Discovery of absorption features in the X-ray spectrum of an isolated neutron star

摘要: We observed 1E 1207.4-5209, a neutron star in the center of supernova remnant PKS 1209-51/52, with ACIS detector aboard Chandra X-Ray Observatory and detected two absorption features source spectrum. The are centered near 0.7 1.4 keV; their equivalent widths about 0.1 keV. discuss various possible interpretations exclude some them. A likely interpretation is that associated atomic transitions once-ionized helium atmosphere strong magnetic field. first clear detection spectrum an isolated provides opportunity to measure mass-to-radius ratio constrain equation state superdense matter.