Accretion Disk Lines and Continuum in 4u 1820-30

Details Accretion Disk Lines and Continuum in 4u 1820-30 Accretion Disk Lines and Continuum in 4u 1820-30

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..461m&link_type=abstract

Chandra Proposal ID #02400090

Computer Science

Chandra Proposal Id #02400090

Scientific paper

We propose to use the ACIS-HETG to study the spectral evolution of 4U 1820-30. We seek to accurately measure the 6.4 keV Fe line and look for narrow line components superimposed that may likely arise from re-processing on the companion (white dwarf) star. We can measure the equivalent width and the velocities as a function of accretion rate and orbital phase to constrain the orgin of the emission. Also, by measuring changes in line EW and width between a low vs. high state, we can test Comptonization models for an accretion disk corona at differing optical depths.

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