On the soft X-ray emission of M82

J. Liu, Q. D. Wang, S. Mao

    Research output: Contribution to journalArticlepeer-review


    We present a spatial analysis of the soft X-ray and Hα emissions from the outflow of the starburst galaxy M82. We find that the two emissions are tightly correlated on various scales. The O VII triplet of M82, as resolved by X-ray grating observations of XMM-Newton, is dominated by the forbidden line, inconsistent with the thermal prediction. The O VII triplet also shows some spatial variations. We discuss three possible explanations for the observed O VII triplet, including the charge exchange at interfaces between the hot outflow and neutral cool gas, a collisional non-equilibrium-ionization recombining plasma, and resonance scattering. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Original languageEnglish
    Pages (from-to)365-368
    Number of pages3
    JournalAstronomische Nachrichten
    Issue number4
    Publication statusPublished - Apr 2012


    • Atomic processes
    • Galaxies: individual (M82)
    • Galaxies: starburst
    • X-rays: galaxies


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