A broad iron line in the Chandra/HETG spectrum of 4U 1705-44

Details A broad iron line in the Chandra/HETG spectrum of 4U 1705-44 A broad iron line in the Chandra/HETG spectrum of 4U 1705-44

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.132..600d&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 132, p. 600-603.

Physics

Nuclear Physics

Scientific paper

We present preliminary results from a Chandra 30 ks observation of the atoll source 4U 1705-44. In particular we concentrate on the study of discrete features in the energy spectrum at energies below ~3 keV, as well as the iron Kα line, using the HEG spectrometer on board of the Chandra satellite. The iron Kα line at ~6.6 keV is found to be intrinsically broad (FWHM ~ 1.7 keV); its width can be explained by reflection from a cold accretion disk extending down to ~17 km from the neutron star center or by broadening in the hotter (~ 3-4 keV) Comptonizing corona.

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