Publications (9)
Silicon X-ray absorption in the Galactic ISM: the gaseous component
E. Gatuzz, T. W. Gorczyca, M. F. Hasoglu +3
We present a detailed analysis of the gaseous component of the Si K edge using high-resolution Chandra spectra of low-mass X-ray binaries. We fit the spectra with amodified version…
Sulfur X-ray absorption in the local ISM
Efrain Gatuzz, T. W. Gorczyca, M. F. Hasoglu +3
We present a study S K-edge using high-resolution HETGS {\it Chandra} spectra of 36 low-mas X-ray binaries. For each source, we have estimated column densities for {\rm S}~{\sc i},…
Carbon X-ray absorption in the local ISM: fingerprints in X-ray Novae spectra
E. Gatuzz, J. -U. Ness, T. W. Gorczyca +3
We present a study of the C K-edge using high-resolution LETGS Chandra spectra of four novae during their super-soft-source (SSS) phase. We identified absorption lines due to C~ii…
Radiation Damping in the Photoionization of Fe^{14+}
M. F. Hasoglu, T. W. Gorczyca, M. A. Bautista +2
A theoretical investigation of photoabsorption and photoionization of Fe^{14+} extending beyond an earlier frame transformation R-matrix implementation is performed using a fully-c…
A Comprehensive X-ray Absorption Model for Atomic Oxygen
T. W. Gorczyca, M. A. Bautista, M. F. Hasoglu +9
An analytical formula is developed to represent accurately the photoabsorption cross section of O I for all energies of interest in X-ray spectral modeling. In the vicinity of the…
L-shell Photoionisation Cross Sections in the S^{+}, S^{2+}, S^{3+} Isonuclear Sequence
J. -P. Mosnier, E. T. Kennedy, D. Cubaynes +6
We present absolute L-shell photoionisation cross sections for the S+, S2+, S3+ions. The cross sections were obtained using the monochromatised photon beam delivered by the SOLEIL…
Argon X-ray absorption in the local ISM
E. Gatuzz, T. W. Gorczyca, M. F. Hasoglu +2
We present the first comprehensive analysis of the argon K-edge absorption region (3.1-4.2 Ã ) using high-resolution HETGS {\it Chandra} spectra of 33 low-mas X-ray binaries. Utili…
K-Shell Photoabsorption Studies of the Carbon Isonuclear Sequence
M. F. Hasoglu, Sh. A. Abdel-Naby, T. W. Gorczyca +2
K-shell photoabsorption cross sections for the isonuclear C I - C IV ions have been computed using the R-matrix method. Above the K-shell threshold, the present results are in good…
K-Shell Photoabsorption of Magnesium Ions
M. F. Hasoglu, Sh. A. Abdel-Naby, E. Gatuzz +4
X-ray photoabsorption cross sections have been computed for all magnesium ions using the -matrix method. A comparison with the other available data for Mg II-Mg X shows good qua…