The X ray dip source 4U 1624-49

Details The X ray dip source 4U 1624-49 The X ray dip source 4U 1624-49

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..439j&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 1: X Ray Binaries p 439-444 (SEE N90-25711 19-89)

Astronomy and Astrophysics

Astronomy

6

Light Curve, Spectrum Analysis, Stellar Luminosity, Stellar Spectra, Variability, X Ray Absorption, X Ray Sources, Metallicity, Stellar Flares, Time Measurement

Scientific paper

The results from EXOSAT and Ginga observations of the 21 hour period dip source 4U 1624-49 are presented. Two aspects of the time variability are considered. The behavior of the fractal dimension of the dip light curves as a function of dip activity are studied. The spectral characteristics of the source outside and during dip events are discussed. The non-dip state shows intermittent flaring activity which is modeled. The spectral analysis of the dips is complicated by the column density of the absorbing clouds. The implications of this effect are discussed, and it is found that the metallicity of the absorbing materials is 0.9 + or - 0.4 of the normal cosmic value.

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