , Rafael Alves Batista
    •  & Klaus Dolag

  • Article
    | Open Access

    The origins of the pair of X-ray bubbles, called eROSITA bubbles (eRBs), detected in the halo of Milky Way are debated. Here, the authors show hydrodynamical simulations suggesting circumgalactic medium wind model can explain asymmetric eRBs.

    • Guobin Mou
    • , Dongze Sun
    •  & Zhicheng He

  • Article
    | Open Access

    High redshift blazars are efficient probes of supermassive black holes and their environment in the early Universe. Here the authors show measurements of polarised emission and proper motion in the blazar J0906+6930 (redshift of 5.47) characterised by a nascent jet embedded in and interacting with a dense medium.

    • Tao An
    • , Prashanth Mohan
    •  & Zhenya Zheng

  • Article
    | Open Access

    Galaxy clusters contain vast amount of dark matter and baryonic matter. Here the authors show the observational detection of the anti-correlation of gas mass and stellar mass observables in the most massive galaxy clusters, indicating such clusters retain close to the cosmic mix of baryons and dark matter.

    • Arya Farahi
    • , Sarah L. Mulroy
    •  & Nobuhiro Okabe

  • Article
    | Open Access

    Pulsar timing arrays enable the search for the isotropic gravitational-wave (GW) background originating from super massive black hole binary populations, but impose a stringent upper limit on the GW characteristic amplitude. Here, the authors use Bayesian hierarchical modelling applied to a range of astrophysical scenarios to revisit the implications of this upper limit.

    • Hannah Middleton
    • , Siyuan Chen
    •  & Alberto Vecchio

  • Article
    | Open Access

    Winged radio galaxies possess wing features detectable at radio wavelengths, yet the physical interpretation of such extragalactic radio sources remains elusive. Here, the authors report the observation of a downsized Z-shaped radio emission from the Galactic microquasar GRS 1758-258, shedding light on the formation of wings in radio galaxies given its strongly  reminiscent winged morphology.

    • Josep Martí
    • , Pedro L. Luque-Escamilla
    •  & Josep M. Paredes

  • Article
    | Open Access

    Extremely metal-poor galaxies in the local universe are the best analogues to investigating the interstellar medium at a quasi-primitive environment in the early universe. Here, the authors detect CO emission in a galaxy at 7% solar metallicity, offering direct evidence for the presence of molecular gas.

    • Yong Shi
    • , Junzhi Wang
    •  & Qiusheng Gu

  • Article
    | Open Access

    Counter-rotating gases demonstrate external gas acquisition in galaxies, but their presence in blue, star-forming galaxies has not been studied systematically. Here, the authors analyse the MaNGA survey data to find a fraction of counter-rotators among blue galaxies whose central regions show ongoing growth.

    • Yan-Mei Chen
    • , Yong Shi
    •  & Ren-Bin Yan

  • Article
    | Open Access

    The luminosity of ultraviolet light emitted by the first galaxies in the universe traces the formation and evolution of stars and galaxies which led to the epoch of reionization. Here the authors use data from the Hubble Space Telescope and through a model provide a bound for the total luminosity.

    • Ketron Mitchell-Wynne
    • , Asantha Cooray
    •  & Joseph Smidt

  • Article
    | Open Access

    The cold dark matter paradigm predicts that Milky Way-like galaxies should have dwarf galaxies with dark matter halos as satellites. Ural et al.present a new model, independent of cosmological simulations, that constrains the pre-infall mass of the Milky Way satellite Carina to a value lower than expected.

    • Uğur Ural
    • , Mark I. Wilkinson
    •  & Matthew G. Walker

  • Article |

    Recent observations have uncovered a cloud of ionized gas falling into the supermassive black hole at the centre of our galaxy. Murray-Clay and Loeb present a model that may explain these observations, in which the cloud is produced from the proto-planetary disc around a low-mass star orbiting the black hole.

    • Ruth A. Murray-Clay
    •  & Abraham Loeb

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