Merged image of the XMM-Newton EPIC observations of W49B. Red: 2.35–2.7 keV (S Heα and Lyα); green: 4.4–6.2 keV (continuum); blue: 6.45–6.9 keV (Fe K complex). The white solid circle indicates the region for global spectra extraction and the cyan dashed annulus indicates the region for background spectra extraction. Credit: Lei Sun and Yang Chen, 2020.
Chinese astronomers using ESA’s XMM-Newton spacecraft have investigated a luminous supernova remnant (SNR) known as W49B. Results of the new study, presented in a paper published March 16 on arXiv.org, shed more light on the properties of this SNR and on the nature of its progenitor.
SNRs are diffuse, expanding structures resulting from a supernova explosion. They contain ejected material expanding from the explosion and other interstellar material that has been swept up by the passage of the shockwave from the…
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