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• W1989120784 abstract "We analyze the ASCA spectrum of the Cen X-3 X-ray binary system in eclipse using atomic models appropriate to recombination-dominated level population kinetics in an overionized plasma. In order to estimate the wind characteristics, we first fit the eclipse spectrum to a single-zone photoionized plasma model. We then fit spectra from a range of orbital phases using global models of photoionized winds from the companion star and the accretion disk that account for the continuous distribution of density and ionization state. We find that the spectrum can be reproduced by a density distribution of the form derived by Castor et al. (1975) for radiation-driven winds with /v∞ consistent with values for isolated stars of the same stellar type. This is surprising because the neutron star is very luminous (~1038 ergs s-1) and the X-rays from the neutron star should ionize the wind and destroy the ions that provide the opacity for the radiation-driven wind. Using the same functional form for the density profile, we also fit the spectrum to a spherically symmetric wind centered on the neutron star, a configuration chosen to represent a disk wind. We argue that the relatively modest orbital variation of the discrete spectrum rules out a disk wind hypothesis." @default.
• W1989120784 created "2016-06-24" @default.
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• W1989120784 date "2001-02-01" @default.
• W1989120784 modified "2023-09-24" @default.
• W1989120784 title "The X‐Ray Photoionized Wind in Cen X‐3/V779 Cen" @default.
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• W1989120784 doi "https://doi.org/10.1086/318425" @default.
• W1989120784 hasPublicationYear "2001" @default.
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