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X-ray spectra of X Persei (1979)

Robinson-Saba, J. ; Serlemitsos, P. J. ; Swank, J. H. ; [et al.]

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Publication Date: 2011-08-17

Description: The GSFC cosmic X-ray spectroscopy experiment on OSO 8 observed X Per for 20 days during two observations in 1976 February and 1977 February. The spectrum of X Per varies in phase with its 13.9 minute period, hardening significantly at X-ray minimum. Unlike other X-ray binary pulsar spectra, those of X Per do not exhibit iron line emission or strong absorption features. Our data show no evidence for a 22 hour periodicity in the X-ray intensity of X Per. These results indicate that the X-ray emission from X Per may be originating from a neutron star in a low-density region far from the optically identified Be star.

Keywords: ASTRONOMY

Type: Astrophysical Journal; vol. 227

Format: text

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