@inproceedings{oai:jaxa.repo.nii.ac.jp:00005024, author = {Cackett, M. Edward and Miller, J. M. and Ballantyne, D. R. and Barret, D. and Bhattacharyya, S. and Boutelier, M. and Miller, M. C. and Strohmayer, T. E. and Wijnands, R.}, book = {宇宙航空研究開発機構特別資料:, JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H}, month = {Feb}, note = {The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan, Over recent years, Suzaku and XMM-Newton observations of neutron star low-mass X-ray binaries have uncovered broad, asymmetric Fe K emission lines in these sources. It is believed that the lines arise from irradiation of the innermost accretion disk. Thus, the line profile is skewed by relativistic effects present there, leading to a measure of the inner disk radius. We summarize our comprehensive analysis of the spectra from 10 neutron star low-mass X-ray binaries here. We not only fit simple phenomenological models to the spectra, but also a more self-consistent approach using a reflection model wherein a blackbody provides the irradiating flux. Such a model is appropriate for these sources where a blackbody dominates the spectrum from around 8 - 20 keV. A realistic geometry for this reflection would involve the boundary layer (the assumed source of blackbody-like emission) irradiating the inner disk. From our modeling, we only find a small range in inner disk radius (6 - 15 GM/c(exp 2) in the majority of cases), and find no obvious trend with luminosity. One particularly interesting source is the accreting millisecond X-ray pulsar SAX J1808.4-3658. The Fe K emission line in this source allows us to estimate the magnetic field strength in this system to be approximately 3 x 10(exp 8) G, broadly consistent with previous independent estimates., Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science, 資料番号: AA0064574092, レポート番号: JAXA-SP-09-008E}, pages = {248--251}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {Fe K emission lines in neutron star low-mass X-ray binaries}, volume = {JAXA-SP-09-008E}, year = {2010} }