XMM-Newton X-ray image of the star 70 Ophiuchi (left) and the X-ray emission from the region ("Annulus") surrounding the star represented in a spectrum over the energy of the X-ray photons (right). (IMAGE)
Caption
XMM-Newton X-ray image of the star 70 Ophiuchi (left) and the X-ray emission from the region ("Annulus") surrounding the star represented in a spectrum over the energy of the X-ray photons (right). Most of the emission consists of X-ray photons from the star itself but scattered within the observing telescope and across the camera (approximated by the model shown with the blue line), but there is a significant contribution around the oxygen K-alpha line at an energy of 0.56 keV that originates from the extended astrosphere rather than from the star (this contribution is included in the red model)
Credit
Kislyakova et al. Nature Astronomy, 10.1038/s41550-024-02222-x, 2024
Usage Restrictions
Credit must be given to the creator.
License
CC BY