The neutron star watched is a piece of a high-mass X-ray parallel framework—the conservative, inconceivably thick neutron star matched with a huge ‘ordinary’ supergiant star. Neutron stars in parallel frameworks create X-rays when material from the binary star falls toward the neutron star and is quickened to high speeds. Because of this increasing speed, X-rays are delivered that can in turn connect with the materials of the stellar wind to create secondary X-rays of mark energies at different distances from the neutron star. Unbiased—uncharged—iron atoms, for instance, deliver fluorescence X-rays with energies of 6.4 kilo-electron volts (keV), about 3000 times the energy of visible light. Space experts use spectrometers, similar to the instrument on Chandra, to catch these X-rays and separate them dependent on their energy to find out about the structure of stars.
Pragati Pradhan, et al., “Multitude of iron lines including a Compton-scattered component in OAO 1657 – 415 detected with Chandra,” MNRAS, 2019; doi:10.1093/mnras/sty3441