Left: False-color image of the supernova remnant HESS J1731’347 . In the center is the neutron star, which emits X-rays and could therefore be observed by the XMM-Newton X-ray telescope. In the middle of the dust envelope is the companion star observed by the Gaia telescope. All kinds of invisible light were measured, from infrared (orange; Spitzer telescope) to X-rays (green, XMM-Newton telescope) and the ultrahigh-energy TeV band (blue; H.E.S.S. telescopes). Right: High-resolution X-ray spectra of the neutron star from measurements by the XMM-Newton and Suzaku telescopes, which were used to determine the stellar mass.
Left: False-color image of the supernova remnant HESS J1731'347 . In the center is the neutron star, which emits X-rays and could therefore be observed by the XMM-Newton X-ray telescope. In the middle of the dust envelope is the companion star observed by the Gaia telescope. All kinds of invisible light were measured, from infrared (orange; Spitzer telescope) to X-rays (green, XMM-Newton telescope) and the ultrahigh-energy TeV band (blue; H.E.S.S. telescopes). Right: High-resolution X-ray spectra of the neutron star from measurements by the XMM-Newton and Suzaku telescopes, which were used to determine the stellar mass. The lightest neutron star so far found is located at the center of the supernova remnant HESS J1731'347 .
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