Investigating the nature of absorption lines in the Chandra X-ray spectra of the neutron star binary 4U 1820-30

E. M. Cackett, J. M. Miller, J. Raymond +5

We use four Chandra gratings spectra of the neutron star low-mass X-ray binary 4U 1820-30 to better understand the nature of certain X-ray absorption lines in X-ray binaries, inclu…