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Showing 1–3 of 3 results
Advanced filters: Author: Ken Kitaguchi Clear advanced filters

  • X-ray observations of the core of the Perseus cluster reveal a remarkably quiescent atmosphere in which the gas has a line-of-sight velocity dispersion of about 164 kilometres per second in the region 30–60 kiloparsecs from the central nucleus; turbulent pressure support in the gas is four per cent of the thermodynamic pressure, necessitating only a small correction to the total cluster mass determined from hydrostatic equilibrium.

    • Felix Aharonian
    • Hiroki Akamatsu
    • Abderahmen Zoghbi
    Research
    Nature
    Volume: 535, P: 117-121

  • High-resolution X-ray spectra show near-solar abundances of chromium, manganese and nickel with respect to iron in the Perseus cluster, suggesting that the progenitors of type Ia supernovae could be near- and sub-Chandrasekhar-mass white dwarfs.

    • Felix Aharonian
    • Hiroki Akamatsu
    • Abderahmen Zoghbi
    Research
    Nature
    Volume: 551, P: 478-480