Study of the Iron Line and Low Energy Features in 4u 1728-34 with Chandra/hetgs

Details Study of the Iron Line and Low Energy Features in 4u 1728-34 with Chandra/hetgs Study of the Iron Line and Low Energy Features in 4u 1728-34 with Chandra/hetgs

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..824d&link_type=abstract

Chandra Proposal ID #03400860

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Chandra Proposal Id #03400860

Scientific paper

We propose a 30 ks Chandra/HETGS observation of 4U 1728-34 to perform a detailed study of the iron Kalpha line and other low energy features. This source shows a broad (1 keV FWHM) iron Kalpha line: several hypotheses can be proposed to explain the width (e.g. relativistic and Doppler effects in an accretion disk, Compton scattering, line-blending), and we expect that the high energy resolution of Chandra HETGS will be able to resolve the complex line shape and to constrain the various models proposed. These kind of sources are also expected to be rich sources of discrete features at low energy (0.3-3 keV), because of the presence of a photoionized corona (ADC). These low energy features are an important diagnostic tool for the physical conditions of the emitting regions.

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